X-Git-Url: https://git.mxchange.org/?p=core.git;a=blobdiff_plain;f=framework%2Fmain%2Fclasses%2Ftemplate%2Fclass_BaseTemplateEngine.php;h=dccbddc41df98b31ab945f89005e05fad5c9bb28;hp=1908e3bc9b87eef6372134402779611f29e4177a;hb=refs%2Fheads%2Fmaster;hpb=2b4f4b88ec5f9d385110e800494c680e164b5a36

diff --git a/framework/main/classes/template/class_BaseTemplateEngine.php b/framework/main/classes/template/class_BaseTemplateEngine.php
index 1908e3bc..dccbddc4 100644
--- a/framework/main/classes/template/class_BaseTemplateEngine.php
+++ b/framework/main/classes/template/class_BaseTemplateEngine.php
@@ -5,14 +5,19 @@ namespace Org\Mxchange\CoreFramework\Template\Engine;
 // Import framework stuff
 use Org\Mxchange\CoreFramework\Bootstrap\FrameworkBootstrap;
 use Org\Mxchange\CoreFramework\EntryPoint\ApplicationEntryPoint;
-use Org\Mxchange\CoreFramework\Factory\ObjectFactory;
+use Org\Mxchange\CoreFramework\Factory\Object\ObjectFactory;
 use Org\Mxchange\CoreFramework\Filesystem\FileNotFoundException;
+use Org\Mxchange\CoreFramework\Generic\FrameworkInterface;
+use Org\Mxchange\CoreFramework\Generic\NullPointerException;
+use Org\Mxchange\CoreFramework\Helper\Application\ApplicationHelper;
 use Org\Mxchange\CoreFramework\Manager\ManageableApplication;
 use Org\Mxchange\CoreFramework\Object\BaseFrameworkSystem;
-use Org\Mxchange\CoreFramework\Registry\GenericRegistry;
 use Org\Mxchange\CoreFramework\Response\Responseable;
+use Org\Mxchange\CoreFramework\Traits\Handler\Io\IoHandlerTrait;
+use Org\Mxchange\CoreFramework\Utils\Strings\StringUtils;
 
 // Import SPL stuff
+use \BadMethodCallException;
 use \InvalidArgumentException;
 use \SplFileInfo;
 
@@ -21,7 +26,7 @@ use \SplFileInfo;
  *
  * @author		Roland Haeder <webmaster@shipsimu.org>
  * @version		0.0.0
- * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
+ * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2023 Core Developer Team
  * @license		GNU GPL 3.0 or any newer version
  * @link		http://www.shipsimu.org
  *
@@ -39,6 +44,20 @@ use \SplFileInfo;
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 abstract class BaseTemplateEngine extends BaseFrameworkSystem {
+	// Load traits
+	use IoHandlerTrait;
+
+	// Exception codes for the template engine
+	const EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED   = 0x110;
+	const EXCEPTION_TEMPLATE_CONTAINS_INVALID_VAR = 0x111;
+	const EXCEPTION_INVALID_VIEW_HELPER           = 0x112;
+	const EXCEPTION_VARIABLE_IS_MISSING           = 0x113;
+
+	/**
+	 * HTML template type
+	 */
+	private static $htmlTemplateType = 'invalid';
+
 	/**
 	 * The local path name where all templates and sub folders for special
 	 * templates are stored. We will internally determine the language plus
@@ -89,17 +108,17 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	/**
 	 * The variable stack for the templates
 	 */
-	private $varStack = array();
+	private $varStack = [];
 
 	/**
 	 * Loaded templates for recursive protection and detection
 	 */
-	private $loadedTemplates = array();
+	private $loadedTemplates = [];
 
 	/**
 	 * Compiled templates for recursive protection and detection
 	 */
-	private $compiledTemplates = array();
+	private $compiledTemplates = [];
 
 	/**
 	 * Loaded raw template data
@@ -131,7 +150,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	/**
 	 * Loaded helpers
 	 */
-	private $helpers = array();
+	private $helpers = [];
 
 	/**
 	 * Current variable group
@@ -141,7 +160,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	/**
 	 * All template groups except "general"
 	 */
-	private $variableGroups = array();
+	private $variableGroups = [];
 
 	/**
 	 * Code begin
@@ -158,32 +177,29 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 */
 	private $languageSupport = true;
 
-	/**
-	 * XML compacting is disabled by default
-	 */
-	private $xmlCompacting = false;
-
-	// Exception codes for the template engine
-	const EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED   = 0x110;
-	const EXCEPTION_TEMPLATE_CONTAINS_INVALID_VAR = 0x111;
-	const EXCEPTION_INVALID_VIEW_HELPER           = 0x112;
-	const EXCEPTION_VARIABLE_IS_MISSING           = 0x113;
-
 	/**
 	 * Protected constructor
 	 *
 	 * @param	$className	Name of the class
 	 * @return	void
 	 */
-	protected function __construct ($className) {
+	protected function __construct (string $className) {
 		// Call parent constructor
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: className=%s - CONSTRUCTED!', $className));
 		parent::__construct($className);
 
 		// Init file I/O instance
 		$ioInstance = ObjectFactory::createObjectByConfiguredName('file_io_class');
 
 		// Set it
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: ioInstance=%s', $ioInstance->__toString()));
 		$this->setFileIoInstance($ioInstance);
+
+		// "Cache" config entry
+		self::$htmlTemplateType = FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('html_template_type');
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: self::htmlTemplateType=%s - EXIT!', self::$htmlTemplateType));
 	}
 
 	/**
@@ -193,36 +209,40 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$variableGroup	Optional variable group to look in
 	 * @return	$index			false means not found, >=0 means found on a specific index
 	 */
-	private function getVariableIndex ($variableName, $variableGroup = NULL) {
+	private function getVariableIndex (string $variableName, string $variableGroup = NULL) {
 		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableName=%s,variableGroup[%s]=%s - CALLED!', $variableName, gettype($variableGroup), $variableGroup));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// First everything is not found
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableName=%s', $variableName));
 		$found = false;
 
 		// If the stack is NULL, use the current group
 		if (is_null($variableGroup)) {
 			// Use current group
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.' currGroup=' . $this->currGroup . ' set as stack!');
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: this->currGroup=%s set as stack!', $this->currGroup));
 			$variableGroup = $this->currGroup;
-		} // END - if
+		}
 
 		// Is the group there?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableGroup=%s', $variableGroup));
 		if ($this->isVarStackSet($variableGroup)) {
 			// Now search for it
 			foreach ($this->getVarStack($variableGroup) as $index => $currEntry) {
-				//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.':currGroup=' . $variableGroup . ',idx=' . $index . ',currEntry=' . $currEntry['name'] . ',variableName=' . $variableName);
 				// Is the entry found?
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: index=%d,currGroup=%s,currEntry[name]=%s,variableName=%s', $index, $variableGroup, $currEntry['name'], $variableName));
 				if ($currEntry['name'] == $variableName) {
 					// Found!
-					//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.':FOUND!');
+					/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: index=%d - BREAK!', $index));
 					$found = $index;
 					break;
-				} // END - if
-			} // END - foreach
-		} // END - if
+				}
+			}
+		}
 
