Introduce interface Reducible

refs #8826

library/Icinga/Data/Reducible.php

@@ -0,0 +1,23 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Data;
+
+use Icinga\Data\Filter\Filter;
+use Icinga\Exception\StatementException;
+
+/**
+ * Interface for data deletion
+ */
+interface Reducible
+{
+    /**
+     * Delete entries in the given target, optionally limiting the affected entries by using a filter
+     *
+     * @param   string  $target
+     * @param   Filter  $filter
+     *
+     * @throws  StatementException
+     */
+    public function delete($target, Filter $filter = null);
+}