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<?php /** @file recursivedualiterator.inc * @ingroup Examples * @brief class RecursiveDualIterator * @author Marcus Boerger * @date 2003 - 2006 * * SPL - Standard PHP Library */ /** @ingroup Examples * @brief Synchronous iteration over two recursive iterators * @author Marcus Boerger * @version 1.0 */ class RecursiveDualIterator extends DualIterator implements RecursiveIterator { private $ref; /** construct iterator from two RecursiveIterator instances * * @param lhs Left Hand Side Iterator * @param rhs Right Hand Side Iterator * @param flags iteration flags */ function __construct(RecursiveIterator $lhs, RecursiveIterator $rhs, $flags = 0x33 /*DualIterator::DEFAULT_FLAGS*/) { parent::__construct($lhs, $rhs, $flags); } /** @return whether both LHS and RHS have children */ function hasChildren() { return $this->getLHS()->hasChildren() && $this->getRHS()->hasChildren(); } /** @return new RecursiveDualIterator (late binding) for the two inner * iterators current children. */ function getChildren() { if (empty($this->ref)) { $this->ref = new ReflectionClass($this); } return $this->ref->newInstance( $this->getLHS()->getChildren(), $this->getRHS()->getChildren(), $this->getFlags()); } /** @return whether both inner iterators are valid, have same hasChildren() * state and identical current and key values or both are non valid. */ function areIdentical() { return $this->getLHS()->hasChildren() === $this->getRHS()->hasChildren() && parent::areIdentical(); } /** @return whether both inner iterators are valid, have same hasChildren() * state and equal current and key values or both are invalid. */ function areEqual() { return $this->getLHS()->hasChildren() === $this->getRHS()->hasChildren() && parent::areEqual(); } } ?>