 		// Return the current position
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: found=%d - EXIT!', $found));
 		return $found;
 	}
 
@@ -231,13 +251,22 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 *
 	 * @param	$variableGroup	Variable group to check
 	 * @return	$isSet			Whether the given variable group is set
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	protected final function isVarStackSet ($variableGroup) {
+	protected final function isVarStackSet (string $variableGroup) {
+		// Validate parameter
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableGroup=%s - CALLED!', $variableGroup));
+		if (empty($variableGroup)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableGroup" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Check it
-		$isSet = isset($this->varStack[$variableGroup]);
+		$isset = isset($this->varStack[$variableGroup]);
 
 		// Return result
-		return $isSet;
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: isset=%d - EXIT!', intval($isset)));
+		return $isset;
 	}
 
 	/**
@@ -245,8 +274,18 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 *
 	 * @param	$variableGroup	Variable group to check
 	 * @return	$varStack		Found variable group
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public final function getVarStack ($variableGroup) {
+	public final function getVarStack (string $variableGroup) {
+		// Validate parameter
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableGroup=%s - CALLED!', $variableGroup));
+		if (empty($variableGroup)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableGroup" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
+		// Return value
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: this->varStack[%s]()=%d - EXIT!', $variableGroup, count($this->varStack[$variableGroup])));
 		return $this->varStack[$variableGroup];
 	}
 
@@ -256,9 +295,21 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$variableGroup	Variable group to check
 	 * @param	$varStack		Variable stack to check
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	protected final function setVarStack ($variableGroup, array $varStack) {
+	protected final function setVarStack (string $variableGroup, array $varStack) {
+		// Validate parameter
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableGroup=%s,varStack()=%d - CALLED!', $variableGroup, count($varStack)));
+		if (empty($variableGroup)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableGroup" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
+		// Set var stack
 		$this->varStack[$variableGroup]  = $varStack;
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -267,32 +318,46 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$variableName	The variable we are looking for
 	 * @param	$variableGroup	Optional variable group to look in
 	 * @return	$content		Content of the variable or null if not found
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	protected function readVariable ($variableName, $variableGroup = NULL) {
+	protected function readVariable (string $variableName, string $variableGroup = NULL) {
+		// Check parameters
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableName=%s,variableGroup[%s]=%s - CALLED!', $variableName, gettype($variableGroup), $variableGroup));
+		if (empty($variableName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		} elseif (!is_null($variableGroup) && empty($variableGroup)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableGroup" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// First everything is not found
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableName=%s', $variableName));
 		$content = NULL;
 
 		// If the stack is NULL, use the current group
 		if (is_null($variableGroup)) {
 			// Use current group
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.' currGroup=' . $this->currGroup . ' set as stack!');
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: this->currGroup=%s set as stack!', $this->currGroup));
 			$variableGroup = $this->currGroup;
-		} // END - if
+		}
 
 		// Get variable index
 		$found = $this->getVariableIndex($variableName, $variableGroup);
 
 		// Is the variable found?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: found[]=%s', gettype($found)));
 		if ($found !== false) {
 			// Read it
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->getVariableValue(%s,%s) ...', $variableGroup, $found));
 			$content = $this->getVariableValue($variableGroup, $found);
-		} // END - if
+		}
 
 		// Return the current position
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.': variableGroup=' . $variableGroup . ',variableName=' . $variableName . ', content[' . gettype($content) . ']=' . $content);
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: content()=%d - EXIT!', strlen($content)));
 		return $content;
 	}
 
@@ -303,12 +368,17 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$value			Value we want to store in the variable
 	 * @return	void
 	 */
-	private function addVariable ($variableName, $value) {
+	private function addVariable (string $variableName, $value) {
 		// Set general variable group
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableName=%s,value[]=%s - CALLED!', $variableName, gettype($value)));
 		$this->setVariableGroup('general');
 
 		// Add it to the stack
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->addVariableGroup(%s,value[]=%s) ...', $variableName, gettype($value)));
 		$this->addGroupVariable($variableName, $value);
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -318,15 +388,19 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 */
 	private function readCurrentGroup () {
 		// Default is not found
-		$result = array();
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: CALLED!');
+		$result = [];
 
 		// Is the group there?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: this->currGroup=%s', $this->currGroup));
 		if ($this->isVarStackSet($this->currGroup)) {
 			// Then use it
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->getVarStack(%s) ...', $this->currGroup));
 			$result = $this->getVarStack($this->currGroup);
-		} // END - if
+		}
 
 		// Return result
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: result()=%d - EXIT!', count($result)));
 		return $result;
 	}
 
@@ -336,18 +410,29 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$groupName	Name of variable group
 	 * @param	$add		Whether add this group
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function setVariableGroup ($groupName, $add = true) {
+	public function setVariableGroup (string $groupName, bool $add = true) {
+		// Check parameter
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: groupName=%s,add=%d - CALLED!', $groupName, intval($add)));
+		if (empty($groupName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "groupName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Set group name
-		//* DEBIG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.': currGroup=' . $groupName);
 		$this->currGroup = $groupName;
 
 		// Skip group 'general'
 		if (($groupName != 'general') && ($add === true)) {
+			// Mark as 'OK'
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: Marking groupName=%s as OK ...', $groupdName));
 			$this->variableGroups[$groupName] = 'OK';
-		} // END - if
-	}
+		}
 
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
+	}
 
 	/**
 	 * Adds a variable to current group
@@ -355,34 +440,54 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$variableName	Variable to set
 	 * @param	$value			Value to store in variable
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function addGroupVariable ($variableName, $value) {
-		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
+	public function addGroupVariable (string $variableName, $value) {
+		// Check parameter
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableName=%s,value[]=%s - CALLED!', $variableName, gettype($value)));
+		if (empty($variableName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		} elseif (is_object($value) || is_resource($value)) {
+			// Throw an exception
+			throw new InvalidArgumentException(sprintf('value[]=%s is not supported', gettype($value)), FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
 
-		// Debug message
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.': group=' . $this->currGroup . ', variableName=' . $variableName . ', value=' . $value);
+		// Replace all dashes to underscores to match variables with configuration entries
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking StringUtils::convertDashesToUnderscores(%s) ...', $variableName));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// Get current variables in group
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: this->currGroup=%s,variableName=%s,value[]=%s', $this->currGroup, $variableName, gettype($value)));
 		$currVars = $this->readCurrentGroup();
 
 		// Append our variable
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: currVars()=%d - BEFORE!', count($currVars)));
 		array_push($currVars, $this->generateVariableArray($variableName, $value));
 
