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99 lines
2.1 KiB
PHP
Executable File
99 lines
2.1 KiB
PHP
Executable File
<?php
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/** @file recursivecachingiterator.inc
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* @ingroup SPL
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* @brief class RecursiveCachingIterator
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* @author Marcus Boerger
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* @date 2003 - 2006
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*
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* SPL - Standard PHP Library
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*/
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/**
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* @brief Cached recursive iteration over another Iterator
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* @author Marcus Boerger
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* @version 1.2
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* @since PHP 5.1
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*
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* @see CachingIterator
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*/
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class RecursiveCachingIterator extends CachingIterator implements RecursiveIterator
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{
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private $hasChildren;
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private $getChildren;
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/** Construct from another iterator
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*
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* @param it Iterator to cache
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* @param flags Bitmask:
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* - CALL_TOSTRING (whether to call __toString() for every element)
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* - CATCH_GET_CHILD (whether to catch exceptions when trying to get childs)
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*/
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function __construct(RecursiveIterator $it, $flags = self::CALL_TOSTRING)
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{
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parent::__construct($it, $flags);
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}
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/** Rewind Iterator
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*/
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function rewind();
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{
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$this->hasChildren = false;
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$this->getChildren = NULL;
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parent::rewind();
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}
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/** Forward to next element if necessary then an Iterator for the Children
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* will be created.
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*/
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function next()
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{
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if ($this->hasChildren = $this->it->hasChildren())
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{
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try
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{
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$child = $this->it->getChildren();
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if (!$this->ref)
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{
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$this->ref = new ReflectionClass($this);
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}
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$this->getChildren = $ref->newInstance($child, $this->flags);
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}
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catch(Exception $e)
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{
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if (!$this->flags & self::CATCH_GET_CHILD)
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{
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throw $e;
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}
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$this->hasChildren = false;
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$this->getChildren = NULL;
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}
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} else
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{
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$this->getChildren = NULL;
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}
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parent::next();
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}
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private $ref;
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/** @return whether the current element has children
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* @note The check whether the Iterator for the children can be created was
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* already executed. Hence when flag CATCH_GET_CHILD was given in
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* constructor this fucntion returns false so that getChildren does
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* not try to access those children.
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*/
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function hasChildren()
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{
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return $this->hasChildren;
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}
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/** @return An Iterator for the children
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*/
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function getChildren()
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{
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return $this->getChildren;
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}
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}
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?>
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