need to import Stateable, too. More may follow (aftermath of namespacing)

[core.git] / framework / main / classes / class_BaseFrameworkSystem.php

<?php
// Own namespace
namespace CoreFramework\Object;

// Import framework stuff
use CoreFramework\Bootstrap\FrameworkBootstrap;
use CoreFramework\Compressor\Compressor;
use CoreFramework\Configuration\FrameworkConfiguration;
use CoreFramework\Connection\Database\DatabaseConnection;
use CoreFramework\Controller\Controller;
use CoreFramework\Criteria\Criteria;
use CoreFramework\Criteria\Local\LocalSearchCriteria;
use CoreFramework\Criteria\Local\LocalUpdateCriteria;
use CoreFramework\Crypto\Cryptable;
use CoreFramework\Crypto\RandomNumber\RandomNumberGenerator;
use CoreFramework\Database\Frontend\DatabaseWrapper;
use CoreFramework\Factory\Database\Wrapper\DatabaseWrapperFactory;
use CoreFramework\Factory\ObjectFactory;
use CoreFramework\Filesystem\Block;
use CoreFramework\Filesystem\FilePointer;
use CoreFramework\Filesystem\FrameworkDirectory;
use CoreFramework\Filesystem\PathWriteProtectedException;
use CoreFramework\Generic\FrameworkInterface;
use CoreFramework\Generic\NullPointerException;
use CoreFramework\Handler\Stream\IoHandler;
use CoreFramework\Index\Indexable;
use CoreFramework\Listener\Listenable;
use CoreFramework\Lists\Listable;
use CoreFramework\Loader\ClassLoader;
use CoreFramework\Manager\ManageableApplication;
use CoreFramework\Middleware\Compressor\CompressorChannel;
use CoreFramework\Middleware\Debug\DebugMiddleware;
use CoreFramework\Parser\Parseable;
use CoreFramework\Registry\Register;
use CoreFramework\Registry\Registry;
use CoreFramework\Resolver\Resolver;
use CoreFramework\Result\Database\CachedDatabaseResult;
use CoreFramework\Result\Search\SearchableResult;
use CoreFramework\Stacker\Stackable;
use CoreFramework\State\Stateable;
use CoreFramework\Stream\Output\OutputStreamer;
use CoreFramework\Template\CompileableTemplate;
use CoreFramework\User\ManageableAccount;
use CoreFramework\Visitor\Visitor;

// Import SPL stuff
use \stdClass;
use \Iterator;
use \ReflectionClass;

/**
 * The simulator system class is the super class of all other classes. This
 * class handles saving of games etc.
 *
 * @author              Roland Haeder <webmaster@shipsimu.org>
 * @version             0.0.0
 * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
 * @license             GNU GPL 3.0 or any newer version
 * @link                http://www.shipsimu.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
class BaseFrameworkSystem extends stdClass implements FrameworkInterface {
        /**
         * Length of output from hash()
         */
        private static $hashLength = NULL;

        /**
         * The real class name
         */
        private $realClass = 'BaseFrameworkSystem';

        /**
         * Search criteria instance
         */
        private $searchInstance = NULL;

        /**
         * Update criteria instance
         */
        private $updateInstance = NULL;

        /**
         * The file I/O instance for the template loader
         */
        private $fileIoInstance = NULL;

        /**
         * Resolver instance
         */
        private $resolverInstance = NULL;

        /**
         * Template engine instance
         */
        private $templateInstance = NULL;

        /**
         * Database result instance
         */
        private $resultInstance = NULL;

        /**
         * Instance for user class
         */
        private $userInstance = NULL;

        /**
         * A controller instance
         */
        private $controllerInstance = NULL;

        /**
         * Instance of a RNG
         */
        private $rngInstance = NULL;

        /**
         * Instance of a crypto helper
         */
        private $cryptoInstance = NULL;

        /**
         * Instance of an Iterator class
         */
        private $iteratorInstance = NULL;

        /**
         * Instance of the list
         */
        private $listInstance = NULL;

        /**
         * Instance of a menu
         */
        private $menuInstance = NULL;

        /**
         * Instance of the image
         */
        private $imageInstance = NULL;

        /**
         * Instance of the stacker
         */
        private $stackInstance = NULL;

        /**
         * A Compressor instance
         */
        private $compressorInstance = NULL;

        /**
         * A Parseable instance
         */
        private $parserInstance = NULL;

        /**
         * A HandleableProtocol instance
         */
        private $protocolInstance = NULL;

        /**
         * A database wrapper instance
         */
        private $databaseInstance = NULL;

        /**
         * A helper instance for the form
         */
        private $helperInstance = NULL;

        /**
         * An instance of a Source class
         */
        private $sourceInstance = NULL;

        /**
         * An instance of a UrlSource class
         */
        private $urlSourceInstance = NULL;

        /**
         * An instance of a InputStream class
         */
        private $inputStreamInstance = NULL;

        /**
         * An instance of a OutputStream class
         */
        private $outputStreamInstance = NULL;

        /**
         * Networkable handler instance
         */
        private $handlerInstance = NULL;

        /**
         * Visitor handler instance
         */
        private $visitorInstance = NULL;

        /**
         * DHT instance
         */
        private $dhtInstance = NULL;

        /**
         * An instance of a database wrapper class
         */
        private $wrapperInstance = NULL;

        /**
         * An instance of a file I/O pointer class (not handler)
         */
        private $pointerInstance = NULL;

        /**
         * An instance of an Indexable class
         */
        private $indexInstance = NULL;

        /**
         * An instance of a Block class
         */
        private $blockInstance = NULL;

        /**
         * A Minable instance
         */
        private $minableInstance = NULL;

        /**
         * A FrameworkDirectory instance
         */
        private $directoryInstance = NULL;

        /**
         * Listener instance
         */
        private $listenerInstance = NULL;

        /**
         * An instance of a communicator
         */
        private $communicatorInstance = NULL;

        /**
         * The concrete output instance
         */
        private $outputInstance = NULL;

        /**
         * State instance
         */
        private $stateInstance = NULL;

        /**
         * Thousands separator
         */
        private $thousands = '.'; // German

        /**
         * Decimal separator
         */
        private $decimals  = ','; // German

        /**
         * Socket resource
         */
        private $socketResource = false;

        /**
         * Regular expression to use for validation
         */
        private $regularExpression = '';

        /**
         * Package data
         */
        private $packageData = array();

        /**
         * Generic array
         */
        private $genericArray = array();

        /**
         * Command name
         */
        private $commandName = '';

        /**
         * Controller name
         */
        private $controllerName = '';

        /**
         * Name of used protocol
         */
        private $protocolName = 'invalid';

        /**
         * Array with bitmasks and such for pack/unpack methods to support both
         * 32-bit and 64-bit systems
         */
        private $packingData = array(
                32 => array(
                        'step'   => 3,
                        'left'   => 0xffff0000,
                        'right'  => 0x0000ffff,
                        'factor' => 16,
                        'format' => 'II',
                ),
                64 => array(
                        'step'   => 7,
                        'left'   => 0xffffffff00000000,
                        'right'  => 0x00000000ffffffff,
                        'factor' => 32,
                        'format' => 'NN'
                )
        );

        /**
         * Simple 64-bit check, thanks to "Salman A" from stackoverflow.com:
         *
         * The integer size is 4 bytes on 32-bit and 8 bytes on a 64-bit system.
         */
        private $archArrayElement = false;

        /***********************
         * Exception codes.... *
         ***********************/

        // @todo Try to clean these constants up
        const EXCEPTION_IS_NULL_POINTER              = 0x001;
        const EXCEPTION_IS_NO_OBJECT                 = 0x002;
        const EXCEPTION_IS_NO_ARRAY                  = 0x003;
        const EXCEPTION_MISSING_METHOD               = 0x004;
        const EXCEPTION_CLASSES_NOT_MATCHING         = 0x005;
        const EXCEPTION_INDEX_OUT_OF_BOUNDS          = 0x006;
        const EXCEPTION_DIMENSION_ARRAY_INVALID      = 0x007;
        const EXCEPTION_ITEM_NOT_TRADEABLE           = 0x008;
        const EXCEPTION_ITEM_NOT_IN_PRICE_LIST       = 0x009;
        const EXCEPTION_GENDER_IS_WRONG              = 0x00a;
        const EXCEPTION_BIRTH_DATE_IS_INVALID        = 0x00b;
        const EXCEPTION_EMPTY_STRUCTURES_ARRAY       = 0x00c;
        const EXCEPTION_HAS_ALREADY_PERSONELL_LIST   = 0x00d;
        const EXCEPTION_NOT_ENOUGTH_UNEMPLOYEES      = 0x00e;
        const EXCEPTION_TOTAL_PRICE_NOT_CALCULATED   = 0x00f;
        const EXCEPTION_HARBOR_HAS_NO_SHIPYARDS      = 0x010;
        const EXCEPTION_CONTRACT_PARTNER_INVALID     = 0x011;
        const EXCEPTION_CONTRACT_PARTNER_MISMATCH    = 0x012;
        const EXCEPTION_CONTRACT_ALREADY_SIGNED      = 0x013;
        const EXCEPTION_UNEXPECTED_EMPTY_STRING      = 0x014;
        const EXCEPTION_PATH_NOT_FOUND               = 0x015;
        const EXCEPTION_INVALID_PATH_NAME            = 0x016;
        const EXCEPTION_READ_PROTECED_PATH           = 0x017;
        const EXCEPTION_WRITE_PROTECED_PATH          = 0x018;
        const EXCEPTION_DIR_POINTER_INVALID          = 0x019;
        const EXCEPTION_FILE_POINTER_INVALID         = 0x01a;
        const EXCEPTION_INVALID_RESOURCE             = 0x01b;
        const EXCEPTION_UNEXPECTED_OBJECT            = 0x01c;
        const EXCEPTION_LIMIT_ELEMENT_IS_UNSUPPORTED = 0x01d;
        const EXCEPTION_GETTER_IS_MISSING            = 0x01e;
        const EXCEPTION_ARRAY_EXPECTED               = 0x01f;
        const EXCEPTION_ARRAY_HAS_INVALID_COUNT      = 0x020;
        const EXCEPTION_ID_IS_INVALID_FORMAT         = 0x021;
        const EXCEPTION_MD5_CHECKSUMS_MISMATCH       = 0x022;
        const EXCEPTION_UNEXPECTED_STRING_SIZE       = 0x023;
        const EXCEPTION_SIMULATOR_ID_INVALID         = 0x024;
        const EXCEPTION_MISMATCHING_COMPRESSORS      = 0x025;
        const EXCEPTION_CONTAINER_ITEM_IS_NULL       = 0x026;
        const EXCEPTION_ITEM_IS_NO_ARRAY             = 0x027;
        const EXCEPTION_CONTAINER_MAYBE_DAMAGED      = 0x028;
        const EXCEPTION_INVALID_STRING               = 0x029;
        const EXCEPTION_VARIABLE_NOT_SET             = 0x02a;
        const EXCEPTION_ATTRIBUTES_ARE_MISSING       = 0x02b;
        const EXCEPTION_ARRAY_ELEMENTS_MISSING       = 0x02c;
        const EXCEPTION_TEMPLATE_ENGINE_UNSUPPORTED  = 0x02d;
        const EXCEPTION_UNSPPORTED_OPERATION         = 0x02e;
        const EXCEPTION_FACTORY_REQUIRE_PARAMETER    = 0x02f;
        const EXCEPTION_MISSING_ELEMENT              = 0x030;
        const EXCEPTION_HEADERS_ALREADY_SENT         = 0x031;
        const EXCEPTION_DEFAULT_CONTROLLER_GONE      = 0x032;
        const EXCEPTION_CLASS_NOT_FOUND              = 0x033;
        const EXCEPTION_REQUIRED_INTERFACE_MISSING   = 0x034;
        const EXCEPTION_FATAL_ERROR                  = 0x035;
        const EXCEPTION_FILE_NOT_FOUND               = 0x036;
        const EXCEPTION_ASSERTION_FAILED             = 0x037;
        const EXCEPTION_FILE_NOT_REACHABLE           = 0x038;
        const EXCEPTION_FILE_CANNOT_BE_READ          = 0x039;
        const EXCEPTION_FILE_CANNOT_BE_WRITTEN       = 0x03a;
        const EXCEPTION_PATH_CANNOT_BE_WRITTEN       = 0x03b;
        const EXCEPTION_DATABASE_UPDATED_NOT_ALLOWED = 0x03c;
        const EXCEPTION_FILTER_CHAIN_INTERCEPTED     = 0x03d;

