- Add new example

ext/spl/examples/recursivetreeiterator.inc

@@ -0,0 +1,48 @@
+<?php
+
+/** @file recursivetreeiterator.inc
+ * @ingroup Examples
+ * @brief   class RecursiveTreeIterator
+ * @author  Marcus Boerger, Johannes Schlueter
+ * @date    2005
+ *
+ * SPL - Standard PHP Library
+ */
+
+
+/** @ingroup Examples
+ * @brief   RecursiveIteratorIterator to generate ASCII graphic trees for the
+ *          entries in a RecursiveIterator
+ * @author  Marcus Boerger, Johannes Schlueter
+ * @version 1.0
+ */
+class RecursiveTreeIterator extends RecursiveIteratorIterator
+{
+	private $callToString;
+	
+	function __construct(RecursiveIterator $it, $cit_flags = CachingIterator::CATCH_GET_CHILD)
+	{
+		parent::__construct(new RecursiveCachingIterator($it, $cit_flags), 1);
+		$this->callToString = (bool)($cit_flags & CachingIterator::CALL_TOSTRING);
+	}
+
+	/** @return the current element prefixed with ASCII graphics
+	 */
+	function current()
+	{
+		$tree = '';
+		for ($l=0; $l < $this->getDepth(); $l++) {
+			$tree .= $this->getSubIterator($l)->hasNext() ? '| ' : '  ';
+		}
+		
+		return $tree . ($this->getSubIterator($l)->hasNext() ? '|-' : '\-')
+		       . ($this->callToString ? $this->getSubIterator($l)->__toString() : $this->getSubIterator($l)->current());
+	}
+
+	/** Aggregates the inner iterator
+	 */
+	function __call($func, $params)
+	{
+		return call_user_func_array(array($this->getSubIterator(), $func), $params);
+	}
+}