 		// Add it to the stack
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->setVarStack(%s,currVars()=%d) - AFTER!', $this->currGroup, count($currVars)));
 		$this->setVarStack($this->currGroup, $currVars);
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
 	 * Getter for variable value, throws a NoVariableException if the variable is not found
 	 *
 	 * @param	$variableGroup	Variable group to use
-	 * @param	$index		Index in variable array
-	 * @return	$value		Value to set
+	 * @param	$index	Index in variable array
+	 * @return	$value	Value to set
 	 */
-	private function getVariableValue ($variableGroup, $index) {
+	private function getVariableValue (string $variableGroup, int $index) {
 		// Return it
-		return $this->varStack[$variableGroup][$index]['value'];
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableGroup=%s,index[]=%d - CALLED!', $variableGroup, $index));
+		$value = $this->varStack[$variableGroup][$index]['value'];
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: value[]=%s - EXIT!', gettype($value)));
+		return $value;
 	}
 
 	/**
@@ -391,23 +496,22 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$variableName	The variable we are looking for
 	 * @param	$value			The value we want to store in the variable
 	 * @return	void
-	 * @throws	NoVariableException	If the given variable is not found
 	 */
-	private function modifyVariable ($variableName, $value) {
+	private function modifyVariable (string $variableName, $value) {
 		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableName=%s,value[]=%s - CALLED!', $variableName, gettype($value)));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// Get index for variable
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: this->getVariableIndex(%s) ...', $variableName));
 		$index = $this->getVariableIndex($variableName);
 
-		// Is the variable set?
-		if ($index === false) {
-			// Unset variables cannot be modified
-			throw new NoVariableException(array($this, $variableName, $value), self::EXCEPTION_VARIABLE_IS_MISSING);
-		} // END - if
-
 		// Then modify it
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: this->setVariableValue(%s,%d,value[]=%s) ...', $this->currGroup, $index, gettype($value)));
 		$this->setVariableValue($this->currGroup, $index, $value);
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -418,8 +522,13 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$value		Value to set
 	 * @return	void
 	 */
-	private function setVariableValue ($variableGroup, $index, $value) {
+	private function setVariableValue (string $variableGroup, int $index, $value) {
+		// Set variable
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableGroup=%s,index[]=%d,value[]=%s - CALLED!', $variableGroup, $index, gettype($value)));
 		$this->varStack[$variableGroup][$index]['value'] = $value;
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -431,28 +540,47 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$variableName	Variable to set
 	 * @param	$value			Value to set
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	protected function setVariable ($variableGroup, $variableName, $value) {
+	protected function setVariable (string $variableGroup, string $variableName, $value) {
+		// Check parameters
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableGroup=%s,variableName=%s,value[]=%s - CALLED!', $variableGroup, $variableName, gettype($value)));
+		if (empty($variableGroup)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableGroup" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		} elseif (empty($variableName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// Get index for variable
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: this->getVariableIndex(%s) ...', $variableName));
 		$index = $this->getVariableIndex($variableName);
 
 		// Is the variable set?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: index[]=%s', gettype($index)));
 		if ($index === false) {
 			// Is the stack there?
 			if (!isset($this->varStack[$variableGroup])) {
 				// Then initialize it here
-				$this->varStack[$variableGroup] = array();
-			} // END - if
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: Initializing this->varStack[%s] ...', $variableGroup));
+				$this->varStack[$variableGroup] = [];
+			}
 
 			// Not found, add it
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: Pushing variableGroup=%s,variableName=%s,value[]=%s ...', $variableGroup, $variableName, gettype($value)));
 			array_push($this->varStack[$variableGroup], $this->generateVariableArray($variableName, $value));
 		} else {
 			// Then modify it
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->setVariableValue(%s,%d,value[]=%s) ...', $this->currGroup, $index, gettype($value)));
 			$this->setVariableValue($this->currGroup, $index, $value);
 		}
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -463,17 +591,19 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$value			Value to set
 	 * @return	$varData		Variable data array
 	 */
-	private function generateVariableArray ($variableName, $value) {
+	private function generateVariableArray (string $variableName, $value) {
 		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableName=%s,value[]=%s - CALLED!', $variableName, gettype($value)));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// Generate the temporary array
-		$varData = array(
+		$varData = [
 			'name'  => $variableName,
 			'value' => $value
-		);
+		];
 
 		// And return it
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: varData()=%d - EXIT!', count($varData)));
 		return $varData;
 	}
 
@@ -484,8 +614,8 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$templateType	The current template's type
 	 * @return	void
 	 */
-	protected final function setTemplateType ($templateType) {
-		$this->templateType = (string) $templateType;
+	protected final function setTemplateType (string $templateType) {
+		$this->templateType = $templateType;
 	}
 
 	/**
@@ -522,9 +652,9 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param		$templateBasePath		The relative base path for all templates
 	 * @return	void
 	 */
-	protected final function setTemplateBasePath ($templateBasePath) {
+	protected final function setTemplateBasePath (string $templateBasePath) {
 		// And set it
-		$this->templateBasePath = (string) $templateBasePath;
+		$this->templateBasePath = $templateBasePath;
 	}
 
 	/**
@@ -554,9 +684,9 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 *							templates
 	 * @return	void
 	 */
-	protected final function setRawTemplateExtension ($templateExtension) {
+	protected final function setRawTemplateExtension (string $templateExtension) {
 		// And set it
-		$this->templateExtension = (string) $templateExtension;
+		$this->templateExtension = $templateExtension;
 	}
 
 	/**
@@ -566,9 +696,9 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 *							templates
 	 * @return	void
 	 */
-	protected final function setCodeTemplateExtension ($codeExtension) {
+	protected final function setCodeTemplateExtension (string $codeExtension) {
 		// And set it
-		$this->codeExtension = (string) $codeExtension;
+		$this->codeExtension = $codeExtension;
 	}
 
 	/**
@@ -600,9 +730,9 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 *								templates
 	 * @return	void
 	 */
-	protected final function setCompileOutputPath ($compileOutputPath) {
+	protected final function setCompileOutputPath (string $compileOutputPath) {
 		// And set it
-		$this->compileOutputPath = (string) $compileOutputPath;
+		$this->compileOutputPath = $compileOutputPath;
 	}
 
 	/**
@@ -611,22 +741,40 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$index			Index to unset
 	 * @param	$variableGroup	Variable group (default: currGroup)
 	 * @return	void
-	 */
-	protected final function unsetVariableStackOffset ($index, $variableGroup = NULL) {
+	 * @throws	InvalidArgumentException	If the variable name is left empty
+	 * @throws	BadMethodCallException	If this method was called but combination of variableGroup/index isn't found
+	 */
+	protected final function unsetVariableStackOffset (int $index, string $variableGroup = NULL) {
+		// Check variables
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: index=%d,variableGroup[%s]=%s - CALLED!', $index, gettype($variableGroup), $variableGroup));
+		if ($index < 0) {
+			// Invalid index
+			throw new InvalidArgumentException(sprintf('index=%d is below zero', $index), FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		} elseif (!is_null($variableGroup) && empty($variableGroup)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableGroup" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Is the variable group not set?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableGroup[]=%s', gettype($variableGroup)));
 		if (is_null($variableGroup)) {
 			// Then set it to current
 			$variableGroup = $this->currGroup;
-		} // END - if
+		}
 