        /**
         * Hexadecimal->Decimal translation array
         */
        private static $hexdec = array(
                '0' => 0,
                '1' => 1,
                '2' => 2,
                '3' => 3,
                '4' => 4,
                '5' => 5,
                '6' => 6,
                '7' => 7,
                '8' => 8,
                '9' => 9,
                'a' => 10,
                'b' => 11,
                'c' => 12,
                'd' => 13,
                'e' => 14,
                'f' => 15
        );

        /**
         * Decimal->hexadecimal translation array
         */
        private static $dechex = array(
                 0 => '0',
                 1 => '1',
                 2 => '2',
                 3 => '3',
                 4 => '4',
                 5 => '5',
                 6 => '6',
                 7 => '7',
                 8 => '8',
                 9 => '9',
                10 => 'a',
                11 => 'b',
                12 => 'c',
                13 => 'd',
                14 => 'e',
                15 => 'f'
        );

        /**
         * Startup time in miliseconds
         */
        private static $startupTime = 0;

        /**
         * Protected super constructor
         *
         * @param       $className      Name of the class
         * @return      void
         */
        protected function __construct ($className) {
                // Set real class
                $this->setRealClass($className);

                // Set configuration instance if no registry ...
                if (!$this instanceof Register) {
                        // ... because registries doesn't need to be configured
                        $this->setConfigInstance(FrameworkConfiguration::getSelfInstance());
                } // END - if

                // Is the startup time set? (0 cannot be true anymore)
                if (self::$startupTime == 0) {
                        // Then set it
                        self::$startupTime = microtime(true);
                } // END - if

                // Set array element
                $this->archArrayElement = (PHP_INT_SIZE === 8 ? 64 : 32);
        }

        /**
         * Destructor for all classes. You should not call this method on your own.
         *
         * @return      void
         */
        public function __destruct () {
                // Flush any updated entries to the database
                $this->flushPendingUpdates();

                // Is this object already destroyed?
                if ($this->__toString() != 'DestructedObject') {
                        // Destroy all informations about this class but keep some text about it alive
                        $this->setRealClass('DestructedObject');
                } elseif ((defined('DEBUG_DESTRUCTOR')) && (is_object($this->getDebugInstance()))) {
                        // Already destructed object
                        self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:] The object <span class="object_name">%s</span> is already destroyed.',
                                __CLASS__,
                                $this->__toString()
                        ));
                } else {
                        // Do not call this twice
                        trigger_error(__METHOD__ . ': Called twice.');
                        exit;
                }
        }

        /**
         * The __call() method where all non-implemented methods end up
         *
         * @param       $methodName             Name of the missing method
         * @args        $args                   Arguments passed to the method
         * @return      void
         */
        public final function __call ($methodName, $args) {
                return self::__callStatic($methodName, $args);
        }

        /**
         * The __callStatic() method where all non-implemented static methods end up
         *
         * @param       $methodName             Name of the missing method
         * @args        $args                   Arguments passed to the method
         * @return      void
         */
        public static final function __callStatic ($methodName, $args) {
                // Trace message
                //* PRINT-DEBUG: */ printf('[%s:%d]: methodName=%s,args[]=%s - CALLED!' . PHP_EOL, __METHOD__, __LINE__, $methodName, gettype($args));

                // Init argument string
                $argsString = '';

                // Is it NULL, empty or an array?
                if (is_null($args)) {
                        // No arguments
                        $argsString = 'NULL';
                } elseif (is_array($args)) {
                        // Start braces
                        $argsString = '(';

                        // Some arguments are there
                        foreach ($args as $arg) {
                                // Add data about the argument
                                $argsString .= gettype($arg) . ':';

                                if (is_null($arg)) {
                                        // Found a NULL argument
                                        $argsString .= 'NULL';
                                } elseif (is_string($arg)) {
                                        // Add length for strings
                                        $argsString .= strlen($arg);
                                } elseif ((is_int($arg)) || (is_float($arg))) {
                                        // ... integer/float
                                        $argsString .= $arg;
                                } elseif (is_array($arg)) {
                                        // .. or size if array
                                        $argsString .= count($arg);
                                } elseif (is_object($arg)) {
                                        // Get reflection
                                        $reflection = new ReflectionClass($arg);

                                        // Is an other object, maybe no __toString() available
                                        $argsString .= $reflection->getName();
                                } elseif ($arg === true) {
                                        // ... is boolean 'true'
                                        $argsString .= 'true';
                                } elseif ($arg === false) {
                                        // ... is boolean 'false'
                                        $argsString .= 'false';
                                }

                                // Comma for next one
                                $argsString .= ', ';
                        } // END - foreach

                        // Remove last comma
                        if (substr($argsString, -2, 1) == ',') {
                                $argsString = substr($argsString, 0, -2);
                        } // END - if

                        // Close braces
                        $argsString .= ')';
                } else {
                        // Invalid arguments!
                        $argsString = '!INVALID:' . gettype($args) . '!';
                }

                // Output stub message
                // @TODO __CLASS__ does always return BaseFrameworkSystem but not the extending (=child) class
                self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[unknown::%s:] Stub! Args: %s',
                        $methodName,
                        $argsString
                ));

                // Return nothing
                return NULL;
        }

        /**
         * Getter for $realClass
         *
         * @return      $realClass The name of the real class (not BaseFrameworkSystem)
         */
        public function __toString () {
                return $this->realClass;
        }

        /**
         * Magic method to catch setting of missing but set class fields/attributes
         *
         * @param       $name   Name of the field/attribute
         * @param       $value  Value to store
         * @return      void
         */
        public final function __set ($name, $value) {
                $this->debugBackTrace(sprintf('Tried to set a missing field. name=%s, value[%s]=%s',
                        $name,
                        gettype($value),
                        print_r($value, true)
                ));
        }

        /**
         * Magic method to catch getting of missing fields/attributes
         *
         * @param       $name   Name of the field/attribute
         * @return      void
         */
        public final function __get ($name) {
                $this->debugBackTrace(sprintf('Tried to get a missing field. name=%s',
                        $name
                ));
        }

        /**
         * Magic method to catch unsetting of missing fields/attributes
         *
         * @param       $name   Name of the field/attribute
         * @return      void
         */
        public final function __unset ($name) {
                $this->debugBackTrace(sprintf('Tried to unset a missing field. name=%s',
                        $name
                ));
        }

        /**
         * Magic method to catch object serialization
         *
         * @return      $unsupported    Unsupported method
         * @throws      UnsupportedOperationException   Objects of this framework cannot be serialized
         */
        public final function __sleep () {
                throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
        }

        /**
         * Magic method to catch object deserialization
         *
         * @return      $unsupported    Unsupported method
         * @throws      UnsupportedOperationException   Objects of this framework cannot be serialized
         */
        public final function __wakeup () {
                throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
        }

        /**
         * Magic method to catch calls when an object instance is called
         *
         * @return      $unsupported    Unsupported method
         * @throws      UnsupportedOperationException   Objects of this framework cannot be serialized
         */
        public final function __invoke () {
                throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
        }

        /**
         * Setter for the real class name
         *
         * @param       $realClass      Class name (string)
         * @return      void
         */
        public final function setRealClass ($realClass) {
                // Set real class
                $this->realClass = (string) $realClass;
        }

        /**
         * Setter for database result instance
         *
         * @param       $resultInstance         An instance of a database result class
         * @return      void
         * @todo        SearchableResult and UpdateableResult shall have a super interface to use here
         */
        protected final function setResultInstance (SearchableResult $resultInstance) {
                $this->resultInstance =  $resultInstance;
        }

        /**
         * Getter for database result instance
         *
         * @return      $resultInstance         An instance of a database result class
         */
        public final function getResultInstance () {
                return $this->resultInstance;
        }

        /**
         * Setter for template engine instances
         *
         * @param       $templateInstance       An instance of a template engine class
         * @return      void
         */
        protected final function setTemplateInstance (CompileableTemplate $templateInstance) {
                $this->templateInstance = $templateInstance;
        }

        /**
         * Getter for template engine instances
         *
         * @return      $templateInstance       An instance of a template engine class
         */
        protected final function getTemplateInstance () {
                return $this->templateInstance;
        }

        /**
         * Setter for search instance
         *
         * @param       $searchInstance         Searchable criteria instance
         * @return      void
         */
        public final function setSearchInstance (LocalSearchCriteria $searchInstance) {
                $this->searchInstance = $searchInstance;
        }

        /**
         * Getter for search instance
         *
         * @return      $searchInstance         Searchable criteria instance
         */
        public final function getSearchInstance () {
                return $this->searchInstance;
        }

        /**
         * Setter for update instance
         *
         * @param       $updateInstance         An instance of a LocalUpdateCriteria clase
         * @return      void
         */
        public final function setUpdateInstance (LocalUpdateCriteria $updateInstance) {
                $this->updateInstance = $updateInstance;
        }

        /**
         * Getter for update instance
         *
         * @return      $updateInstance         Updateable criteria instance
         */
        public final function getUpdateInstance () {
                return $this->updateInstance;
        }

        /**
         * Setter for resolver instance
         *
         * @param       $resolverInstance       Instance of a command resolver class
         * @return      void
         */
        public final function setResolverInstance (Resolver $resolverInstance) {
                $this->resolverInstance = $resolverInstance;
        }

        /**
         * Getter for resolver instance
         *
         * @return      $resolverInstance       Instance of a command resolver class
         */
        public final function getResolverInstance () {
                return $this->resolverInstance;
        }

        /**
         * Setter for language instance
         *
         * @param       $configInstance         The configuration instance which shall
         *                                                              be FrameworkConfiguration
         * @return      void
         */
        public final function setConfigInstance (FrameworkConfiguration $configInstance) {
                Registry::getRegistry()->addInstance('config', $configInstance);
        }

        /**
         * Getter for configuration instance
         *
         * @return      $configInstance         Configuration instance
         */
        public final function getConfigInstance () {
                $configInstance = Registry::getRegistry()->getInstance('config');
                return $configInstance;
        }

        /**
         * Setter for debug instance
         *
         * @param       $debugInstance  The instance for debug output class
         * @return      void
         */
        public final function setDebugInstance (DebugMiddleware $debugInstance) {
                Registry::getRegistry()->addInstance('debug', $debugInstance);
        }

        /**
         * Getter for debug instance
         *
         * @return      $debugInstance  Instance to class DebugConsoleOutput or DebugWebOutput
         */
        public final function getDebugInstance () {
                // Get debug instance
                $debugInstance = Registry::getRegistry()->getInstance('debug');

                // Return it
                return $debugInstance;
        }

        /**
         * Setter for web output instance
         *
         * @param       $webInstance    The instance for web output class
         * @return      void
         */
        public final function setWebOutputInstance (OutputStreamer $webInstance) {
                Registry::getRegistry()->addInstance('web_output', $webInstance);
        }

