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73 lines
1.8 KiB
PHP
Executable File
73 lines
1.8 KiB
PHP
Executable File
<?php
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/** @file recursivedualiterator.inc
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* @ingroup Examples
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* @brief class RecursiveDualIterator
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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 Synchronous iteration over two recursive iterators
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* @author Marcus Boerger
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* @version 1.0
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*/
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class RecursiveDualIterator extends DualIterator implements RecursiveIterator
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{
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private $ref;
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/** construct iterator from two RecursiveIterator instances
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*
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* @param lhs Left Hand Side Iterator
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* @param rhs Right Hand Side Iterator
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* @param flags iteration flags
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*/
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function __construct(RecursiveIterator $lhs, RecursiveIterator $rhs,
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$flags = 0x33 /*DualIterator::DEFAULT_FLAGS*/)
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{
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parent::__construct($lhs, $rhs, $flags);
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}
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/** @return whether both LHS and RHS have children
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*/
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function hasChildren()
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{
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return $this->getLHS()->hasChildren() && $this->getRHS()->hasChildren();
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}
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/** @return new RecursiveDualIterator (late binding) for the two inner
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* iterators current children.
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*/
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function getChildren()
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{
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if (empty($this->ref))
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{
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$this->ref = new ReflectionClass($this);
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}
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return $this->ref->newInstance(
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$this->getLHS()->getChildren(), $this->getRHS()->getChildren(), $this->getFlags());
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}
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/** @return whether both inner iterators are valid, have same hasChildren()
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* state and identical 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->getLHS()->hasChildren() === $this->getRHS()->hasChildren()
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&& parent::areIdentical();
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}
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/** @return whether both inner iterators are valid, have same hasChildren()
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* state and equal current and key values or both are invalid.
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*/
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function areEqual()
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{
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return $this->getLHS()->hasChildren() === $this->getRHS()->hasChildren()
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&& parent::areEqual();
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}
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}
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?>
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