 		// Is the entry there?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: Checking variableGroup=%s,index=%d ...', $variableGroup, $index));
 		if (!isset($this->varStack[$variableGroup][$index])) {
 			// Abort here, we need fixing!
-			$this->debugInstance();
-		} // END - if
+			throw new BadMethodCallException(sprintf('variableGroup=%s,index=%d does not exist, but method was invoked', $variableGroup, $index), FrameworkInterface::EXCEPTION_BAD_METHOD_CALL);
+		}
 
 		// Remove it
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: Unsetting variableGroup=%s,index=%d ...', $variableGroup, $index));
 		unset($this->varStack[$variableGroup][$index]);
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -635,11 +783,9 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$rawTemplateData	The raw data from the template
 	 * @return	void
 	 */
-	protected final function setRawTemplateData ($rawTemplateData) {
+	protected final function setRawTemplateData (string $rawTemplateData) {
 		// And store it in this class
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.': ' . strlen($rawTemplateData) . ' Bytes set.');
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(__METHOD__.': ' . $this->currGroup . ' variables: ' . count($this->getVarStack($this->currGroup)) . ', groups=' . count($this->varStack));
-		$this->rawTemplateData = (string) $rawTemplateData;
+		$this->rawTemplateData = $rawTemplateData;
 	}
 
 	/**
@@ -648,19 +794,18 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @return	$rawTemplateData	The raw data from the template
 	 */
 	public final function getRawTemplateData () {
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: ' . strlen($this->rawTemplateData) . ' Bytes read.');
 		return $this->rawTemplateData;
 	}
 
 	/**
 	 * Private setter for compiled templates
 	 *
+	 * @param	$compiledData	Compiled template data
 	 * @return	void
 	 */
-	private final function setCompiledData ($compiledData) {
+	private final function setCompiledData (string $compiledData) {
 		// And store it in this class
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: ' . strlen($compiledData) . ' Bytes set.');
-		$this->compiledData = (string) $compiledData;
+		$this->compiledData = $compiledData;
 	}
 
 	/**
@@ -669,7 +814,6 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @return	$compiledData	Compiled template data
 	 */
 	public final function getCompiledData () {
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: ' . strlen($this->compiledData) . ' Bytes read.');
 		return $this->compiledData;
 	}
 
@@ -679,16 +823,24 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$templateName	The template we shall load
 	 * @param	$extOther	An other extension to use
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 * @throws	FileNotFoundException	If the template was not found
 	 */
-	protected function loadTemplate ($templateName, $extOther = '') {
+	protected function loadTemplate (string $templateName, string $extOther = '') {
+		// Check parameter
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: templateName=%s,extOther=%s - CALLED!', $templateName, $extOther));
+		if (empty($templateName)) {
+			// Throw IAE
+			throw new InvalidArgumentException('Parameter "templateName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Get extension for the template if empty
 		if (empty($extOther)) {
 			// None provided, so get the raw one
 			$ext = $this->getRawTemplateExtension();
 		} else {
 			// Then use it!
-			$ext = (string) $extOther;
+			$ext = $extOther;
 		}
 
 		/*
@@ -696,6 +848,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		 * now entirely done by php_intl. These old thing with language-based
 		 * template paths comes from an older time.
 		 */
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: ext=%s', $ext));
 		$fileInstance = new SplFileInfo(sprintf('%s%s%s%s%s%s',
 			$this->getTemplateBasePath(),
 			$this->getGenericBasePath(),
@@ -706,16 +859,20 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		));
 
 		// First try this
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: fileInstance=%s', $fileInstance->__toString()));
 		try {
 			// Load the raw template data
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->loadRawTemplateData(%s) ...', $fileInstance->__toString()));
 			$this->loadRawTemplateData($fileInstance);
 		} catch (FileNotFoundException $e) {
 			// If we shall load a code-template we need to switch the file extension
-			if (($this->getTemplateType() != $this->getConfigInstance()->getConfigEntry('html_template_type')) && (empty($extOther))) {
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: this->templateType=%s,self::htmlTemplateType=%s,extOther=%s', $this->getTemplateType(), self::$htmlTemplateType, $extOther));
+			if (($this->getTemplateType() != self::$htmlTemplateType) && (empty($extOther))) {
 				// Switch over to the code-template extension and try it again
 				$ext = $this->getCodeTemplateExtension();
 
 				// Try it again...
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->loadTemplate(%s,%s) ...', $templateName, $ex));
 				$this->loadTemplate($templateName, $ext);
 			} else {
 				// Throw it again
@@ -723,6 +880,8 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 			}
 		}
 
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -732,43 +891,50 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @return	void
 	 */
 	private function loadRawTemplateData (SplFileInfo $fileInstance) {
-		// Some debug code to look on the file which is being loaded
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: fileInstance=' . $fileInstance);
-
 		// Load the raw template
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: fileInstance=%s - CALLED!', $fileInstance->__toString()));
 		$rawTemplateData = $this->getFileIoInstance()->loadFileContents($fileInstance);
 
 		// Store the template's contents into this class
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->setRawTemplateData(%d) ...', strlen($rawTemplateData)));
 		$this->setRawTemplateData($rawTemplateData);
 
 		// Remember the template's file instance
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->setLastTemplate(%s) ...', $fileInstance->__toString()));
 		$this->setLastTemplate($fileInstance);
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
 	 * Try to assign an extracted template variable as a "content" or 'config'
 	 * variable.
 	 *
-	 * @param	$variableName		The variable's name (shall be content or config)
+	 * @param	$variableName	The variable's name (shall be content or config)
 	 *							by default
-	 * @param	$variableName	The variable we want to assign
+	 * @param	$configKey	Possible configuration key
 	 * @return	void
 	 */
-	private function assignTemplateVariable ($variableName, $var) {
+	private function assignTemplateVariable (string $variableName, string $configKey = '') {
 		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
-
-		// Debug message
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: variableName=' . $variableName . ',variableName=' . $variableName);
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: variableName=%s,configKey=%s - CALLED!', $variableName, $configKey));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// Is it not a config variable?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableName=%s', $variableName));
 		if ($variableName != 'config') {
 			// Regular template variables
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->assignVariable(%s,"") ...', $variableName));
 			$this->assignVariable($variableName, '');
 		} else {
 			// Configuration variables
-			$this->assignConfigVariable($var);
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->assignConfigVariable(%s,"") ...', $configKey));
+			$this->assignConfigVariable($configKey);
 		}
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -777,30 +943,33 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$rawData	The raw template data we shall analyze
 	 * @return	void
 	 */
-	private function extractVariablesFromRawData ($rawData) {
-		// Cast to string
-		$rawData = (string) $rawData;
-
+	private function extractVariablesFromRawData (string $rawData) {
 		// Search for variables
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: rawData(%d)=%s - CALLED!', strlen($rawData), $rawData));
 		preg_match_all('/\$(\w+)(\[(\w+)\])?/', $rawData, $variableMatches);
 