        /**
         * Getter for web output instance
         *
         * @return      $webOutputInstance - Instance to class WebOutput
         */
        public final function getWebOutputInstance () {
                $webOutputInstance = Registry::getRegistry()->getInstance('web_output');
                return $webOutputInstance;
        }

        /**
         * Setter for database instance
         *
         * @param       $databaseInstance       The instance for the database connection (forced DatabaseConnection)
         * @return      void
         */
        public final function setDatabaseInstance (DatabaseConnection $databaseInstance) {
                Registry::getRegistry()->addInstance('db_instance', $databaseInstance);
        }

        /**
         * Getter for database layer
         *
         * @return      $databaseInstance       The database layer instance
         */
        public final function getDatabaseInstance () {
                // Get instance
                $databaseInstance = Registry::getRegistry()->getInstance('db_instance');

                // Return instance
                return $databaseInstance;
        }

        /**
         * Setter for compressor channel
         *
         * @param       $compressorInstance             An instance of CompressorChannel
         * @return      void
         */
        public final function setCompressorChannel (CompressorChannel $compressorInstance) {
                Registry::getRegistry()->addInstance('compressor', $compressorInstance);
        }

        /**
         * Getter for compressor channel
         *
         * @return      $compressorInstance             The compressor channel
         */
        public final function getCompressorChannel () {
                $compressorInstance = Registry::getRegistry()->getInstance('compressor');
                return $compressorInstance;
        }

        /**
         * Protected getter for a manageable application helper class
         *
         * @return      $applicationInstance    An instance of a manageable application helper class
         */
        protected final function getApplicationInstance () {
                $applicationInstance = Registry::getRegistry()->getInstance('app');
                return $applicationInstance;
        }

        /**
         * Setter for a manageable application helper class
         *
         * @param       $applicationInstance    An instance of a manageable application helper class
         * @return      void
         */
        public final function setApplicationInstance (ManageableApplication $applicationInstance) {
                Registry::getRegistry()->addInstance('application', $applicationInstance);
        }

        /**
         * Private getter for language instance
         *
         * @return      $langInstance   An instance to the language sub-system
         */
        protected final function getLanguageInstance () {
                $langInstance = Registry::getRegistry()->getInstance('language');
                return $langInstance;
        }

        /**
         * Setter for language instance
         *
         * @param       $langInstance   An instance to the language sub-system
         * @return      void
         * @see         LanguageSystem
         */
        public final function setLanguageInstance (ManageableLanguage $langInstance) {
                Registry::getRegistry()->addInstance('language', $langInstance);
        }

        /**
         * Private getter for file IO instance
         *
         * @return      $fileIoInstance         An instance to the file I/O sub-system
         */
        protected final function getFileIoInstance () {
                return $this->fileIoInstance;
        }

        /**
         * Setter for file I/O instance
         *
         * @param       $fileIoInstance         An instance to the file I/O sub-system
         * @return      void
         */
        public final function setFileIoInstance (IoHandler $fileIoInstance) {
                $this->fileIoInstance = $fileIoInstance;
        }

        /**
         * Protected setter for user instance
         *
         * @param       $userInstance   An instance of a user class
         * @return      void
         */
        protected final function setUserInstance (ManageableAccount $userInstance) {
                $this->userInstance = $userInstance;
        }

        /**
         * Getter for user instance
         *
         * @return      $userInstance   An instance of a user class
         */
        public final function getUserInstance () {
                return $this->userInstance;
        }

        /**
         * Setter for controller instance (this surely breaks a bit the MVC patterm)
         *
         * @param       $controllerInstance             An instance of the controller
         * @return      void
         */
        public final function setControllerInstance (Controller $controllerInstance) {
                $this->controllerInstance = $controllerInstance;
        }

        /**
         * Getter for controller instance (this surely breaks a bit the MVC patterm)
         *
         * @return      $controllerInstance             An instance of the controller
         */
        public final function getControllerInstance () {
                return $this->controllerInstance;
        }

        /**
         * Setter for RNG instance
         *
         * @param       $rngInstance    An instance of a random number generator (RNG)
         * @return      void
         */
        protected final function setRngInstance (RandomNumberGenerator $rngInstance) {
                $this->rngInstance = $rngInstance;
        }

        /**
         * Getter for RNG instance
         *
         * @return      $rngInstance    An instance of a random number generator (RNG)
         */
        public final function getRngInstance () {
                return $this->rngInstance;
        }

        /**
         * Setter for Cryptable instance
         *
         * @param       $cryptoInstance An instance of a Cryptable class
         * @return      void
         */
        protected final function setCryptoInstance (Cryptable $cryptoInstance) {
                $this->cryptoInstance = $cryptoInstance;
        }

        /**
         * Getter for Cryptable instance
         *
         * @return      $cryptoInstance An instance of a Cryptable class
         */
        public final function getCryptoInstance () {
                return $this->cryptoInstance;
        }

        /**
         * Setter for the list instance
         *
         * @param       $listInstance   A list of Listable
         * @return      void
         */
        protected final function setListInstance (Listable $listInstance) {
                $this->listInstance = $listInstance;
        }

        /**
         * Getter for the list instance
         *
         * @return      $listInstance   A list of Listable
         */
        protected final function getListInstance () {
                return $this->listInstance;
        }

        /**
         * Setter for the menu instance
         *
         * @param       $menuInstance   A RenderableMenu instance
         * @return      void
         */
        protected final function setMenuInstance (RenderableMenu $menuInstance) {
                $this->menuInstance = $menuInstance;
        }

        /**
         * Getter for the menu instance
         *
         * @return      $menuInstance   A RenderableMenu instance
         */
        protected final function getMenuInstance () {
                return $this->menuInstance;
        }

        /**
         * Setter for image instance
         *
         * @param       $imageInstance  An instance of an image
         * @return      void
         */
        public final function setImageInstance (BaseImage $imageInstance) {
                $this->imageInstance = $imageInstance;
        }

        /**
         * Getter for image instance
         *
         * @return      $imageInstance  An instance of an image
         */
        public final function getImageInstance () {
                return $this->imageInstance;
        }

        /**
         * Setter for stacker instance
         *
         * @param       $stackInstance  An instance of an stacker
         * @return      void
         */
        public final function setStackInstance (Stackable $stackInstance) {
                $this->stackInstance = $stackInstance;
        }

        /**
         * Getter for stacker instance
         *
         * @return      $stackInstance  An instance of an stacker
         */
        public final function getStackInstance () {
                return $this->stackInstance;
        }

        /**
         * Setter for compressor instance
         *
         * @param       $compressorInstance     An instance of an compressor
         * @return      void
         */
        public final function setCompressorInstance (Compressor $compressorInstance) {
                $this->compressorInstance = $compressorInstance;
        }

        /**
         * Getter for compressor instance
         *
         * @return      $compressorInstance     An instance of an compressor
         */
        public final function getCompressorInstance () {
                return $this->compressorInstance;
        }

        /**
         * Setter for Parseable instance
         *
         * @param       $parserInstance An instance of an Parseable
         * @return      void
         */
        public final function setParserInstance (Parseable $parserInstance) {
                $this->parserInstance = $parserInstance;
        }

        /**
         * Getter for Parseable instance
         *
         * @return      $parserInstance An instance of an Parseable
         */
        public final function getParserInstance () {
                return $this->parserInstance;
        }

        /**
         * Setter for HandleableProtocol instance
         *
         * @param       $protocolInstance       An instance of an HandleableProtocol
         * @return      void
         */
        public final function setProtocolInstance (HandleableProtocol $protocolInstance) {
                $this->protocolInstance = $protocolInstance;
        }

        /**
         * Getter for HandleableProtocol instance
         *
         * @return      $protocolInstance       An instance of an HandleableProtocol
         */
        public final function getProtocolInstance () {
                return $this->protocolInstance;
        }

        /**
         * Setter for DatabaseWrapper instance
         *
         * @param       $wrapperInstance        An instance of an DatabaseWrapper
         * @return      void
         */
        public final function setWrapperInstance (DatabaseWrapper $wrapperInstance) {
                $this->wrapperInstance = $wrapperInstance;
        }

        /**
         * Getter for DatabaseWrapper instance
         *
         * @return      $wrapperInstance        An instance of an DatabaseWrapper
         */
        public final function getWrapperInstance () {
                return $this->wrapperInstance;
        }

        /**
         * Setter for socket resource
         *
         * @param       $socketResource         A valid socket resource
         * @return      void
         */
        public final function setSocketResource ($socketResource) {
                //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($this->__toString() . '::' . __FUNCTION__ . ': socketResource=' . $socketResource . ',previous[' . gettype($this->socketResource) . ']=' . $this->socketResource);
                $this->socketResource = $socketResource;
        }

        /**
         * Getter for socket resource
         *
         * @return      $socketResource         A valid socket resource
         */
        public final function getSocketResource () {
                //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($this->__toString() . '::' . __FUNCTION__ . ': socketResource[' . gettype($this->socketResource) . ']=' . $this->socketResource);
                return $this->socketResource;
        }

        /**
         * Setter for regular expression
         *
         * @param       $regularExpression      A valid regular expression
         * @return      void
         */
        public final function setRegularExpression ($regularExpression) {
                //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($this->__toString() . '::' . __FUNCTION__ . ': regularExpression=' . $regularExpression . ',previous[' . gettype($this->regularExpression) . ']=' . $this->regularExpression);
                $this->regularExpression = $regularExpression;
        }

        /**
         * Getter for regular expression
         *
         * @return      $regularExpression      A valid regular expression
         */
        public final function getRegularExpression () {
                //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($this->__toString() . '::' . __FUNCTION__ . ': regularExpression[' . gettype($this->regularExpression) . ']=' . $this->regularExpression);
                return $this->regularExpression;
        }

        /**
         * Setter for helper instance
         *
         * @param       $helperInstance         An instance of a helper class
         * @return      void
         */
        protected final function setHelperInstance (Helper $helperInstance) {
                $this->helperInstance = $helperInstance;
        }

        /**
         * Getter for helper instance
         *
         * @return      $helperInstance         An instance of a helper class
         */
        public final function getHelperInstance () {
                return $this->helperInstance;
        }

        /**
         * Setter for a Source instance
         *
         * @param       $sourceInstance         An instance of a Source class
         * @return      void
         */
        protected final function setSourceInstance (Source $sourceInstance) {
                $this->sourceInstance = $sourceInstance;
        }

        /**
         * Getter for a Source instance
         *
         * @return      $sourceInstance         An instance of a Source class
         */
        protected final function getSourceInstance () {
                return $this->sourceInstance;
        }

        /**
         * Setter for a UrlSource instance
         *
         * @param       $sourceInstance         An instance of a UrlSource class
         * @return      void
         */
        protected final function setUrlSourceInstance (UrlSource $urlSourceInstance) {
                $this->urlSourceInstance = $urlSourceInstance;
        }

        /**
         * Getter for a UrlSource instance
         *
         * @return      $urlSourceInstance              An instance of a UrlSource class
         */
        protected final function getUrlSourceInstance () {
                return $this->urlSourceInstance;
        }

        /**
         * Getter for a InputStream instance
         *
         * @param       $inputStreamInstance    The InputStream instance
         */
        protected final function getInputStreamInstance () {
                return $this->inputStreamInstance;
        }

        /**
         * Setter for a InputStream instance
         *
         * @param       $inputStreamInstance    The InputStream instance
         * @return      void
         */
        protected final function setInputStreamInstance (InputStream $inputStreamInstance) {
                $this->inputStreamInstance = $inputStreamInstance;
        }

        /**
         * Getter for a OutputStream instance
         *
         * @param       $outputStreamInstance   The OutputStream instance
         */
        protected final function getOutputStreamInstance () {
                return $this->outputStreamInstance;
        }

