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70 lines
1.6 KiB
PHP
Executable File
70 lines
1.6 KiB
PHP
Executable File
<?php
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/** @file recursivecomparedualiterator.inc
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* @ingroup Examples
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* @brief class DualIterator
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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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/** @ingroup Examples
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* @brief Recursive comparison iterator for a RecursiveDualIterator
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* @author Marcus Boerger
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* @version 1.0
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*/
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class RecursiveCompareDualIterator extends RecursiveIteratorIterator
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{
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/** Used to keep end of recursion equality. That is en leaving a nesting
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* level we need to check whether both child iterators are at their end.
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*/
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protected $equal = false;
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/** Construct from RecursiveDualIterator
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*
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* @param $it RecursiveDualIterator
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* @param $mode should be LEAVES_ONLY
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* @param $flags should be 0
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*/
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function __construct(RecursiveDualIterator $it, $mode = self::LEAVES_ONLY, $flags = 0)
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{
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parent::__construct($it);
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}
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/** Rewind iteration andcomparison process. Starting with $equal = true.
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*/
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function rewind()
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{
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$this->equal = true;
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parent::rewind();
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}
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/** Calculate $equal
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* @see $equal
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*/
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function endChildren()
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{
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$this->equal &= !$this->getInnerIterator()->getLHS()->valid()
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&& !$this->getInnerIterator()->getRHS()->valid();
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}
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/** @return whether both inner iterators are valid and have identical
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* current and key values or both are non valid.
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*/
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function areIdentical()
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{
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return $this->equal && $this->getInnerIterator()->areIdentical();
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}
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/** @return whether both inner iterators are valid and have equal current
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* and key values or both are non valid.
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*/
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function areEqual()
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{
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return $this->equal && $this->getInnerIterator()->areEqual();
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}
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}
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?>
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