-		// Debug message
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:rawData(' . strlen($rawData) . ')=' . $rawData . ',variableMatches=' . print_r($variableMatches, true));
-
 		// Did we find some variables?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableMatches[]=%s', gettype($variableMatches)));
 		if ((is_array($variableMatches)) && (count($variableMatches) == 4) && (count($variableMatches[0]) > 0)) {
 			// Initialize all missing variables
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableMatches()=%d', count($variableMatches)));
 			foreach ($variableMatches[3] as $key => $var) {
 				// Variable name
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: key=%s,var=%s', $key, $var));
 				$variableName = $variableMatches[1][$key];
 
 				// Workarround: Do not assign empty variables
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: variableName=%s', $variableName));
 				if (!empty($var)) {
 					// Try to assign it, empty strings are being ignored
+					/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->assignTemplateVariable(%s,%s) ...', $variableName, $var));
 					$this->assignTemplateVariable($variableName, $var);
-				} // END - if
-			} // END - foreach
-		} // END - if
+				}
+			}
+		}
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -819,50 +988,65 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 */
 	private function analyzeTemplate (array $templateMatches) {
 		// Backup raw template data
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: templateMatches()=%d', count($templateMatches)));
 		$backup = $this->getRawTemplateData();
 
 		// Initialize some arrays
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: backup[%s]()=%d,this->loadedRawData[]=%s', gettype($backup), strlen($backup), gettype($this->loadedRawData)));
 		if (is_null($this->loadedRawData)) {
 			// Initialize both
-			$this->loadedRawData = array();
-			$this->rawTemplates = array();
-		} // END - if
+			$this->loadedRawData = [];
+			$this->rawTemplates = [];
+		}
 
 		// Load all requested templates
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: templateMatches[1]()=%d', count($templateMatches[1])));
 		foreach ($templateMatches[1] as $template) {
 			// Load and compile only templates which we have not yet loaded
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: template=%s', $template));
 			// RECURSIVE PROTECTION! BE CAREFUL HERE!
 			if ((!isset($this->loadedRawData[$template])) && (!in_array($template, $this->loadedTemplates))) {
-				// Debug message
-				//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:template=' . $template);
-
 				// Template not found, but maybe variable assigned?
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-TEMPLATE: template=%s not loaded yet', $template));
 				if ($this->getVariableIndex($template) !== false) {
 					// Use that content here
+					/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-TEMPLATE: Assigning this->loadedTemplateData[%s] from variable template=%s ...', $template, $template));
 					$this->loadedRawData[$template] = $this->readVariable($template);
 
 					// Recursive protection:
+					/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-TEMPLATE: Marking template=%s as loaded ...', $template));
 					array_push($this->loadedTemplates, $template);
 				} else {
 					// Then try to search for code-templates
+					/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: template=%s is maybe name of code template?', $template));
 					try {
-						// Load the code template and remember it's contents
+						// Load the code template ...
+						/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->loadCodeTemplate(%s) ...', $template));
 						$this->loadCodeTemplate($template);
+
+						// ... and remember it's contents
+						/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-TEMPLATE: Setting this->loadedRawData[%s] from this->rawTemplateData ...', $template));
 						$this->loadedRawData[$template] = $this->getRawTemplateData();
 
 						// Remember this template for recursion detection
 						// RECURSIVE PROTECTION!
+						/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-TEMPLATE: Marking template=%s as loaded ...', $template));
 						array_push($this->loadedTemplates, $template);
 					} catch (FileNotFoundException $e) {
 						// Even this is not done... :/
+						/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-TEMPLATE: Marking template=%s as loaded ...', $template));
 						array_push($this->rawTemplates, $template);
 					}
 				}
-			} // END - if
-		} // END - foreach
+			}
+		}
 
 		// Restore the raw template data
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->setRawTemplateData(backup()=%d) ...', strlen($backup)));
 		$this->setRawTemplateData($backup);
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -872,32 +1056,43 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$template	The template's name
 	 * @return	void
 	 */
-	private function compileCode ($code, $template) {
+	private function compileCode (string $code, string $template) {
 		// Is this template already compiled?
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: code=%s,template=%s - CALLED!', $code, $template));
 		if (in_array($template, $this->compiledTemplates)) {
 			// Abort here...
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Found template=%s in this->compiledTemplates - EXIT!', $template));
 			return;
-		} // END - if
+		}
 
 		// Remember this template being compiled
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: Adding template=%s to this->compiledTemplates ...', $template));
 		array_push($this->compiledTemplates, $template);
 
 		// Compile the loaded code in five steps:
 		//
 		// 1. Backup current template data
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: this->compiledTemplates()=%d', count($this->compiledTemplates)));
 		$backup = $this->getRawTemplateData();
 
 		// 2. Set the current template's raw data as the new content
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->setRawTemplateData(code()=%d) ... - backup[%s]()=%d', strlen($code), gettype($backup), strlen($backup)));
 		$this->setRawTemplateData($code);
 
 		// 3. Compile the template data
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: Invoking this->compileTemplate() ...');
 		$this->compileTemplate();
 
 		// 4. Remember it's contents
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-TEMPLATE: Setting this->loadedRawData[%s] from this->rawTemplateData ...', $template));
 		$this->loadedRawData[$template] = $this->getRawTemplateData();
 
 		// 5. Restore the previous raw content from backup variable
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: Invoking this->setRawTemplateData(backup()=%d) ...', strlen($backup)));
 		$this->setRawTemplateData($backup);
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -909,24 +1104,30 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 */
 	private function insertAllTemplates (array $templateMatches) {
 		// Run through all loaded codes
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('BASE-TEMPLATE: templateMatches()=%d', count($templateMatches)));
 		foreach ($this->loadedRawData as $template => $code) {
-
 			// Search for the template
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: template=%s,code()=%d', $template, strlen($code)));
 			$foundIndex = array_search($template, $templateMatches[1]);
 
 			// Lookup the matching template replacement
+			/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: foundIndex[%s]=d', gettype($foundIndex), $foundIndex));
 			if (($foundIndex !== false) && (isset($templateMatches[0][$foundIndex]))) {
-
 				// Get the current raw template
 				$rawData = $this->getRawTemplateData();
 
 				// Replace the space holder with the template code
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: rawData()=%s - BEFORE!', strlen($rawData)));
 				$rawData = str_replace($templateMatches[0][$foundIndex], $code, $rawData);
 
 				// Set the new raw data
+				/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugMessage(sprintf('BASE-TEMPLATE: rawData()=%s - AFTER!', strlen($rawData)));
 				$this->setRawTemplateData($rawData);
-			} // END - if
-		} // END - foreach
+			}
+		}
+
+		// Trace message
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('BASE-TEMPLATE: EXIT!');
 	}
 
 	/**
@@ -956,8 +1157,8 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 					// This template was never found. We silently ignore it
 					unset($this->rawTemplates[$key]);
 				}
-			} // END - foreach
-		} // END - if
+			}
+		}
 	}
 
 	/**
@@ -968,22 +1169,20 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @todo	Unfinished work or don't die here.
 	 */
 	private function assignAllVariables (array $varMatches) {
-		// Debug message
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:varMatches()=' . count($varMatches));
-
 		// Search for all variables
+		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:varMatches()=' . count($varMatches));
 		foreach ($varMatches[1] as $key => $var) {
 			// Replace all dashes to underscores to match variables with configuration entries
-			$var = trim(self::convertDashesToUnderscores($var));
+			$var = trim(StringUtils::convertDashesToUnderscores($var));
 
