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<?php
/** @file recursivecomparedualiterator.inc
* @ingroup Examples
* @brief class DualIterator
* @author Marcus Boerger
* @date 2003 - 2006
*
* SPL - Standard PHP Library
*/
/** @ingroup Examples
* @brief Recursive comparison iterator for a RecursiveDualIterator
* @author Marcus Boerger
* @version 1.0
*/
class RecursiveCompareDualIterator extends RecursiveIteratorIterator
{
/** Used to keep end of recursion equality. That is en leaving a nesting
* level we need to check whether both child iterators are at their end.
*/
protected $equal = false;
/** Construct from RecursiveDualIterator
*
* @param $it RecursiveDualIterator
* @param $mode should be LEAVES_ONLY
* @param $flags should be 0
*/
function __construct(RecursiveDualIterator $it, $mode = self::LEAVES_ONLY, $flags = 0)
{
parent::__construct($it);
}
/** Rewind iteration andcomparison process. Starting with $equal = true.
*/
function rewind()
{
$this->equal = true;
parent::rewind();
}
/** Calculate $equal
* @see $equal
*/
function endChildren()
{
$this->equal &= !$this->getInnerIterator()->getLHS()->valid()
&& !$this->getInnerIterator()->getRHS()->valid();
}
/** @return whether both inner iterators are valid and have identical
* current and key values or both are non valid.
*/
function areIdentical()
{
return $this->equal && $this->getInnerIterator()->areIdentical();
}
/** @return whether both inner iterators are valid and have equal current
* and key values or both are non valid.
*/
function areEqual()
{
return $this->equal && $this->getInnerIterator()->areEqual();
}
}
?>