File: include/patterns/Multiton.lib

<?php

/*
    Multiton.lib, DomCore, the WebAbility(r) Core System
    Contains the multiton pattern class
    (c) 2008-2012 Philippe Thomassigny

    This file is part of DomCore

    DomCore is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    DomCore is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with DomCore.  If not, see <http://www.gnu.org/licenses/>.
*/

/* @UML_Box -- Do not edit
|------------------------------------------------------------------|
| Multiton : WebAbility single parametered instance pattern class  |
|------------------------------------------------------------------|
| - ::$instance: array(Multiton)                                   |
| - $parameter: mixed                                              |
|------------------------------------------------------------------|
| + new Multiton($parameter: mixed)                                |
| + ::getInstance($parameter: mixed, $class: string)               |
| + __clone()                                                      |
|------------------------------------------------------------------|
@End_UML_Box */


class Multiton extends WAObject
{
  private static $instance = array();
  protected $parameter = null;

  function __construct($parameter)
  {
    if (isset(self::$instance[get_class($this)][$parameter]))
      throw new PatternError(WAMessage::getMessage('Multiton.noclone').get_class($this)."[$parameter]");
    parent::__construct();
    self::$instance[get_class($this)][$parameter] = $this;
    $this->parameter = $parameter;
  }

  public static function getInstance($parameter, $classname = null)
  {
    if (!$classname)
      $classname = get_called_class();
    if (!isset(self::$instance[$classname][$parameter]))
      new $classname($parameter);
    return self::$instance[$classname][$parameter];
  }

  public function __clone()
  {
    throw new PatternError(WAMessage::getMessage('Multiton.noclone').get_class($this)."[$this->parameter]");
  }

}

?>