 			// Debug message
-			self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:key=' . $key . ',var=' . $var);
+			self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:key=' . $key . ',var=' . $var);
 
 			// Detect leading equals
 			if (substr($varMatches[2][$key], 0, 1) == '=') {
 				// Remove and cast it
 				$varMatches[2][$key] = (string) substr($varMatches[2][$key], 1);
-			} // END - if
+			}
 
 			// Do we have some quotes left and right side? Then it is free text
 			if ((substr($varMatches[2][$key], 0, 1) == '"') && (substr($varMatches[2][$key], -1, 1) == '"')) {
@@ -993,7 +1192,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 				// @TODO Non-string found so we need some deeper analysis...
 				ApplicationEntryPoint::exitApplication('Deeper analysis not yet implemented!');
 			}
-		} // END - foreach
+		}
 	}
 
 	/**
@@ -1003,22 +1202,20 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @return	void
 	 */
 	private function compileRawTemplateData (array $templateMatches) {
-		// Debug message
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:loadedRawData()= ' .count($this->loadedRawData));
-
 		// Are some code-templates found which we need to compile?
+		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:loadedRawData()= ' .count($this->loadedRawData));
 		if (count($this->loadedRawData) > 0) {
 			// Then compile all!
 			foreach ($this->loadedRawData as $template => $code) {
 				// Debug message
-				//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:template=' . $template . ',code(' . strlen($code) . ')=' . $code);
+				//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:template=' . $template . ',code(' . strlen($code) . ')=' . $code);
 
 				// Is this template already compiled?
 				if (in_array($template, $this->compiledTemplates)) {
 					// Then skip it
-					//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: Template ' . $template . ' already compiled. SKIPPED!');
+					//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: Template ' . $template . ' already compiled. SKIPPED!');
 					continue;
-				} // END - if
+				}
 
 				// Search for the template
 				$foundIndex = array_search($template, $templateMatches[1]);
@@ -1027,19 +1224,19 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 				if (($foundIndex !== false) && (isset($templateMatches[3][$foundIndex]))) {
 					// Split it up with another reg. exp. into variable=value pairs
 					preg_match_all($this->regExpVarValue, $templateMatches[3][$foundIndex], $varMatches);
-					//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:varMatches=' . print_r($varMatches, true));
+					//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:varMatches=' . print_r($varMatches, true));
 
 					// Assign all variables
 					$this->assignAllVariables($varMatches);
-				} // END - if (isset($templateMatches ...
+				}
 
 				// Compile the loaded template
 				$this->compileCode($code, $template);
-			} // END - foreach ($this->loadedRawData ...
+			}
 
 			// Insert all templates
 			$this->insertAllTemplates($templateMatches);
-		} // END - if (count($this->loadedRawData) ...
+		}
 	}
 
 	/**
@@ -1063,18 +1260,11 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	private function finalizeVariableCompilation () {
 		// Get the content
 		$content = $this->getRawTemplateData();
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: content before=' . strlen($content) . ' (' . md5($content) . ')');
-
-		// Do we have the stack?
-		if (!$this->isVarStackSet('general')) {
-			// Abort here silently
-			// @TODO This silent abort should be logged, maybe.
-			return;
-		} // END - if
+		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: content before=' . strlen($content) . ' (' . md5($content) . ')');
 
 		// Walk through all variables
 		foreach ($this->getVarStack('general') as $currEntry) {
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: name=' . $currEntry['name'] . ', value=<pre>' . htmlentities($currEntry['value']) . '</pre>');
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: name=' . $currEntry['name'] . ', value=<pre>' . htmlentities($currEntry['value']) . '</pre>');
 			// Replace all [$var] or {?$var?} with the content
 			// @TODO Old behaviour, will become obsolete!
 			$content = str_replace('$content[' . $currEntry['name'] . ']', $currEntry['value'], $content);
@@ -1084,11 +1274,10 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 
 			// The new behaviour
 			$content = str_replace('{?' . $currEntry['name'] . '?}', $currEntry['value'], $content);
-		} // END - for
-
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: content after=' . strlen($content) . ' (' . md5($content) . ')');
+		}
 
 		// Set the content back
+		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: content after=' . strlen($content) . ' (' . md5($content) . ')');
 		$this->setRawTemplateData($content);
 	}
 
@@ -1098,10 +1287,17 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$template	The web template we shall load which is located in
 	 *						'html' by default
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function loadHtmlTemplate ($template) {
+	public function loadHtmlTemplate (string $template) {
+		// Validate parameter
+		if (empty($template)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "template" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Set template type
-		$this->setTemplateType($this->getConfigInstance()->getConfigEntry('html_template_type'));
+		$this->setTemplateType(self::$htmlTemplateType);
 
 		// Load the special template
 		$this->loadTemplate($template);
@@ -1115,15 +1311,15 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @return	void
 	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public final function assignVariable ($variableName, $value) {
-		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
-
-		// Empty variable found?
+	public final function assignVariable (string $variableName, $value) {
+		// Validate parameter
 		if (empty($variableName)) {
 			// Throw an exception
-			throw new InvalidArgumentException('Parameter "variableName" is empty');
-		} // END - if
+			throw new InvalidArgumentException('Parameter "variableName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
+		// Replace all dashes to underscores to match variables with configuration entries
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// First search for the variable if it was already added
 		$index = $this->getVariableIndex($variableName);
@@ -1131,11 +1327,11 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		// Was it found?
 		if ($index === false) {
 			// Add it to the stack
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:ADD: ' . $variableName . '[' . gettype($value) . ']=' . $value);
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:ADD: ' . $variableName . '[' . gettype($value) . ']=' . $value);
 			$this->addVariable($variableName, $value);
 		} elseif (!empty($value)) {
 			// Modify the stack entry
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:MOD: ' . $variableName . '[' . gettype($value) . ']=' . $value);
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:MOD: ' . $variableName . '[' . gettype($value) . ']=' . $value);
 			$this->modifyVariable($variableName, $value);
 		}
 	}
@@ -1146,17 +1342,27 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$variableName	The variable we are looking for
 	 * @param	$variableGroup	Name of variable group (default: 'general')
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public final function removeVariable ($variableName, $variableGroup = 'general') {
+	public final function removeVariable (string $variableName, string $variableGroup = 'general') {
+		// Validate parameter
+		if (empty($variableName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		} elseif (empty($variableGroup)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableGroup" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// First search for the variable if it was already added
 		$index = $this->getVariableIndex($variableName, $variableGroup);
 
 		// Was it found?
 		if ($index !== false) {
 			// Remove this variable
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:UNSET: variableGroup=' . $variableGroup . ',variableName=' . $variableName . ',index=' . $index);
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:UNSET: variableGroup=' . $variableGroup . ',variableName=' . $variableName . ',index=' . $index);
 			$this->unsetVariableStackOffset($index, $variableGroup);
-		} // END - if
+		}
 	}
 
