X-Git-Url: http://git.polytechnique.org/?a=blobdiff_plain;f=classes%2Fpliteratorutils.php;h=875aac70cd4707747e4d1a3c5f71d61d69db66fc;hb=4c603b95edc398a28dd8ea01d756ca14f01f95e5;hp=c9bf046b9364c24f78b3f66f9c15f371f970d0b3;hpb=a797e4f7daf5fbcc9b12f64c298e9aa4df0f0acc;p=platal.git

diff --git a/classes/pliteratorutils.php b/classes/pliteratorutils.php
index c9bf046..875aac7 100644
--- a/classes/pliteratorutils.php
+++ b/classes/pliteratorutils.php
@@ -135,6 +135,13 @@ class PlIteratorUtils
         $callback = new _GetObjectPropertyCallback($property);
         return array($callback, 'get');
     }
+
+    /** Returns a wrapper around the PlIterator suitable for foreach() iterations
+     */
+    public static function foreachIterator(PlIterator $iterator)
+    {
+        return new SPLIterator($iterator);
+    }
 }
 
 /** Empty iterator
@@ -803,5 +810,48 @@ class _GetObjectPropertyCallback
     }
 }
 
+// Wrapper class to build a SPL iterator from a PlIterator
+class SPLIterator implements Iterator
+{
+    private $it;
+    private $pos;
+    private $value;
+
+    public function __construct(PlIterator $it)
+    {
+        $this->it = $it;
+        $this->pos = 0;
+        $this->value = $this->it->next();
+    }
+
+    public function rewind()
+    {
+        if ($this->pos != 0) {
+            throw new Exception("Rewind not supported on this iterator");
+        }
+    }
+
+    public function current()
+    {
+        return $this->value;
+    }
+
+    public function key()
+    {
+        return $this->pos;
+    }
+
+    public function next()
+    {
+        ++$this->pos;
+        $this->value = $this->it->next();
+    }
+
+    public function valid()
+    {
+        return !!$this->value;
+    }
+}
+
 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 ?>