        /**
         * Setter for a OutputStream instance
         *
         * @param       $outputStreamInstance   The OutputStream instance
         * @return      void
         */
        protected final function setOutputStreamInstance (OutputStream $outputStreamInstance) {
                $this->outputStreamInstance = $outputStreamInstance;
        }

        /**
         * Setter for handler instance
         *
         * @param       $handlerInstance        An instance of a Handleable class
         * @return      void
         */
        protected final function setHandlerInstance (Handleable $handlerInstance) {
                $this->handlerInstance = $handlerInstance;
        }

        /**
         * Getter for handler instance
         *
         * @return      $handlerInstance        A Networkable instance
         */
        protected final function getHandlerInstance () {
                return $this->handlerInstance;
        }

        /**
         * Setter for visitor instance
         *
         * @param       $visitorInstance        A Visitor instance
         * @return      void
         */
        protected final function setVisitorInstance (Visitor $visitorInstance) {
                $this->visitorInstance = $visitorInstance;
        }

        /**
         * Getter for visitor instance
         *
         * @return      $visitorInstance        A Visitor instance
         */
        protected final function getVisitorInstance () {
                return $this->visitorInstance;
        }

        /**
         * Setter for DHT instance
         *
         * @param       $dhtInstance    A Distributable instance
         * @return      void
         */
        protected final function setDhtInstance (Distributable $dhtInstance) {
                $this->dhtInstance = $dhtInstance;
        }

        /**
         * Getter for DHT instance
         *
         * @return      $dhtInstance    A Distributable instance
         */
        protected final function getDhtInstance () {
                return $this->dhtInstance;
        }

        /**
         * Setter for raw package Data
         *
         * @param       $packageData    Raw package Data
         * @return      void
         */
        public final function setPackageData (array $packageData) {
                $this->packageData = $packageData;
        }

        /**
         * Getter for raw package Data
         *
         * @return      $packageData    Raw package Data
         */
        public function getPackageData () {
                return $this->packageData;
        }


        /**
         * Setter for Iterator instance
         *
         * @param       $iteratorInstance       An instance of an Iterator
         * @return      void
         */
        protected final function setIteratorInstance (Iterator $iteratorInstance) {
                $this->iteratorInstance = $iteratorInstance;
        }

        /**
         * Getter for Iterator instance
         *
         * @return      $iteratorInstance       An instance of an Iterator
         */
        public final function getIteratorInstance () {
                return $this->iteratorInstance;
        }

        /**
         * Setter for FilePointer instance
         *
         * @param       $pointerInstance        An instance of an FilePointer class
         * @return      void
         */
        protected final function setPointerInstance (FilePointer $pointerInstance) {
                $this->pointerInstance = $pointerInstance;
        }

        /**
         * Getter for FilePointer instance
         *
         * @return      $pointerInstance        An instance of an FilePointer class
         */
        public final function getPointerInstance () {
                return $this->pointerInstance;
        }

        /**
         * Unsets pointer instance which triggers a call of __destruct() if the
         * instance is still there. This is surely not fatal on already "closed"
         * file pointer instances.
         *
         * I don't want to mess around with above setter by giving it a default
         * value NULL as setter should always explicitly only set (existing) object
         * instances and NULL is NULL.
         *
         * @return      void
         */
        protected final function unsetPointerInstance () {
                // Simply it to NULL
                $this->pointerInstance = NULL;
        }

        /**
         * Setter for Indexable instance
         *
         * @param       $indexInstance  An instance of an Indexable class
         * @return      void
         */
        protected final function setIndexInstance (Indexable $indexInstance) {
                $this->indexInstance = $indexInstance;
        }

        /**
         * Getter for Indexable instance
         *
         * @return      $indexInstance  An instance of an Indexable class
         */
        public final function getIndexInstance () {
                return $this->indexInstance;
        }

        /**
         * Setter for Block instance
         *
         * @param       $blockInstance  An instance of an Block class
         * @return      void
         */
        protected final function setBlockInstance (Block $blockInstance) {
                $this->blockInstance = $blockInstance;
        }

        /**
         * Getter for Block instance
         *
         * @return      $blockInstance  An instance of an Block class
         */
        public final function getBlockInstance () {
                return $this->blockInstance;
        }

        /**
         * Setter for Minable instance
         *
         * @param       $minableInstance        A Minable instance
         * @return      void
         */
        protected final function setMinableInstance (Minable $minableInstance) {
                $this->minableInstance = $minableInstance;
        }

        /**
         * Getter for minable instance
         *
         * @return      $minableInstance        A Minable instance
         */
        protected final function getMinableInstance () {
                return $this->minableInstance;
        }

        /**
         * Setter for FrameworkDirectory instance
         *
         * @param       $directoryInstance      A FrameworkDirectory instance
         * @return      void
         */
        protected final function setDirectoryInstance (FrameworkDirectory $directoryInstance) {
                $this->directoryInstance = $directoryInstance;
        }

        /**
         * Getter for FrameworkDirectory instance
         *
         * @return      $directoryInstance      A FrameworkDirectory instance
         */
        protected final function getDirectoryInstance () {
                return $this->directoryInstance;
        }

        /**
         * Setter for listener instance
         *
         * @param       $listenerInstance       A Listenable instance
         * @return      void
         */
        protected final function setListenerInstance (Listenable $listenerInstance) {
                $this->listenerInstance = $listenerInstance;
        }

        /**
         * Getter for listener instance
         *
         * @return      $listenerInstance       A Listenable instance
         */
        protected final function getListenerInstance () {
                return $this->listenerInstance;
        }

        /**
         * Getter for communicator instance
         *
         * @return      $communicatorInstance   An instance of a Communicator class
         */
        public final function getCommunicatorInstance () {
                return $this->communicatorInstance;
        }

        /**
         * Setter for communicator instance
         *
         * @param       $communicatorInstance   An instance of a Communicator class
         * @return      void
         */
        protected final function setCommunicatorInstance (Communicator $communicatorInstance) {
                $this->communicatorInstance = $communicatorInstance;
        }

        /**
         * Setter for state instance
         *
         * @param       $stateInstance  A Stateable instance
         * @return      void
         */
        public final function setStateInstance (Stateable $stateInstance) {
                $this->stateInstance = $stateInstance;
        }

        /**
         * Getter for state instance
         *
         * @return      $stateInstance  A Stateable instance
         */
        public final function getStateInstance () {
                return $this->stateInstance;
        }

        /**
         * Setter for output instance
         *
         * @param       $outputInstance The debug output instance
         * @return      void
         */
        public final function setOutputInstance (OutputStreamer $outputInstance) {
                $this->outputInstance = $outputInstance;
        }

        /**
         * Getter for output instance
         *
         * @return      $outputInstance The debug output instance
         */
        public final function getOutputInstance () {
                return $this->outputInstance;
        }

        /**
         * Setter for command name
         *
         * @param       $commandName    Last validated command name
         * @return      void
         */
        protected final function setCommandName ($commandName) {
                $this->commandName = $commandName;
        }

        /**
         * Getter for command name
         *
         * @return      $commandName    Last validated command name
         */
        protected final function getCommandName () {
                return $this->commandName;
        }

        /**
         * Setter for controller name
         *
         * @param       $controllerName Last validated controller name
         * @return      void
         */
        protected final function setControllerName ($controllerName) {
                $this->controllerName = $controllerName;
        }

        /**
         * Getter for controller name
         *
         * @return      $controllerName Last validated controller name
         */
        protected final function getControllerName () {
                return $this->controllerName;
        }

        /**
         * Getter for protocol name
         *
         * @return      $protocolName   Name of used protocol
         */
        public final function getProtocolName () {
                return $this->protocolName;
        }

        /**
         * Setter for protocol name
         *
         * @param       $protocolName   Name of used protocol
         * @return      void
         */
        protected final function setProtocolName ($protocolName) {
                $this->protocolName = $protocolName;
        }

        /**
         * Checks whether an object equals this object. You should overwrite this
         * method to implement own equality checks
         *
         * @param       $objectInstance         An instance of a FrameworkInterface object
         * @return      $equals                         Whether both objects equals
         */
        public function equals (FrameworkInterface $objectInstance) {
                // Now test it
                $equals = ((
                        $this->__toString() == $objectInstance->__toString()
                ) && (
                        $this->hashCode() == $objectInstance->hashCode()
                ));

                // Return the result
                return $equals;
        }

        /**
         * Generates a generic hash code of this class. You should really overwrite
         * this method with your own hash code generator code. But keep KISS in mind.
         *
         * @return      $hashCode       A generic hash code respresenting this whole class
         */
        public function hashCode () {
                // Simple hash code
                return crc32($this->__toString());
        }

        /**
         * Formats computer generated price values into human-understandable formats
         * with thousand and decimal separators.
         *
         * @param       $value          The in computer format value for a price
         * @param       $currency       The currency symbol (use HTML-valid characters!)
         * @param       $decNum         Number of decimals after commata
         * @return      $price          The for the current language formated price string
         * @throws      MissingDecimalsThousandsSeparatorException      If decimals or
         *                                                                                              thousands separator
         *                                                                                              is missing
         */
        public function formatCurrency ($value, $currency = '&euro;', $decNum = 2) {
                // Are all required attriutes set?
                if ((!isset($this->decimals)) || (!isset($this->thousands))) {
                        // Throw an exception
                        throw new MissingDecimalsThousandsSeparatorException($this, self::EXCEPTION_ATTRIBUTES_ARE_MISSING);
                } // END - if

                // Cast the number
                $value = (float) $value;

                // Reformat the US number
                $price = number_format($value, $decNum, $this->decimals, $this->thousands) . $currency;

                // Return as string...
                return $price;
        }

        /**
         * Appends a trailing slash to a string
         *
         * @param       $str    A string (maybe) without trailing slash
         * @return      $str    A string with an auto-appended trailing slash
         */
        public final function addMissingTrailingSlash ($str) {
                // Is there a trailing slash?
                if (substr($str, -1, 1) != '/') {
                        $str .= '/';
                } // END - if

                // Return string with trailing slash
                return $str;
        }

        /**
         * Prepare the template engine (HtmlTemplateEngine by default) for a given
         * application helper instance (ApplicationHelper by default).
         *
         * @param               $applicationInstance    An application helper instance or
         *                                                                              null if we shall use the default
         * @return              $templateInstance               The template engine instance
         * @throws              NullPointerException    If the discovered application
         *                                                                              instance is still null
         */
        protected function prepareTemplateInstance (ManageableApplication $applicationInstance = NULL) {
                // Is the application instance set?
                if (is_null($applicationInstance)) {
                        // Get the current instance
                        $applicationInstance = Registry::getRegistry()->getInstance('app');

                        // Still null?
                        if (is_null($applicationInstance)) {
                                // Thrown an exception
                                throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
                        } // END - if
                } // END - if

                // Initialize the template engine
                $templateInstance = ObjectFactory::createObjectByConfiguredName('html_template_class');

                // Return the prepared instance
                return $templateInstance;
        }

        /**
         * Debugs this instance by putting out it's full content
         *
         * @param       $message        Optional message to show in debug output
         * @return      void
         */
        public final function debugInstance ($message = '') {
                // Restore the error handler to avoid trouble with missing array elements or undeclared variables
                restore_error_handler();

                // Init content
                $content = '';

                // Is a message set?
                if (!empty($message)) {
                        // Construct message
                        $content = sprintf('<div class="debug_message">Message: %s</div>' . PHP_EOL, $message);
                } // END - if

                // Generate the output
                $content .= sprintf('<pre>%s</pre>',
                        trim(
                                htmlentities(
                                        print_r($this, true)
                                )
                        )
                );

