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<?php |
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/** |
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* Xyster Framework |
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* |
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* LICENSE |
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* |
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* This source file is subject to the new BSD license that is bundled |
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* with this package in the file LICENSE.txt. |
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* It is also available through the world-wide-web at this URL: |
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* http://www.opensource.org/licenses/bsd-license.php |
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* If you did not receive a copy of the license and are unable to |
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* obtain it through the world-wide-web, please send an email |
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* to xyster@devweblog.org so we can send you a copy immediately. |
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* |
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* @category Xyster |
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* @package Xyster_Collection |
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* @copyright Copyright (c) 2007 Irrational Logic (http://devweblog.org) |
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* @license http://www.opensource.org/licenses/bsd-license.php New BSD License |
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*/ |
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/** |
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* @see Xyster_Collection |
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*/ |
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require_once 'Xyster/Collection.php'; |
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/** |
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* @see Xyster_Collection_Set_Interface |
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*/ |
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require_once 'Xyster/Collection/Set/Interface.php'; |
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/** |
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* Simple implementation of the no-duplicate collection |
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* |
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* @category Xyster |
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* @package Xyster_Collection |
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* @copyright Copyright (c) 2007 Irrational Logic (http://devweblog.org) |
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* @license http://www.opensource.org/licenses/bsd-license.php New BSD License |
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*/ |
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class Xyster_Collection_Set extends Xyster_Collection implements Xyster_Collection_Set_Interface |
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{ |
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/** |
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* Creates a new set |
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* |
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* @param Xyster_Collection_Interface $set The values to add to this set |
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* @param boolean $immutable Whether the set can be changed |
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*/ |
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public function __construct( Xyster_Collection_Interface $c = null, $immutable = false ) |
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{ |
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parent::__construct($c, $immutable); |
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} |
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|
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/** |
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* Adds an item to the set |
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* |
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* This collection doesn't accept duplicate values, and will return false |
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* if the provided value is already in the collection. |
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* |
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* @param mixed $item The item to add |
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* @return boolean Whether the set changed as a result of this method |
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* @throws Xyster_Collection_Exception if the collection cannot be modified |
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*/ |
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public function add( $item ) |
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{ |
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if ( !$this->contains($item) ) { |
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return parent::add($item); |
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} return false; |
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} |
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} |