 	/**
@@ -1165,8 +1371,18 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$templateName	Name of the template we want to assign
 	 * @param	$variableName	Name of the variable we want to assign
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function assignTemplateWithVariable ($templateName, $variableName) {
+	public function assignTemplateWithVariable (string $templateName, string $variableName) {
+		// Validate parameter
+		if (empty($templateName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "templateName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		} elseif (empty($variableName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Get the content from last loaded raw template
 		$content = $this->getRawTemplateData();
 
@@ -1182,14 +1398,21 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 *
 	 * @param	$variableName	The configuration variable we want to assign
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function assignConfigVariable ($variableName) {
+	public function assignConfigVariable (string $variableName) {
+		// Validate parameter
+		if (empty($variableName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "variableName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Replace all dashes to underscores to match variables with configuration entries
-		$variableName = trim(self::convertDashesToUnderscores($variableName));
+		$variableName = trim(StringUtils::convertDashesToUnderscores($variableName));
 
 		// Sweet and simple...
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: variableName=' . $variableName . ',getConfigEntry()=' . $this->getConfigInstance()->getConfigEntry($variableName));
-		$this->assignVariable($variableName, $this->getConfigInstance()->getConfigEntry($variableName));
+		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: variableName=' . $variableName . ',getConfigEntry()=' . FrameworkBootstrap::getConfigurationInstance()->getConfigEntry($variableName));
+		$this->assignVariable($variableName, FrameworkBootstrap::getConfigurationInstance()->getConfigEntry($variableName));
 	}
 
 	/**
@@ -1207,7 +1430,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		foreach ($variables as $name => $value) {
 			// Set variable with name for 'config' group
 			$this->assignVariable($name, $value);
-		} // END - foreach
+		}
 	}
 
 	/**
@@ -1217,7 +1440,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 */
 	public function assignApplicationData () {
 		// Get application instance
-		$applicationInstance = GenericRegistry::getRegistry()->getInstance('application');
+		$applicationInstance = ApplicationHelper::getSelfInstance();
 
 		// Get long name and assign it
 		$this->assignVariable('app_full_name' , $applicationInstance->getAppName());
@@ -1238,10 +1461,17 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$template	The code template we shall load which is
 	 *						located in 'code' by default
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function loadCodeTemplate ($template) {
+	public function loadCodeTemplate (string $template) {
+		// Validate parameter
+		if (empty($template)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "template" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Set template type
-		$this->setTemplateType($this->getConfigInstance()->getConfigEntry('code_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_template_type'));
+		$this->setTemplateType(FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('code_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_template_type'));
 
 		// Load the special template
 		$this->loadTemplate($template);
@@ -1253,10 +1483,17 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$template	The email template we shall load which is
 	 *						located in 'emails' by default
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function loadEmailTemplate ($template) {
+	public function loadEmailTemplate (string $template) {
+		// Validate parameter
+		if (empty($template)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "template" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Set template type
-		$this->setTemplateType($this->getConfigInstance()->getConfigEntry('email_template_type'));
+		$this->setTemplateType(FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('email_template_type'));
 
 		// Load the special template
 		$this->loadTemplate($template);
@@ -1273,9 +1510,9 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		// Do we have the stack?
 		if (!$this->isVarStackSet('general')) {
 			// Abort here silently
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: Aborted, variable stack general not found!');
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: Aborted, variable stack general not found!');
 			return;
-		} // END - if
+		}
 
 		// Iterate through all general variables
 		foreach ($this->getVarStack('general') as $index => $currVariable) {
@@ -1283,21 +1520,21 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 			$value = $this->compileRawCode($this->readVariable($currVariable['name']), true);
 
 			// Debug message
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: name=' . $currVariable['name'] . ',value=' . $value);
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: name=' . $currVariable['name'] . ',value=' . $value);
 
 			// Remove it from stack
 			$this->removeVariable($currVariable['name'], 'general');
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: value='. $value . ',name=' . $currVariable['name'] . ',index=' . $index);
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: value='. $value . ',name=' . $currVariable['name'] . ',index=' . $index);
 
 			// Is it a configuration key?
-			if ($this->getConfigInstance()->isConfigurationEntrySet($value)) {
+			if (FrameworkBootstrap::getConfigurationInstance()->isConfigurationEntrySet($value)) {
 				// The value itself is a configuration entry
 				$this->assignConfigVariable($value);
 			} else {
 				// Re-assign the value directly
 				$this->assignVariable($currVariable['name'], $value);
 			}
-		} // END - foreach
+		}
 	}
 
 	/**
@@ -1308,15 +1545,15 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 */
 	public final function compileVariables () {
 		// Initialize the $content array
-		$validVar = $this->getConfigInstance()->getConfigEntry('tpl_valid_var');
-		$dummy = array();
+		$validVar = FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('tpl_valid_var');
+		$dummy = [];
 
 		// Iterate through all general variables
 		foreach ($this->getVarStack('general') as $currVariable) {
 			// Transfer it's name/value combination to the $content array
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:' . $currVariable['name'] . '=<pre>' . htmlentities($currVariable['value']).'</pre>');
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:' . $currVariable['name'] . '=<pre>' . htmlentities($currVariable['value']).'</pre>');
 			$dummy[$currVariable['name']] = $currVariable['value'];
-		}// END - if
+		}
 
 		// Set the new variable (don't remove the second dollar!)
 		$$validVar = $dummy;
@@ -1353,7 +1590,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 
 				// And put all together
 				$eval = sprintf('%s<%%php %s %%>%s', $evalLeft, $evalMiddle, $evalRight);
-			} // END - while
+			}
 
 			// Prepare PHP code for eval() command
 			$eval = str_replace(
@@ -1375,12 +1612,12 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 
 				// Output backtrace here
 				$this->debugBackTrace();
-			} // END - if
+			}
 
 			// Set raw template data
 			$this->setRawTemplateData($result);
 			$cnt++;
-		} // END - while
+		}
 
 		// Final variable assignment
 		$this->finalizeVariableCompilation();
@@ -1400,13 +1637,13 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 */
 	public function compileTemplate () {
 		// Get code type to make things shorter
-		$codeType = $this->getConfigInstance()->getConfigEntry('code_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_template_type');
+		$codeType = FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('code_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_template_type');
 
 		// We will only work with template type "code" from configuration
 		if (substr($this->getTemplateType(), 0, strlen($codeType)) != $codeType) {
 			// Abort here
-			throw new UnexpectedTemplateTypeException(array($this, $this->getTemplateType(), $this->getConfigInstance()->getConfigEntry('code_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_template_type')), self::EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED);
-		} // END - if
+			throw new UnexpectedTemplateTypeException(array($this, $this->getTemplateType(), FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('code_' . FrameworkBootstrap::getRequestTypeFromSystem() . '_template_type')), self::EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED);
+		}
 
 		// Get the raw data.
 		$rawData = $this->getRawTemplateData();
@@ -1421,7 +1658,7 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		preg_match_all($this->regExpCodeTags, $rawData, $templateMatches);
 
 		// Debug message
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:templateMatches=' . print_r($templateMatches , true));
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:templateMatches=' . print_r($templateMatches , true));
 