                // Output it
                ApplicationEntryPoint::app_exit(sprintf('<div class="debug_header">%s debug output:</div><div class="debug_content">%s</div>Loaded includes: <div class="debug_include_list">%s</div>',
                        $this->__toString(),
                        $content,
                        ClassLoader::getSelfInstance()->getPrintableIncludeList()
                ));
        }

        /**
         * Replaces control characters with printable output
         *
         * @param       $str    String with control characters
         * @return      $str    Replaced string
         */
        protected function replaceControlCharacters ($str) {
                // Replace them
                $str = str_replace(
                        chr(13), '[r]', str_replace(
                        chr(10), '[n]', str_replace(
                        chr(9) , '[t]',
                        $str
                )));

                // Return it
                return $str;
        }

        /**
         * Output a partial stub message for the caller method
         *
         * @param       $message        An optional message to display
         * @return      void
         */
        protected function partialStub ($message = '') {
                // Get the backtrace
                $backtrace = debug_backtrace();

                // Generate the class::method string
                $methodName = 'UnknownClass-&gt;unknownMethod';
                if ((isset($backtrace[1]['class'])) && (isset($backtrace[1]['function']))) {
                        $methodName = $backtrace[1]['class'] . '-&gt;' . $backtrace[1]['function'];
                } // END - if

                // Construct the full message
                $stubMessage = sprintf('[%s:] Partial stub!',
                        $methodName
                );

                // Is the extra message given?
                if (!empty($message)) {
                        // Then add it as well
                        $stubMessage .= ' Message: ' . $message;
                } // END - if

                // Debug instance is there?
                if (!is_null($this->getDebugInstance())) {
                        // Output stub message
                        self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($stubMessage);
                } else {
                        // Trigger an error
                        trigger_error($stubMessage);
                        exit;
                }
        }

        /**
         * Outputs a debug backtrace and stops further script execution
         *
         * @param       $message        An optional message to output
         * @param       $doExit         Whether exit the program (true is default)
         * @return      void
         */
        public function debugBackTrace ($message = '', $doExit = true) {
                // Sorry, there is no other way getting this nice backtrace
                if (!empty($message)) {
                        // Output message
                        printf('Message: %s<br />' . PHP_EOL, $message);
                } // END - if

                print('<pre>');
                debug_print_backtrace();
                print('</pre>');

                // Exit program?
                if ($doExit === true) {
                        exit();
                } // END - if
        }

        /**
         * Creates an instance of a debugger instance
         *
         * @param       $className              Name of the class (currently unsupported)
         * @param       $lineNumber             Line number where the call was made
         * @return      $debugInstance  An instance of a debugger class
         * @deprecated  Not fully, as the new Logger facilities are not finished yet.
         */
        public final static function createDebugInstance ($className, $lineNumber = NULL) {
                // Is the instance set?
                if (!Registry::getRegistry()->instanceExists('debug')) {
                        // Init debug instance
                        $debugInstance = NULL;

                        // Try it
                        try {
                                // Get a debugger instance
                                $debugInstance = DebugMiddleware::createDebugMiddleware(FrameworkConfiguration::getSelfInstance()->getConfigEntry('debug_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_class'), $className);
                        } catch (NullPointerException $e) {
                                // Didn't work, no instance there
                                exit(sprintf('Cannot create debugInstance! Exception=%s,message=%s,className=%s,lineNumber=%d' . PHP_EOL, $e->__toString(), $e->getMessage(), $className, $lineNumber));
                        }

                        // Empty string should be ignored and used for testing the middleware
                        DebugMiddleware::getSelfInstance()->output('');

                        // Set it in its own class. This will set it in the registry
                        $debugInstance->setDebugInstance($debugInstance);
                } else {
                        // Get instance from registry
                        $debugInstance = Registry::getRegistry()->getDebugInstance();
                }

                // Return it
                return $debugInstance;
        }

        /**
         * Simple output of a message with line-break
         *
         * @param       $message        Message to output
         * @return      void
         */
        public function outputLine ($message) {
                // Simply output it
                print($message . PHP_EOL);
        }

        /**
         * Outputs a debug message whether to debug instance (should be set!) or
         * dies with or ptints the message. Do NEVER EVER rewrite the exit() call to
         * ApplicationEntryPoint::app_exit(), this would cause an endless loop.
         *
         * @param       $message        Message we shall send out...
         * @param       $doPrint        Whether print or die here (default: print)
         * @paran       $stripTags      Whether to strip tags (default: false)
         * @return      void
         */
        public function debugOutput ($message, $doPrint = true, $stripTags = false) {
                // Set debug instance to NULL
                $debugInstance = NULL;

                // Try it:
                try {
                        // Get debug instance
                        $debugInstance = $this->getDebugInstance();
                } catch (NullPointerException $e) {
                        // The debug instance is not set (yet)
                }

                // Is the debug instance there?
                if (is_object($debugInstance)) {
                        // Use debug output handler
                        $debugInstance->output($message, $stripTags);

                        if ($doPrint === false) {
                                // Die here if not printed
                                exit();
                        } // END - if
                } else {
                        // Are debug times enabled?
                        if ($this->getConfigInstance()->getConfigEntry('debug_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_output_timings') == 'Y') {
                                // Prepent it
                                $message = $this->getPrintableExecutionTime() . $message;
                        } // END - if

                        // Put directly out
                        if ($doPrint === true) {
                                // Print message
                                $this->outputLine($message);
                        } else {
                                // Die here
                                exit($message);
                        }
                }
        }

        /**
         * Converts e.g. a command from URL to a valid class by keeping out bad characters
         *
         * @param       $str            The string, what ever it is needs to be converted
         * @return      $className      Generated class name
         */
        public static final function convertToClassName ($str) {
                // Init class name
                $className = '';

                // Convert all dashes in underscores
                $str = self::convertDashesToUnderscores($str);

                // Now use that underscores to get classname parts for hungarian style
                foreach (explode('_', $str) as $strPart) {
                        // Make the class name part lower case and first upper case
                        $className .= ucfirst(strtolower($strPart));
                } // END - foreach

                // Return class name
                return $className;
        }

        /**
         * Converts dashes to underscores, e.g. useable for configuration entries
         *
         * @param       $str    The string with maybe dashes inside
         * @return      $str    The converted string with no dashed, but underscores
         */
        public static final function convertDashesToUnderscores ($str) {
                // Convert them all
                $str = str_replace('-', '_', $str);

                // Return converted string
                return $str;
        }

        /**
         * Marks up the code by adding e.g. line numbers
         *
         * @param       $phpCode                Unmarked PHP code
         * @return      $markedCode             Marked PHP code
         */
        public function markupCode ($phpCode) {
                // Init marked code
                $markedCode = '';

                // Get last error
                $errorArray = error_get_last();

                // Init the code with error message
                if (is_array($errorArray)) {
                        // Get error infos
                        $markedCode = sprintf('<div id="error_header">File: <span id="error_data">%s</span>, Line: <span id="error_data">%s</span>, Message: <span id="error_data">%s</span>, Type: <span id="error_data">%s</span></div>',
                                basename($errorArray['file']),
                                $errorArray['line'],
                                $errorArray['message'],
                                $errorArray['type']
                        );
                } // END - if

                // Add line number to the code
                foreach (explode(chr(10), $phpCode) as $lineNo => $code) {
                        // Add line numbers
                        $markedCode .= sprintf('<span id="code_line">%s</span>: %s' . PHP_EOL,
                                ($lineNo + 1),
                                htmlentities($code, ENT_QUOTES)
                        );
                } // END - foreach

                // Return the code
                return $markedCode;
        }

        /**
         * Filter a given GMT timestamp (non Uni* stamp!) to make it look more
         * beatiful for web-based front-ends. If null is given a message id
         * null_timestamp will be resolved and returned.
         *
         * @param       $timestamp      Timestamp to prepare (filter) for display
         * @return      $readable       A readable timestamp
         */
        public function doFilterFormatTimestamp ($timestamp) {
                // Default value to return
                $readable = '???';

                // Is the timestamp null?
                if (is_null($timestamp)) {
                        // Get a message string
                        $readable = $this->getLanguageInstance()->getMessage('null_timestamp');
                } else {
                        switch ($this->getLanguageInstance()->getLanguageCode()) {
                                case 'de': // German format is a bit different to default
                                        // Split the GMT stamp up
                                        $dateTime  = explode(' ', $timestamp  );
                                        $dateArray = explode('-', $dateTime[0]);
                                        $timeArray = explode(':', $dateTime[1]);

                                        // Construct the timestamp
                                        $readable = sprintf($this->getConfigInstance()->getConfigEntry('german_date_time'),
                                                $dateArray[0],
                                                $dateArray[1],
                                                $dateArray[2],
                                                $timeArray[0],
                                                $timeArray[1],
                                                $timeArray[2]
                                        );
                                        break;

                                default: // Default is pass-through
                                        $readable = $timestamp;
                                        break;
                        } // END - switch
                }

                // Return the stamp
                return $readable;
        }

        /**
         * Filter a given number into a localized number
         *
         * @param       $value          The raw value from e.g. database
         * @return      $localized      Localized value
         */
        public function doFilterFormatNumber ($value) {
                // Generate it from config and localize dependencies
                switch ($this->getLanguageInstance()->getLanguageCode()) {
                        case 'de': // German format is a bit different to default
                                $localized = number_format($value, $this->getConfigInstance()->getConfigEntry('decimals'), ',', '.');
                                break;

                        default: // US, etc.
                                $localized = number_format($value, $this->getConfigInstance()->getConfigEntry('decimals'), '.', ',');
                                break;
                } // END - switch

                // Return it
                return $localized;
        }

        /**
         * "Getter" for databse entry
         *
         * @return      $entry  An array with database entries
         * @throws      NullPointerException    If the database result is not found
         * @throws      InvalidDatabaseResultException  If the database result is invalid
         */
        protected final function getDatabaseEntry () {
                // Is there an instance?
                if (!$this->getResultInstance() instanceof SearchableResult) {
                        // Throw an exception here
                        throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
                } // END - if

                // Rewind it
                $this->getResultInstance()->rewind();

                // Do we have an entry?
                if ($this->getResultInstance()->valid() === false) {
                        // @TODO Move the constant to e.g. BaseDatabaseResult when there is a non-cached database result available
                        throw new InvalidDatabaseResultException(array($this, $this->getResultInstance()), CachedDatabaseResult::EXCEPTION_INVALID_DATABASE_RESULT);
                } // END - if

                // Get next entry
                $this->getResultInstance()->next();

                // Fetch it
                $entry = $this->getResultInstance()->current();

                // And return it
                return $entry;
        }

        /**
         * Getter for field name
         *
         * @param       $fieldName              Field name which we shall get
         * @return      $fieldValue             Field value from the user
         * @throws      NullPointerException    If the result instance is null
         */
        public final function getField ($fieldName) {
                // Default field value
                $fieldValue = NULL;

                // Get result instance
                $resultInstance = $this->getResultInstance();

                // Is this instance null?
                if (is_null($resultInstance)) {
                        // Then the user instance is no longer valid (expired cookies?)
                        throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
                } // END - if

                // Get current array
                $fieldArray = $resultInstance->current();
                //* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($fieldName.':<pre>'.print_r($fieldArray, true).'</pre>');

                // Convert dashes to underscore
                $fieldName2 = self::convertDashesToUnderscores($fieldName);

                // Does the field exist?
                if ($this->isFieldSet($fieldName)) {
                        // Get it
                        $fieldValue = $fieldArray[$fieldName2];
                } elseif (defined('DEVELOPER')) {
                        // Missing field entry, may require debugging
                        self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ']:fieldArray<pre>=' . print_r($fieldArray, true) . '</pre>,fieldName=' . $fieldName . ' not found!');
                } else {
                        // Missing field entry, may require debugging
                        self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ']:fieldName=' . $fieldName . ' not found!');
                }

