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<?php |
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/** |
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* Xyster Framework |
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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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* |
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* @category Xyster |
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* @package Xyster_Collection |
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* @copyright Copyright LibreWorks, LLC (http://libreworks.net) |
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* @license http://www.opensource.org/licenses/bsd-license.php New BSD License |
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* @version $Id$ |
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*/ |
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namespace Xyster\Collection; |
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/** |
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* Implementation of AbstractCollection with static helper methods |
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* |
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* @category Xyster |
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* @package Xyster_Collection |
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* @copyright Copyright LibreWorks, LLC (http://libreworks.net) |
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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 Collection extends AbstractCollection |
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{ |
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/** |
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* @var EmptyList |
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*/ |
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static private $_emptyList = null; |
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|
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/** |
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* Creates a new simple collection |
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* |
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* @param ICollection $collection |
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* @param boolean $immutable |
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*/ |
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public function __construct(ICollection $collection = null) |
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{ |
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if ($collection) { |
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$this->merge($collection); |
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} |
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} |
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/** |
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* Gets an immutable, empty list |
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* |
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* @return IList |
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*/ |
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static public function emptyList() |
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{ |
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if (self::$_emptyList === null) { |
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self::$_emptyList = new EmptyList; |
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} |
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return self::$_emptyList; |
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} |
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/** |
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* Returns a new unchangable collection containing all the supplied values |
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* |
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* @param ICollection $collection |
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* @return ICollection |
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*/ |
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static public function fixedCollection(ICollection $collection) |
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{ |
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return new FixedCollection($collection); |
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} |
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|
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/** |
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* Returns a new unchangable list containing all the supplied values |
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* |
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* @param IList $list |
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* @return IList |
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*/ |
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static public function fixedList(IList $list) |
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{ |
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return new FixedList($list); |
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} |
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/** |
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* Returns a new unchangable map containing all the supplied key/value pairs |
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* |
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* @param IMap $map |
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* @return IMap |
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*/ |
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static public function fixedMap(IMap $map) |
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{ |
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return new FixedMap($map); |
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} |
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|
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/** |
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* Returns a new unchangable set containing all the supplied values |
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* |
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* @param ISet $set |
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* @return ISet |
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*/ |
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static public function fixedSet(ISet $set) |
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{ |
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return new FixedSet($set); |
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} |
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/** |
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* Creates a new collection containing the values |
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* |
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* @param array $values |
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* @param boolean $immutable |
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* @return ICollection |
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*/ |
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static public function using(array $values, $immutable = false) |
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{ |
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$collection = new self; |
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$collection->_items = array_values($values); |
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return $immutable ? self::fixedCollection($collection) : $collection; |
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} |
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} |
