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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 (c) 2007-2008 Irrational Logic (http://irrationallogic.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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/** |
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* @see Xyster_Collection_Map_Interface |
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*/ |
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require_once 'Xyster/Collection/Map/Interface.php'; |
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/** |
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* Abstract class for key-based collections |
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* |
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* @category Xyster |
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* @package Xyster_Collection |
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* @copyright Copyright (c) 2007-2008 Irrational Logic (http://irrationallogic.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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abstract class Xyster_Collection_Map_Abstract implements Xyster_Collection_Map_Interface |
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{ |
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/** |
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* Tests to see whether the map contains the key supplied |
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* |
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* If the supplied value is an object, and the map allows objects as keys, |
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* the comparison will be done for identity (===) and not for value (==). |
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* |
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* This method is an alias to ArrayAccess::offsetExists |
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* |
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* @param mixed $key The key to test |
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* @return boolean Whether the map contains the supplied key |
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*/ |
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public function containsKey( $key ) |
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{ |
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return $this->offsetExists($key); |
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} |
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/** |
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* Tests to see whether the map contains the value supplied |
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* |
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* If the supplied value is an object, the comparison will be done for |
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* identity (===) and not for value (==). |
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* |
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* @param mixed $item The item to test |
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* @return boolean Whether the map contains the supplied value |
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*/ |
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public function containsValue( $item ) |
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{ |
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foreach( $this->values() as $value ) { |
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if ( $item === $value ) { |
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return true; |
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} |
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} |
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return false; |
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} |
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|
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/** |
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* Gets the value corresponding to the supplied key |
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* |
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* This method could return null if the value is null, or if the value was |
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* not found. Use {@link containsValue} to check which is true. |
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* |
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* @param mixed $key |
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* @return mixed The value found, or null if none |
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*/ |
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public function get( $key ) |
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{ |
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return $this->offsetGet($key); |
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} |
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/** |
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* Tests to see if the collection contains no elements |
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* |
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* The return value from this method should be equivalent to |
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* <code>( $collection->count() == 0 )</code>. |
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* |
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* @return boolean Whether this collection has no elements |
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*/ |
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public function isEmpty() |
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{ |
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return $this->count() == 0; |
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} |
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|
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/** |
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* Combines this map with the supplied map |
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* |
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* The values in the supplied map will take precedence if this map and the |
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* supplied map have duplicate keys. |
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* |
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* @param Xyster_Map_Interface $map |
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* @return boolean Whether the map changed as a result of this method |
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*/ |
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public function merge( Xyster_Collection_Map_Interface $map ) |
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{ |
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$changed = false; |
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foreach( $map as $key=>$value ) { |
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if ( $value instanceof Xyster_Collection_Map_Entry ) { |
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if ( !$changed && $this->get($value->getKey()) !== $value->getValue() ) { |
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$changed = true; |
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} |
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$this->set($value->getKey(), $value->getValue()); |
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} else { |
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if ( !$changed && $this->get($key) !== $value ) { |
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$changed = true; |
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} |
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$this->set($key, $value); |
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} |
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} |
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return $changed; |
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} |
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|
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/** |
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* Removes the mapping for the specified key |
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* |
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* This method is an alias to ArrayAccess::offsetUnset |
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* |
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* @param mixed $key |
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*/ |
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public function remove( $key ) |
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{ |
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$this->offsetUnset($key); |
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} |
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|
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/** |
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* Sets a mapping for the key and value supplied |
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* |
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* This method is an alias to ArrayAccess::offsetSet |
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* |
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* @param mixed $key |
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* @param mixed $value |
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*/ |
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public function set( $key, $value ) |
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{ |
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$this->offsetSet($key,$value); |
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} |
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} |