                // Return it
                return $fieldValue;
        }

        /**
         * Checks if given field is set
         *
         * @param       $fieldName      Field name to check
         * @return      $isSet          Whether the given field name is set
         * @throws      NullPointerException    If the result instance is null
         */
        public function isFieldSet ($fieldName) {
                // Get result instance
                $resultInstance = $this->getResultInstance();

                // Is this instance null?
                if (is_null($resultInstance)) {
                        // Then the user instance is no longer valid (expired cookies?)
                        throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
                } // END - if

                // Get current array
                $fieldArray = $resultInstance->current();
                //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('[' . $this->__toString() . ':' . __LINE__ . '] fieldName=' . $fieldName . ',fieldArray=<pre>'.print_r($fieldArray, true).'</pre>');

                // Convert dashes to underscore
                $fieldName = self::convertDashesToUnderscores($fieldName);

                // Determine it
                $isSet = isset($fieldArray[$fieldName]);

                // Return result
                return $isSet;
        }

        /**
         * Flushs all pending updates to the database layer
         *
         * @return      void
         */
        public function flushPendingUpdates () {
                // Get result instance
                $resultInstance = $this->getResultInstance();

                // Do we have data to update?
                if ((is_object($resultInstance)) && ($resultInstance->ifDataNeedsFlush())) {
                        // Get wrapper class name config entry
                        $configEntry = $resultInstance->getUpdateInstance()->getWrapperConfigEntry();

                        // Create object instance
                        $wrapperInstance = DatabaseWrapperFactory::createWrapperByConfiguredName($configEntry);

                        // Yes, then send the whole result to the database layer
                        $wrapperInstance->doUpdateByResult($this->getResultInstance());
                } // END - if
        }

        /**
         * Outputs a deprecation warning to the developer.
         *
         * @param       $message        The message we shall output to the developer
         * @return      void
         * @todo        Write a logging mechanism for productive mode
         */
        public function deprecationWarning ($message) {
                // Is developer mode active?
                if (defined('DEVELOPER')) {
                        // Debug instance is there?
                        if (!is_null($this->getDebugInstance())) {
                                // Output stub message
                                self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($message);
                        } else {
                                // Trigger an error
                                trigger_error($message . "<br />\n");
                                exit;
                        }
                } else {
                        // @TODO Finish this part!
                        $this->partialStub('Developer mode inactive. Message:' . $message);
                }
        }

        /**
         * Checks whether the given PHP extension is loaded
         *
         * @param       $phpExtension   The PHP extension we shall check
         * @return      $isLoaded       Whether the PHP extension is loaded
         */
        public final function isPhpExtensionLoaded ($phpExtension) {
                // Is it loaded?
                $isLoaded = in_array($phpExtension, get_loaded_extensions());

                // Return result
                return $isLoaded;
        }

        /**
         * "Getter" as a time() replacement but with milliseconds. You should use this
         * method instead of the encapsulated getimeofday() function.
         *
         * @return      $milliTime      Timestamp with milliseconds
         */
        public function getMilliTime () {
                // Get the time of day as float
                $milliTime = gettimeofday(true);

                // Return it
                return $milliTime;
        }

        /**
         * Idles (sleeps) for given milliseconds
         *
         * @return      $hasSlept       Whether it goes fine
         */
        public function idle ($milliSeconds) {
                // Sleep is fine by default
                $hasSlept = true;

                // Idle so long with found function
                if (function_exists('time_sleep_until')) {
                        // Get current time and add idle time
                        $sleepUntil = $this->getMilliTime() + abs($milliSeconds) / 1000;

                        // New PHP 5.1.0 function found, ignore errors
                        $hasSlept = @time_sleep_until($sleepUntil);
                } else {
                        /*
                         * My Sun station doesn't have that function even with latest PHP
                         * package. :(
                         */
                        usleep($milliSeconds * 1000);
                }

                // Return result
                return $hasSlept;
        }
        /**
         * Converts a hexadecimal string, even with negative sign as first string to
         * a decimal number using BC functions.
         *
         * This work is based on comment #86673 on php.net documentation page at:
         * <http://de.php.net/manual/en/function.dechex.php#86673>
         *
         * @param       $hex    Hexadecimal string
         * @return      $dec    Decimal number
         */
        protected function hex2dec ($hex) {
                // Convert to all lower-case
                $hex = strtolower($hex);

                // Detect sign (negative/positive numbers)
                $sign = '';
                if (substr($hex, 0, 1) == '-') {
                        $sign = '-';
                        $hex = substr($hex, 1);
                } // END - if

                // Decode the hexadecimal string into a decimal number
                $dec = 0;
                for ($i = strlen($hex) - 1, $e = 1; $i >= 0; $i--, $e = bcmul($e, 16)) {
                        $factor = self::$hexdec[substr($hex, $i, 1)];
                        $dec = bcadd($dec, bcmul($factor, $e));
                } // END - for

                // Return the decimal number
                return $sign . $dec;
        }

        /**
         * Converts even very large decimal numbers, also signed, to a hexadecimal
         * string.
         *
         * This work is based on comment #97756 on php.net documentation page at:
         * <http://de.php.net/manual/en/function.hexdec.php#97756>
         *
         * @param       $dec            Decimal number, even with negative sign
         * @param       $maxLength      Optional maximum length of the string
         * @return      $hex    Hexadecimal string
         */
        protected function dec2hex ($dec, $maxLength = 0) {
                // maxLength can be zero or devideable by 2
                assert(($maxLength == 0) || (($maxLength % 2) == 0));

                // Detect sign (negative/positive numbers)
                $sign = '';
                if ($dec < 0) {
                        $sign = '-';
                        $dec = abs($dec);
                } // END - if

                // Encode the decimal number into a hexadecimal string
                $hex = '';
                do {
                        $hex = self::$dechex[($dec % (2 ^ 4))] . $hex;
                        $dec /= (2 ^ 4);
                } while ($dec >= 1);

                /*
                 * Leading zeros are required for hex-decimal "numbers". In some
                 * situations more leading zeros are wanted, so check for both
                 * conditions.
                 */
                if ($maxLength > 0) {
                        // Prepend more zeros
                        $hex = str_pad($hex, $maxLength, '0', STR_PAD_LEFT);
                } elseif ((strlen($hex) % 2) != 0) {
                        // Only make string's length dividable by 2
                        $hex = '0' . $hex;
                }

                // Return the hexadecimal string
                return $sign . $hex;
        }

        /**
         * Converts a ASCII string (0 to 255) into a decimal number.
         *
         * @param       $asc    The ASCII string to be converted
         * @return      $dec    Decimal number
         */
        protected function asc2dec ($asc) {
                // Convert it into a hexadecimal number
                $hex = bin2hex($asc);

                // And back into a decimal number
                $dec = $this->hex2dec($hex);

                // Return it
                return $dec;
        }

        /**
         * Converts a decimal number into an ASCII string.
         *
         * @param       $dec            Decimal number
         * @return      $asc    An ASCII string
         */
        protected function dec2asc ($dec) {
                // First convert the number into a hexadecimal string
                $hex = $this->dec2hex($dec);

                // Then convert it into the ASCII string
                $asc = $this->hex2asc($hex);

                // Return it
                return $asc;
        }

        /**
         * Converts a hexadecimal number into an ASCII string. Negative numbers
         * are not allowed.
         *
         * @param       $hex    Hexadecimal string
         * @return      $asc    An ASCII string
         */
        protected function hex2asc ($hex) {
                // Check for length, it must be devideable by 2
                //* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('hex='.$hex);
                assert((strlen($hex) % 2) == 0);

                // Walk the string
                $asc = '';
                for ($idx = 0; $idx < strlen($hex); $idx+=2) {
                        // Get the decimal number of the chunk
                        $part = hexdec(substr($hex, $idx, 2));

                        // Add it to the final string
                        $asc .= chr($part);
                } // END - for

                // Return the final string
                return $asc;
        }

        /**
         * Checks whether the given encoded data was encoded with Base64
         *
         * @param       $encodedData    Encoded data we shall check
         * @return      $isBase64               Whether the encoded data is Base64
         */
        protected function isBase64Encoded ($encodedData) {
                // Determine it
                $isBase64 = (@base64_decode($encodedData, true) !== false);

                // Return it
                return $isBase64;
        }

        /**
         * Gets a cache key from Criteria instance
         *
         * @param       $criteriaInstance       An instance of a Criteria class
         * @param       $onlyKeys                       Only use these keys for a cache key
         * @return      $cacheKey                       A cache key suitable for lookup/storage purposes
         */
        protected function getCacheKeyByCriteria (Criteria $criteriaInstance, array $onlyKeys = array()) {
                // Generate it
                $cacheKey = sprintf('%s@%s',
                        $this->__toString(),
                        $criteriaInstance->getCacheKey($onlyKeys)
                );

                // And return it
                //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput($this->__toString() . ': cacheKey=' . $cacheKey);
                return $cacheKey;
        }

        /**
         * Getter for startup time in miliseconds
         *
         * @return      $startupTime    Startup time in miliseconds
         */
        protected function getStartupTime () {
                return self::$startupTime;
        }

        /**
         * "Getter" for a printable currently execution time in nice braces
         *
         * @return      $executionTime  Current execution time in nice braces
         */
        protected function getPrintableExecutionTime () {
                // Caculate the execution time
                $executionTime = microtime(true) - $this->getStartupTime();

                // Pack it in nice braces
                $executionTime = sprintf('[ %01.5f ] ', $executionTime);

                // And return it
                return $executionTime;
        }

        /**
         * Hashes a given string with a simple but stronger hash function (no salt)
         * and hex-encode it.
         *
         * @param       $str    The string to be hashed
         * @return      $hash   The hash from string $str
         */
        public static final function hash ($str) {
                // Hash given string with (better secure) hasher
                $hash = bin2hex(mhash(MHASH_SHA256, $str));

                // Return it
                return $hash;
        }

        /**
         * "Getter" for length of hash() output. This will be "cached" to speed up
         * things.
         *
         * @return      $length         Length of hash() output
         */
        public static final function getHashLength () {
                // Is it cashed?
                if (is_null(self::$hashLength)) {
                        // No, then hash a string and save its length.
                        self::$hashLength = strlen(self::hash('abc123'));
                } // END - if

                // Return it
                return self::$hashLength;
        }

        /**
         * Checks whether the given number is really a number (only chars 0-9).
         *
         * @param       $num            A string consisting only chars between 0 and 9
         * @param       $castValue      Whether to cast the value to double. Do only use this to secure numbers from Requestable classes.
         * @param       $assertMismatch         Whether to assert mismatches
         * @return      $ret            The (hopefully) secured numbered value
         */
        public function bigintval ($num, $castValue = true, $assertMismatch = false) {
                // Filter all numbers out
                $ret = preg_replace('/[^0123456789]/', '', $num);

                // Shall we cast?
                if ($castValue === true) {
                        // Cast to biggest numeric type
                        $ret = (double) $ret;
                } // END - if

                // Assert only if requested
                if ($assertMismatch === true) {
                        // Has the whole value changed?
                        assert(('' . $ret . '' != '' . $num . '') && (!is_null($num)));
                } // END - if

                // Return result
                return $ret;
        }

        /**
         * Checks whether the given hexadecimal number is really a hex-number (only chars 0-9,a-f).
         *
         * @param       $num    A string consisting only chars between 0 and 9
         * @param       $assertMismatch         Whether to assert mismatches
         * @return      $ret    The (hopefully) secured hext-numbered value
         */
        public function hexval ($num, $assertMismatch = false) {
                // Filter all numbers out
                $ret = preg_replace('/[^0123456789abcdefABCDEF]/', '', $num);

