1 files changed, 30 insertions, 0 deletions
diff --git a/library/Icinga/Util/EnumeratingFilterIterator.php b/library/Icinga/Util/EnumeratingFilterIterator.php
new file mode 100644
index 0000000..0659961
--- /dev/null
+++ b/library/Icinga/Util/EnumeratingFilterIterator.php
@@ -0,0 +1,30 @@
+<?php
+/* Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Util;
+
+use FilterIterator;
+
+/**
+ * Class EnumeratingFilterIterator
+ *
+ * FilterIterator with continuous numeric key (index)
+ */
+abstract class EnumeratingFilterIterator extends FilterIterator
+{
+    /**
+     * @var int
+     */
+    private $index;
+
+    public function rewind(): void
+    {
+        parent::rewind();
+        $this->index = 0;
+    }
+
+    public function key(): int
+    {
+        return $this->index++;
+    }
+}