 		// Analyze the matches array
 		if ((is_array($templateMatches)) && (count($templateMatches) == 4) && (count($templateMatches[0]) > 0)) {
@@ -1443,8 +1680,8 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 
 				// Remove the raw template content as well
 				$this->setRawTemplateData('');
-			} // END - if
-		} // END - if($templateMatches ...
+			}
+		}
 	}
 
 	/**
@@ -1452,16 +1689,23 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 *
 	 * @param	$helperName		The helper's name
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	protected function loadViewHelper ($helperName) {
+	protected function loadViewHelper (string $helperName) {
+		// Validate parameter
+		if (empty($helperName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "helperName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Is this view helper loaded?
 		if (!isset($this->helpers[$helperName])) {
 			// Create a class name
-			$className = self::convertToClassName($helperName) . 'ViewHelper';
+			$className = StringUtils::convertToClassName($helperName) . 'ViewHelper';
 
 			// Generate new instance
 			$this->helpers[$helperName] = ObjectFactory::createObjectByName($className);
-		} // END - if
+		}
 
 		// Return the requested instance
 		return $this->helpers[$helperName];
@@ -1484,25 +1728,32 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$rawCode			Raw code to compile
 	 * @param	$setMatchAsCode		Sets $match if readVariable() returns empty result
 	 * @return	$rawCode	Compile code with inserted variable value
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function compileRawCode ($rawCode, $setMatchAsCode=false) {
+	public function compileRawCode (string $rawCode, bool $setMatchAsCode = false) {
+		// Validate parameter
+		if (empty($rawCode)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "rawCode" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Find the variables
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:rawCode=<pre>' . htmlentities($rawCode) . '</pre>');
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:rawCode=<pre>' . htmlentities($rawCode) . '</pre>');
 		preg_match_all($this->regExpVarValue, $rawCode, $varMatches);
 
 		// Compile all variables
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:<pre>' . print_r($varMatches, true) . '</pre>');
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:<pre>' . print_r($varMatches, true) . '</pre>');
 		foreach ($varMatches[0] as $match) {
 			// Add variable tags around it
 			$varCode = '{?' . $match . '?}';
 
 			// Debug message
-			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:varCode=' . $varCode);
+			//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:varCode=' . $varCode);
 
 			// Is the variable found in code? (safes some calls)
 			if (strpos($rawCode, $varCode) !== false) {
 				// Debug message
-				//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: match=' . $match . ',rawCode[' . gettype($rawCode) . ']=' . $rawCode);
+				//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: match=' . $match . ',rawCode[' . gettype($rawCode) . ']=' . $rawCode);
 
 				// Use $match as new value or $value from read variable?
 				if ($setMatchAsCode === true) {
@@ -1515,11 +1766,11 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 					// Insert value
 					$rawCode = str_replace($varCode, $value, $rawCode);
 				}
-			} // END - if
-		} // END - foreach
+			}
+		}
 
 		// Return the compiled data
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']:rawCode=<pre>' . htmlentities($rawCode) . '</pre>');
+		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE:rawCode=<pre>' . htmlentities($rawCode) . '</pre>');
 		return $rawCode;
 	}
 
@@ -1538,9 +1789,19 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 	 * @param	$oldName	Old name of variable
 	 * @param	$newName	New name of variable
 	 * @return	void
+	 * @throws	InvalidArgumentException	If the variable name is left empty
 	 */
-	public function renameVariable ($oldName, $newName) {
-		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE[' . __METHOD__ . ':' . __LINE__ . ']: oldName=' . $oldName . ', newName=' . $newName);
+	public function renameVariable (string $oldName, string $newName) {
+		// Validate parameter
+		//* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-TEMPLATE: oldName=' . $oldName . ', newName=' . $newName);
+		if (empty($oldName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "oldName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		} elseif (empty($newName)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "newName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// Get raw template code
 		$rawData = $this->getRawTemplateData();
 
@@ -1551,41 +1812,14 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		$this->setRawTemplateData($rawData);
 	}
 
-	/**
-	 * Renders the given XML content
-	 *
-	 * @param	$content	Valid XML content or if not set the current loaded raw content
-	 * @return	void
-	 * @throws	XmlParserException	If an XML error was found
-	 */
-	public function renderXmlContent ($content = NULL) {
-		// Is the content set?
-		if (is_null($content)) {
-			// Get current content
-			$content = $this->getRawTemplateData();
-		} // END - if
-
-		// Get a XmlParser instance
-		$parserInstance = ObjectFactory::createObjectByConfiguredName('xml_parser_class', array($this));
-
-		// Check if XML compacting is enabled
-		if ($this->isXmlCompactingEnabled()) {
-			// Yes, so get a decorator class for transparent compacting
-			$parserInstance = ObjectFactory::createObjectByConfiguredName('deco_compacting_xml_parser_class', array($parserInstance));
-		} // END - if
-
-		// Parse the XML document
-		$parserInstance->parseXmlContent($content);
-	}
-
 	/**
 	 * Enables or disables language support
 	 *
 	 * @param	$languageSupport	New language support setting
 	 * @return	void
 	 */
-	public final function enableLanguageSupport ($languageSupport = true) {
-		$this->languageSupport = (bool) $languageSupport;
+	public final function enableLanguageSupport (bool $languageSupport = true) {
+		$this->languageSupport = $languageSupport;
 	}
 
 	/**
@@ -1597,32 +1831,19 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 		return $this->languageSupport;
 	}
 
-	/**
-	 * Enables or disables XML compacting
-	 *
-	 * @param	$xmlCompacting	New XML compacting setting
-	 * @return	void
-	 */
-	public final function enableXmlCompacting ($xmlCompacting = true) {
-		$this->xmlCompacting = (bool) $xmlCompacting;
-	}
-
-	/**
-	 * Checks whether XML compacting is enabled
-	 *
-	 * @return	$xmlCompacting	Whether XML compacting is enabled or disabled
-	 */
-	public final function isXmlCompactingEnabled () {
-		return $this->xmlCompacting;
-	}
-
 	/**
 	 * Removes all commentd, tabs and new-line characters to compact the content
 	 *
 	 * @param	$uncompactedContent		The uncompacted content
 	 * @return	$compactedContent		The compacted content
 	 */
-	public function compactContent ($uncompactedContent) {
+	public function compactContent (string $uncompactedContent) {
+		// Validate parameter
+		if (empty($uncompactedContent)) {
+			// Throw an exception
+			throw new InvalidArgumentException('Parameter "uncompactedContent" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
+		}
+
 		// First, remove all tab/new-line/revert characters
 		$compactedContent = str_replace(chr(9), '', str_replace(chr(10), '', str_replace(chr(13), '', $uncompactedContent)));
 
@@ -1635,8 +1856,8 @@ abstract class BaseTemplateEngine extends BaseFrameworkSystem {
 			foreach ($matches[0] as $match) {
 				// Remove the match
 				$compactedContent = str_replace($match, '', $compactedContent);
-			} // END - foreach
-		} // END - if
+			}
+		}
 
 		// Set the content again
 		$this->setRawTemplateData($compactedContent);