Imported from /home/lorry/working-area/delta_php2/php-5.4.13.tar.bz2.HEADphp-5.4.13master

1 files changed, 72 insertions, 0 deletions

diff --git a/ext/spl/examples/recursivedualiterator.inc b/ext/spl/examples/recursivedualiterator.inc
new file mode 100644
index 0000000..cfa3bcc
--- /dev/null
+++ b/ext/spl/examples/recursivedualiterator.inc
@@ -0,0 +1,72 @@
+<?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();
+	}
+}
+
+?>