                // Assert only if requested
                if ($assertMismatch === true) {
                        // Has the whole value changed?
                        assert(('' . $ret . '' != '' . $num . '') && (!is_null($num)));
                } // END - if

                // Return result
                return $ret;
        }

        /**
         * Checks whether start/end marker are set
         *
         * @param       $data   Data to be checked
         * @return      $isset  Whether start/end marker are set
         */
        public final function ifStartEndMarkersSet ($data) {
                // Determine it
                $isset = ((substr($data, 0, strlen(BaseRawDataHandler::STREAM_START_MARKER)) == BaseRawDataHandler::STREAM_START_MARKER) && (substr($data, -1 * strlen(BaseRawDataHandler::STREAM_END_MARKER), strlen(BaseRawDataHandler::STREAM_END_MARKER)) == BaseRawDataHandler::STREAM_END_MARKER));

                // ... and return it
                return $isset;
        }

        /**
         * Determines if an element is set in the generic array
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to check
         * @param       $element        Element to check
         * @return      $isset          Whether the given key is set
         */
        protected final function isGenericArrayElementSet ($keyGroup, $subGroup, $key, $element) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element);

                // Is it there?
                $isset = isset($this->genericArray[$keyGroup][$subGroup][$key][$element]);

                // Return it
                return $isset;
        }
        /**
         * Determines if a key is set in the generic array
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to check
         * @return      $isset          Whether the given key is set
         */
        protected final function isGenericArrayKeySet ($keyGroup, $subGroup, $key) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key);

                // Is it there?
                $isset = isset($this->genericArray[$keyGroup][$subGroup][$key]);

                // Return it
                return $isset;
        }


        /**
         * Determines if a group is set in the generic array
         *
         * @param       $keyGroup       Main group
         * @param       $subGroup       Sub group
         * @return      $isset          Whether the given group is set
         */
        protected final function isGenericArrayGroupSet ($keyGroup, $subGroup) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup);

                // Is it there?
                $isset = isset($this->genericArray[$keyGroup][$subGroup]);

                // Return it
                return $isset;
        }

        /**
         * Getter for sub key group
         *
         * @param       $keyGroup       Main key group
         * @param       $subGroup       Sub key group
         * @return      $array          An array with all array elements
         */
        protected final function getGenericSubArray ($keyGroup, $subGroup) {
                // Is it there?
                if (!$this->isGenericArrayGroupSet($keyGroup, $subGroup)) {
                        // No, then abort here
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ' not found.');
                        exit;
                } // END - if

                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',value=' . print_r($this->genericArray[$keyGroup][$subGroup], true));

                // Return it
                return $this->genericArray[$keyGroup][$subGroup];
        }

        /**
         * Unsets a given key in generic array
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @return      void
         */
        protected final function unsetGenericArrayKey ($keyGroup, $subGroup, $key) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key);

                // Remove it
                unset($this->genericArray[$keyGroup][$subGroup][$key]);
        }

        /**
         * Unsets a given element in generic array
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @param       $element        Element to unset
         * @return      void
         */
        protected final function unsetGenericArrayElement ($keyGroup, $subGroup, $key, $element) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element);

                // Remove it
                unset($this->genericArray[$keyGroup][$subGroup][$key][$element]);
        }

        /**
         * Append a string to a given generic array key
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @param       $value          Value to add/append
         * @return      void
         */
        protected final function appendStringToGenericArrayKey ($keyGroup, $subGroup, $key, $value, $appendGlue = '') {
                // Debug message
                //* NOISY-DEBUG: */ if (!is_object($value)) $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',value[' . gettype($value) . ']=' . print_r($value, true) . ',appendGlue=' . $appendGlue);

                // Is it already there?
                if ($this->isGenericArrayKeySet($keyGroup, $subGroup, $key)) {
                        // Append it
                        $this->genericArray[$keyGroup][$subGroup][$key] .= $appendGlue . (string) $value;
                } else {
                        // Add it
                        $this->genericArray[$keyGroup][$subGroup][$key] = (string) $value;
                }
        }

        /**
         * Append a string to a given generic array element
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @param       $element        Element to check
         * @param       $value          Value to add/append
         * @return      void
         */
        protected final function appendStringToGenericArrayElement ($keyGroup, $subGroup, $key, $element, $value, $appendGlue = '') {
                // Debug message
                //* NOISY-DEBUG: */ if (!is_object($value)) $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element . ',value[' . gettype($value) . ']=' . print_r($value, true) . ',appendGlue=' . $appendGlue);

                // Is it already there?
                if ($this->isGenericArrayElementSet($keyGroup, $subGroup, $key, $element)) {
                        // Append it
                        $this->genericArray[$keyGroup][$subGroup][$key][$element] .= $appendGlue . (string) $value;
                } else {
                        // Add it
                        $this->setStringGenericArrayElement($keyGroup, $subGroup, $key, $element, $value);
                }
        }

        /**
         * Sets a string in a given generic array element
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @param       $element        Element to check
         * @param       $value          Value to add/append
         * @return      void
         */
        protected final function setStringGenericArrayElement ($keyGroup, $subGroup, $key, $element, $value, $appendGlue = '') {
                // Debug message
                //* NOISY-DEBUG: */ if (!is_object($value)) $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element . ',value[' . gettype($value) . ']=' . print_r($value, true) . ',appendGlue=' . $appendGlue);

                // Set it
                $this->genericArray[$keyGroup][$subGroup][$key][$element] = (string) $value;
        }

        /**
         * Initializes given generic array group
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to use
         * @param       $forceInit      Optionally force initialization
         * @return      void
         */
        protected final function initGenericArrayGroup ($keyGroup, $subGroup, $forceInit = false) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',forceInit=' . intval($forceInit));

                // Is it already set?
                if (($forceInit === false) && ($this->isGenericArrayGroupSet($keyGroup, $subGroup))) {
                        // Already initialized
                        trigger_error(__METHOD__ . ':keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ' already initialized.');
                        exit;
                } // END - if

                // Initialize it
                $this->genericArray[$keyGroup][$subGroup] = array();
        }

        /**
         * Initializes given generic array key
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to use
         * @param       $forceInit      Optionally force initialization
         * @return      void
         */
        protected final function initGenericArrayKey ($keyGroup, $subGroup, $key, $forceInit = false) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',forceInit=' . intval($forceInit));

                // Is it already set?
                if (($forceInit === false) && ($this->isGenericArrayKeySet($keyGroup, $subGroup, $key))) {
                        // Already initialized
                        trigger_error(__METHOD__ . ':keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ' already initialized.');
                        exit;
                } // END - if

                // Initialize it
                $this->genericArray[$keyGroup][$subGroup][$key] = array();
        }

        /**
         * Initializes given generic array element
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to use
         * @param       $element        Element to use
         * @param       $forceInit      Optionally force initialization
         * @return      void
         */
        protected final function initGenericArrayElement ($keyGroup, $subGroup, $key, $element, $forceInit = false) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element . ',forceInit=' . intval($forceInit));

                // Is it already set?
                if (($forceInit === false) && ($this->isGenericArrayElementSet($keyGroup, $subGroup, $key, $element))) {
                        // Already initialized
                        trigger_error(__METHOD__ . ':keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element . ' already initialized.');
                        exit;
                } // END - if

                // Initialize it
                $this->genericArray[$keyGroup][$subGroup][$key][$element] = array();
        }

        /**
         * Pushes an element to a generic key
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to use
         * @param       $value          Value to add/append
         * @return      $count          Number of array elements
         */
        protected final function pushValueToGenericArrayKey ($keyGroup, $subGroup, $key, $value) {
                // Debug message
                //* NOISY-DEBUG: */ if (!is_object($value)) $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',value[' . gettype($value) . ']=' . print_r($value, true));

                // Is it set?
                if (!$this->isGenericArrayKeySet($keyGroup, $subGroup, $key)) {
                        // Initialize array
                        $this->initGenericArrayKey($keyGroup, $subGroup, $key);
                } // END - if

                // Then push it
                $count = array_push($this->genericArray[$keyGroup][$subGroup][$key], $value);

                // Return count
                //* DEBUG: */ print(__METHOD__ . ': genericArray=' . print_r($this->genericArray[$keyGroup][$subGroup][$key], true));
                //* DEBUG: */ print(__METHOD__ . ': count=' . $count . PHP_EOL);
                return $count;
        }

        /**
         * Pushes an element to a generic array element
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to use
         * @param       $element        Element to check
         * @param       $value          Value to add/append
         * @return      $count          Number of array elements
         */
        protected final function pushValueToGenericArrayElement ($keyGroup, $subGroup, $key, $element, $value) {
                // Debug message
                //* NOISY-DEBUG: */ if (!is_object($value)) $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element . ',value[' . gettype($value) . ']=' . print_r($value, true));

                // Is it set?
                if (!$this->isGenericArrayElementSet($keyGroup, $subGroup, $key, $element)) {
                        // Initialize array
                        $this->initGenericArrayElement($keyGroup, $subGroup, $key, $element);
                } // END - if

                // Then push it
                $count = array_push($this->genericArray[$keyGroup][$subGroup][$key][$element], $value);

                // Return count
                //* DEBUG: */ print(__METHOD__ . ': genericArray=' . print_r($this->genericArray[$keyGroup][$subGroup][$key], true));
                //* DEBUG: */ print(__METHOD__ . ': count=' . $count . PHP_EOL);
                return $count;
        }

        /**
         * Pops an element from  a generic group
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @return      $value          Last "popped" value
         */
        protected final function popGenericArrayElement ($keyGroup, $subGroup, $key) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key);

                // Is it set?
                if (!$this->isGenericArrayKeySet($keyGroup, $subGroup, $key)) {
                        // Not found
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ' not found.');
                        exit;
                } // END - if

                // Then "pop" it
                $value = array_pop($this->genericArray[$keyGroup][$subGroup][$key]);

                // Return value
                //* DEBUG: */ print(__METHOD__ . ': genericArray=' . print_r($this->genericArray[$keyGroup][$subGroup][$key], true));
                //* DEBUG: */ print(__METHOD__ . ': value[' . gettype($value) . ']=' . print_r($value, true) . PHP_EOL);
                return $value;
        }

        /**
         * Shifts an element from  a generic group
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @return      $value          Last "popped" value
         */
        protected final function shiftGenericArrayElement ($keyGroup, $subGroup, $key) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key);

                // Is it set?
                if (!$this->isGenericArrayKeySet($keyGroup, $subGroup, $key)) {
                        // Not found
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ' not found.');
                        exit;
                } // END - if

                // Then "shift" it
                $value = array_shift($this->genericArray[$keyGroup][$subGroup][$key]);

                // Return value
                //* DEBUG: */ print(__METHOD__ . ': genericArray=' . print_r($this->genericArray[$keyGroup][$subGroup][$key], true));
                //* DEBUG: */ print(__METHOD__ . ': value[' . gettype($value) . ']=' . print_r($value, true) . PHP_EOL);
                return $value;
        }

        /**
         * Count generic array group
         *
         * @param       $keyGroup       Main group for the key
         * @return      $count          Count of given group
         */
        protected final function countGenericArray ($keyGroup) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup);

                // Is it there?
                if (!isset($this->genericArray[$keyGroup])) {
                        // Abort here
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ' not found.');
                        exit;
                } // END - if

                // Then count it
                $count = count($this->genericArray[$keyGroup]);

                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',count=' . $count);

                // Return it
                return $count;
        }

        /**
         * Count generic array sub group
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @return      $count          Count of given group
         */
        protected final function countGenericArrayGroup ($keyGroup, $subGroup) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup);

                // Is it there?
                if (!$this->isGenericArrayGroupSet($keyGroup, $subGroup)) {
                        // Abort here
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ' not found.');
                        exit;
                } // END - if

