<?php /** * TAttributeCollection classes * * @author Qiang Xue <qiang.xue@gmail.com> * @link http://www.pradosoft.com/ * @copyright Copyright © 2005 PradoSoft * @license http://www.pradosoft.com/license/ * @version $Id$ * @package System.Collections */ /** * Includes TMap class */ Prado::using('System.Collections.TMap'); /** * TAttributeCollection class * * TAttributeCollection implements a collection for storing attribute names and values. * * Besides all functionalities provided by {@link TMap}, TAttributeCollection * allows you to get and set attribute values like getting and setting * properties. For example, the following usages are all valid for a * TAttributeCollection object: * <code> * $collection->Text='text'; * echo $collection->Text; * </code> * They are equivalent to the following: * <code> * $collection->add('Text','text'); * echo $collection->itemAt('Text'); * </code> * * Note, attribute names are case-insensitive. They are converted to lower-case * in the collection storage. * * @author Qiang Xue <qiang.xue@gmail.com> * @version $Id$ * @package System.Collections * @since 3.0 */ class TAttributeCollection extends TMap { /** * Returns a property value or an event handler list by property or event name. * This method overrides the parent implementation by returning * a key value if the key exists in the collection. * @param string the property name or the event name * @return mixed the property value or the event handler list * @throws TInvalidOperationException if the property/event is not defined. */ public function __get($name) { return $this->contains($name)?$this->itemAt($name):parent::__get($name); } /** * Sets value of a component property. * This method overrides the parent implementation by adding a new key value * to the collection. * @param string the property name or event name * @param mixed the property value or event handler * @throws TInvalidOperationException If the property is not defined or read-only. */ public function __set($name,$value) { $this->add($name,$value); } /** * Returns the item with the specified key. * This overrides the parent implementation by converting the key to lower case first. * @param mixed the key * @return mixed the element at the offset, null if no element is found at the offset */ public function itemAt($key) { return parent::itemAt(strtolower($key)); } /** * Adds an item into the map. * This overrides the parent implementation by converting the key to lower case first. * @param mixed key * @param mixed value */ public function add($key,$value) { parent::add(strtolower($key),$value); } /** * Removes an item from the map by its key. * This overrides the parent implementation by converting the key to lower case first. * @param mixed the key of the item to be removed * @return mixed the removed value, null if no such key exists. */ public function remove($key) { return parent::remove(strtolower($key)); } /** * Returns whether the specified is in the map. * This overrides the parent implementation by converting the key to lower case first. * @param mixed the key * @return boolean whether the map contains an item with the specified key */ public function contains($key) { return parent::contains(strtolower($key)); } /** * Determines whether a property is defined. * This method overrides parent implementation by returning true * if the collection contains the named key. * @param string the property name * @return boolean whether the property is defined */ public function hasProperty($name) { return $this->contains($name) || parent::hasProperty($name); } /** * Determines whether a property can be read. * This method overrides parent implementation by returning true * if the collection contains the named key. * @param string the property name * @return boolean whether the property can be read */ public function canGetProperty($name) { return $this->contains($name) || parent::canGetProperty($name); } /** * Determines whether a property can be set. * This method overrides parent implementation by always returning true * because you can always add a new value to the collection. * @param string the property name * @return boolean true */ public function canSetProperty($name) { return true; } } ?>