framework/main/classes/registry/object/class_ObjectRegistry.php

   1 <?php
   2 // Own namespace
   3 namespace Org\Mxchange\CoreFramework\Registry\Object;
   4
   5 // Import framework stuff
   6 use Org\Mxchange\CoreFramework\Generic\NullPointerException;
   7 use Org\Mxchange\CoreFramework\Registry\BaseRegistry;
   8 use Org\Mxchange\CoreFramework\Registry\Registerable;
   9
  10 // Import SPL stuff
  11 use \InvalidArgumentException;
  12
  13 /**
  14  * A registry for several data types and objects. Objects should be added by
  15  * addInstance() and therefore must implement the interface Registerable.
  16  *
  17  * @author              Roland Haeder <webmaster@shipsimu.org>
  18  * @version             0.0.0
  19  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2023 Core Developer Team
  20  * @license             GNU GPL 3.0 or any newer version
  21  * @link                http://www.shipsimu.org
  22  *
  23  * This program is free software: you can redistribute it and/or modify
  24  * it under the terms of the GNU General Public License as published by
  25  * the Free Software Foundation, either version 3 of the License, or
  26  * (at your option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful,
  29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  31  * GNU General Public License for more details.
  32  *
  33  * You should have received a copy of the GNU General Public License
  34  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  35  */
  36 class ObjectRegistry extends BaseRegistry implements ObjectRegister {
  37         /**
  38          * Instance of this class
  39          */
  40         private static $registryInstance = NULL;
  41
  42         /**
  43          * Protected constructor
  44          *
  45          * @return      void
  46          */
  47         private function __construct () {
  48                 // Call parent constructor
  49                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('OBJECT-REGISTRY: CONSTRUCTED!');
  50                 parent::__construct(__CLASS__);
  51
  52                 // Init own array
  53                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('OBJECT-REGISTRY: Invoking this->initGenericArrayGroup(registry,instance) ...');
  54                 $this->initGenericArrayGroup('registry', 'instance');
  55
  56                 // Trace message
  57                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('OBJECT-REGISTRY: EXIT!');
  58         }
  59
  60         /**
  61          * Singleton getter for self instance. This class has no factory pattern
  62          * because here is no need for special parameters.
  63          *
  64          * @return      $registryInstance       Instance of this class
  65          */
  66         public static final function getRegistry () {
  67                 // Is an instance there?
  68                 if (is_null(self::$registryInstance)) {
  69                         // Not yet, so create one
  70                         self::$registryInstance = new ObjectRegistry();
  71                 }
  72
  73                 // Return the instance
  74                 return self::$registryInstance;
  75         }
  76
  77         /**
  78          * Checks whether an instance key was found
  79          *
  80          * @param       $instanceKey    The key holding an instance in registry
  81          * @return      $exists                 Whether the key exists in registry
  82          * @throws      InvalidArgumentException        If a paramter has an invalid value
  83          */
  84         public function instanceExists (string $instanceKey) {
  85                 // Check parameter
  86                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: instanceKey=%s - CALLED!', $instanceKey));
  87                 if (empty($instanceKey)) {
  88                         // Throw IAE
  89                         throw new InvalidArgumentException('Parameter "instanceKey" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
  90                 }
  91
  92                 // Does this key exists?
  93                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: Invoking this->isGenericArrayKeySet(registry, instance, %s) ...', $instanceKey));
  94                 $exists = $this->isGenericArrayKeySet('registry', 'instance', $instanceKey);
  95
  96                 // Return the result
  97                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: exists=%d - EXIT!', intval($exists)));
  98                 return $exists;
  99         }
 100
 101         /**
 102          * Getter for whole instance registry
 103          *
 104          * @return      $instanceRegistry       The whole instance registry array
 105          */
 106         public final function getInstanceRegistry () {
 107                 return $this->getGenericSubArray('registry', 'instance');
 108         }
 109
 110         /**
 111          * Adds/overwrites a new instance to the registry at the given key
 112          *
 113          * @param       $instanceKey            The key to identify the instance
 114          * @param       $objectInstance         An instance we shall store
 115          * @return      void
 116          * @throws      InvalidArgumentException        If a paramter has an invalid value
 117          */
 118         public function addInstance (string $instanceKey, Registerable $objectInstance) {
 119                 // Check parameter
 120                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: instanceKey=%s,objectInstance=%s - CALLED!', $instanceKey, $objectInstance->__toString()));
 121                 if (empty($instanceKey)) {
 122                         // Throw IAE
 123                         throw new InvalidArgumentExeption('Parameter "instanceKey" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
 124                 }
 125
 126                 // Set entry in generic array
 127                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: Invoking this->setGenericArrayKey(registry,instance,%s,%s) ...', $instanceKey, $objectInstance->__toString()));
 128                 $this->setGenericArrayKey('registry', 'instance', $instanceKey, $objectInstance);
 129
 130                 // Trace message
 131                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage('OBJECT-REGISTRY: EXIT!');
 132         }
 133
 134         /**
 135          * Gets a registered instance or null if not found
 136          *
 137          * @param       $instanceKey            The key to identify the instance
 138          * @return      $objectInstance         An instance we shall store
 139          * @throws      InvalidArgumentException        If a paramter has an invalid value
 140          * @throws      NullPointerException    If the requested key is not found
 141          */
 142         public function getInstance (string $instanceKey) {
 143                 // Check parameter
 144                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: instanceKey=%s - CALLED!', $instanceKey));
 145                 if (empty($instanceKey)) {
 146                         // Throw IAE
 147                         throw new InvalidArgumentException('Parameter "instanceKey" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
 148                 }
 149
 150                 // Is the instance there?
 151                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: Invoking this->instanceExists(%s) ...', $instanceKey));
 152                 if (!$this->instanceExists($instanceKey)) {
 153                         // This might happen if a non-registered key was requested
 154                         throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
 155                 }
 156
 157                 // Get the instance
 158                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: Invoking this->getGenericArrayKey(registry,instance,%s) ...', $instanceKey));
 159                 $objectInstance = $this->getGenericArrayKey('registry', 'instance', $instanceKey);
 160
 161                 // Return the result
 162                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->traceMessage(sprintf('OBJECT-REGISTRY: objectInstance=%s - EXIT!', $objectInstance->__toString()));
 163                 return $objectInstance;
 164         }
 165
 166 }