                // Then count it
                $count = count($this->genericArray[$keyGroup][$subGroup]);

                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',count=' . $count);

                // Return it
                return $count;
        }

        /**
         * Count generic array elements
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @para        $key            Key to count
         * @return      $count          Count of given key
         */
        protected final function countGenericArrayElements ($keyGroup, $subGroup, $key) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key);

                // Is it there?
                if (!$this->isGenericArrayKeySet($keyGroup, $subGroup, $key)) {
                        // Abort here
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ' not found.');
                        exit;
                } elseif (!$this->isValidGenericArrayGroup($keyGroup, $subGroup)) {
                        // Not valid
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ' is not an array.');
                        exit;
                }

                // Then count it
                $count = count($this->genericArray[$keyGroup][$subGroup][$key]);

                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',count=' . $count);

                // Return it
                return $count;
        }

        /**
         * Getter for whole generic group array
         *
         * @param       $keyGroup       Key group to get
         * @return      $array          Whole generic array group
         */
        protected final function getGenericArray ($keyGroup) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup);

                // Is it there?
                if (!isset($this->genericArray[$keyGroup])) {
                        // Then abort here
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ' does not exist.');
                        exit;
                } // END - if

                // Return it
                return $this->genericArray[$keyGroup];
        }

        /**
         * Setter for generic array key
         *
         * @param       $keyGroup       Key group to get
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @param       $value          Mixed value from generic array element
         * @return      void
         */
        protected final function setGenericArrayKey ($keyGroup, $subGroup, $key, $value) {
                // Debug message
                //* NOISY-DEBUG: */ if (!is_object($value)) $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',value[' . gettype($value) . ']=' . print_r($value, true));

                // Set value here
                $this->genericArray[$keyGroup][$subGroup][$key] = $value;
        }

        /**
         * Getter for generic array key
         *
         * @param       $keyGroup       Key group to get
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to unset
         * @return      $value          Mixed value from generic array element
         */
        protected final function getGenericArrayKey ($keyGroup, $subGroup, $key) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key);

                // Is it there?
                if (!$this->isGenericArrayKeySet($keyGroup, $subGroup, $key)) {
                        // Then abort here
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ' does not exist.');
                        exit;
                } // END - if

                // Return it
                return $this->genericArray[$keyGroup][$subGroup][$key];
        }

        /**
         * Sets a value in given generic array key/element
         *
         * @param       $keyGroup       Main group for the key
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to set
         * @param       $element        Element to set
         * @param       $value          Value to set
         * @return      void
         */
        protected final function setGenericArrayElement ($keyGroup, $subGroup, $key, $element, $value) {
                // Debug message
                //* NOISY-DEBUG: */ if (!is_object($value)) $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element . ',value[' . gettype($value) . ']=' . print_r($value, true));

                // Then set it
                $this->genericArray[$keyGroup][$subGroup][$key][$element] = $value;
        }

        /**
         * Getter for generic array element
         *
         * @param       $keyGroup       Key group to get
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to look for
         * @param       $element        Element to look for
         * @return      $value          Mixed value from generic array element
         */
        protected final function getGenericArrayElement ($keyGroup, $subGroup, $key, $element) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element);

                // Is it there?
                if (!$this->isGenericArrayElementSet($keyGroup, $subGroup, $key, $element)) {
                        // Then abort here
                        trigger_error(__METHOD__ . ': keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key . ',element=' . $element . ' does not exist.');
                        exit;
                } // END - if

                // Return it
                return $this->genericArray[$keyGroup][$subGroup][$key][$element];
        }

        /**
         * Checks if a given sub group is valid (array)
         *
         * @param       $keyGroup       Key group to get
         * @param       $subGroup       Sub group for the key
         * @return      $isValid        Whether given sub group is valid
         */
        protected final function isValidGenericArrayGroup ($keyGroup, $subGroup) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup);

                // Determine it
                $isValid = (($this->isGenericArrayGroupSet($keyGroup, $subGroup)) && (is_array($this->getGenericSubArray($keyGroup, $subGroup))));

                // Return it
                return $isValid;
        }

        /**
         * Checks if a given key is valid (array)
         *
         * @param       $keyGroup       Key group to get
         * @param       $subGroup       Sub group for the key
         * @param       $key            Key to check
         * @return      $isValid        Whether given sub group is valid
         */
        protected final function isValidGenericArrayKey ($keyGroup, $subGroup, $key) {
                // Debug message
                //* NOISY-DEBUG: */ $this->outputLine('[' . __METHOD__ . ':' . __LINE__ . '] keyGroup=' . $keyGroup . ',subGroup=' . $subGroup . ',key=' . $key);

                // Determine it
                $isValid = (($this->isGenericArrayKeySet($keyGroup, $subGroup, $key)) && (is_array($this->getGenericArrayKey($keyGroup, $subGroup, $key))));

                // Return it
                return $isValid;
        }

        /**
         * Initializes the web output instance
         *
         * @return      void
         */
        protected function initWebOutputInstance () {
                // Get application instance
                $applicationInstance = Registry::getRegistry()->getInstance('app');

                // Init web output instance
                $outputInstance = ObjectFactory::createObjectByConfiguredName('output_class', array($applicationInstance));

                // Set it locally
                $this->setWebOutputInstance($outputInstance);
        }

        /**
         * Translates boolean true to 'Y' and false to 'N'
         *
         * @param       $boolean                Boolean value
         * @return      $translated             Translated boolean value
         */
        public static final function translateBooleanToYesNo ($boolean) {
                // Make sure it is really boolean
                assert(is_bool($boolean));

                // "Translate" it
                $translated = ($boolean === true) ? 'Y' : 'N';

                // ... and return it
                return $translated;
        }

        /**
         * Encodes raw data (almost any type) by "serializing" it and then pack it
         * into a "binary format".
         *
         * @param       $rawData        Raw data (almost any type)
         * @return      $encoded        Encoded data
         */
        protected function encodeData ($rawData) {
                // Make sure no objects or resources pass through
                assert(!is_object($rawData));
                assert(!is_resource($rawData));

                // First "serialize" it (json_encode() is faster than serialize())
                $encoded = $this->packString(json_encode($rawData));

                // And return it
                return $encoded;
        }

        /**
         * Pack a string into a "binary format". Please execuse me that this is
         * widely undocumented. :-(
         *
         * @param       $str            Unpacked string
         * @return      $packed         Packed string
         * @todo        Improve documentation
         */
        protected function packString ($str) {
                // Debug message
                //* NOISY-DEBUG */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('str=' . $str . ' - CALLED!');

                // First compress the string (gzcompress is okay)
                $str = gzcompress($str);

                // Init variable
                $packed = '';

                // And start the "encoding" loop
                for ($idx = 0; $idx < strlen($str); $idx += $this->packingData[$this->archArrayElement]['step']) {
                        $big = 0;
                        for ($i = 0; $i < $this->packingData[$this->archArrayElement]['step']; $i++) {
                                $factor = ($this->packingData[$this->archArrayElement]['step'] - 1 - $i);

                                if (($idx + $i) <= strlen($str)) {
                                        $ord = ord(substr($str, ($idx + $i), 1));

                                        $add = $ord * pow(256, $factor);

                                        $big += $add;

                                        //print 'idx=' . $idx . ',i=' . $i . ',ord=' . $ord . ',factor=' . $factor . ',add=' . $add . ',big=' . $big . PHP_EOL;
                                } // END - if
                        } // END - for

                        $l = ($big & $this->packingData[$this->archArrayElement]['left']) >>$this->packingData[$this->archArrayElement]['factor'];
                        $r = $big & $this->packingData[$this->archArrayElement]['right'];

                        $chunk = str_pad(pack($this->packingData[$this->archArrayElement]['format'], $l, $r), 8, '0', STR_PAD_LEFT);
                        //* NOISY-DEBUG */ print 'big=' . $big . ',chunk('.strlen($chunk) . ')='.md5($chunk).PHP_EOL;

                        $packed .= $chunk;
                } // END - for

                // Return it
                //* NOISY-DEBUG */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('packed=' . $packed . ' - EXIT!');
                return $packed;
        }

        /**
         * Creates a full-qualified file name (FQFN) for given file name by adding
         * a configured temporary file path to it.
         *
         * @param       $fileName       Name for temporary file
         * @return      $fqfn   Full-qualified file name
         * @throw       PathWriteProtectedException If the path in 'temp_file_path' is write-protected
         * @throws      FileIoException If the file cannot be written
         */
         protected static function createTempPathForFile ($fileName) {
                // Get config entry
                $basePath = FrameworkConfiguration::getSelfInstance()->getConfigEntry('temp_file_path');

                // Is the path writeable?
                if (!is_writable($basePath)) {
                        // Path is write-protected
                        throw new PathWriteProtectedException($fileName, self::EXCEPTION_PATH_CANNOT_BE_WRITTEN);
                } // END - if

                // Add it
                $fqfn = $basePath . '/' . $fileName;

                // Is it reachable?
                if (!FrameworkBootstrap::isReachableFilePath($fqfn)) {
                        // Not reachable
                        throw new FileIoException($fqfn, self::EXCEPTION_FILE_NOT_REACHABLE);
                } // END - if

                // Return it
                return $fqfn;
         }

        /**
         * "Getter" for a printable state name
         *
         * @return      $stateName      Name of the node's state in a printable format
         */
        public final function getPrintableState () {
                // Default is 'null'
                $stateName = 'null';

                // Get the state instance
                $stateInstance = $this->getStateInstance();

                // Is it an instance of Stateable?
                if ($stateInstance instanceof Stateable) {
                        // Then use that state name
                        $stateName = $stateInstance->getStateName();
                } // END - if

                // Return result
                return $stateName;
        }

        /**
         * Handles socket error for given socket resource and peer data. This method
         * validates $socketResource if it is a valid resource (see is_resource())
         * but assumes valid data in array $recipientData, except that
         * count($recipientData) is always 2.
         *
         * @param       $method                         Value of __METHOD__ from calling method
         * @param       $line                           Value of __LINE__ from calling method
         * @param       $socketResource         A valid socket resource
         * @param       $socketData                     A valid socket data array (0 = IP/file name, 1 = port)
         * @return      void
         * @throws      InvalidSocketException  If $socketResource is no socket resource
         * @throws      NoSocketErrorDetectedException  If socket_last_error() gives zero back
         * @todo        Move all this socket-related stuff into own class, most of it resides in BaseListener
         */
        protected final function handleSocketError ($method, $line, $socketResource, array $socketData) {
                // This method handles only socket resources
                if (!is_resource($socketResource)) {
                        // No resource, abort here
                        throw new InvalidSocketException(array($this, $socketResource), BaseListener::EXCEPTION_INVALID_SOCKET);
                } // END - if

                // Check socket array, 1st element is mostly IP address (or file name), 2nd is port number
                //* DEBUG-DIE: */ die(__METHOD__ . ':socketData=' . print_r($socketData, true));
                assert(isset($socketData[0]));
                assert(isset($socketData[1]));

                // Get error code for first validation (0 is not an error)
                $errorCode = socket_last_error($socketResource);

                // If the error code is zero, someone called this method without an error
                if ($errorCode == 0) {
                        // No error detected (or previously cleared outside this method)
                        throw new NoSocketErrorDetectedException(array($this, $socketResource), BaseListener::EXCEPTION_NO_SOCKET_ERROR);
                } // END - if

                // Get handler (method) name
                $handlerName = $this->getSocketErrorHandlerFromCode($errorCode);

                // Call-back the error handler method
                call_user_func_array(array($this, $handlerName), array($socketResource, $socketData));

                // Finally clear the error because it has been handled
                socket_clear_error($socketResource);
        }

}