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62 lines
1.8 KiB
PHP
Executable File
62 lines
1.8 KiB
PHP
Executable File
<?php
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/** @file recursivefilteriterator.inc
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* @ingroup SPL
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* @brief class RecursiveFilterIterator
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* @author Marcus Boerger
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* @date 2003 - 2009
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*
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* SPL - Standard PHP Library
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*/
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/** @ingroup SPL
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* @brief Iterator to filter recursive iterators
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* @author Marcus Boerger
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* @version 1.0
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* @since PHP 5.1
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*
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* Passes the RecursiveIterator interface to the inner Iterator and provides
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* the same functionality as FilterIterator. This allows you to skip parents
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* and all their childs before loading them all. You need to care about
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* function getChildren() because it may not always suit your needs. The
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* builtin behavior uses reflection to return a new instance of the exact same
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* class it is called from. That is you extend RecursiveFilterIterator and
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* getChildren() will create instance of that class. The problem is that doing
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* this does not transport any state or control information of your accept()
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* implementation to the new instance. To overcome this problem you might
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* need to overwrite getChildren(), call this implementation and pass the
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* control vaules manually.
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*/
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abstract class RecursiveFilterIterator extends FilterIterator implements RecursiveIterator
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{
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/** @param $it the RecursiveIterator to filter
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*/
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function __construct(RecursiveIterator $it)
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{
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parent::__construct($it);
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}
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/** @return whether the current element has children
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*/
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function hasChildren()
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{
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return $this->getInnerIterator()->hasChildren();
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}
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/** @return an iterator for the current elements children
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*
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* @note the returned iterator will be of the same class as $this
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*/
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function getChildren()
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{
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if (empty($this->ref))
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{
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$this->ref = new ReflectionClass($this);
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}
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return $this->ref->newInstance($this->getInnerIterator()->getChildren());
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}
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private $ref;
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}
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?>
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