New component: Doctrine_EventListener_Chain

Doctrine/Configurable.php

@@ -118,8 +118,12 @@ abstract class Doctrine_Configurable {
      * @param Doctrine_EventListener $listener
      * @return void
      */
-    final public function setEventListener(Doctrine_EventListener $listener) {
+    final public function setEventListener($listener) {
         $i = Doctrine::ATTR_LISTENER;
+        if( ! ($listener instanceof Doctrine_EventListener) && 
+            ! ($listener instanceof Doctrine_EventListener_Chain))
+            throw new Doctrine_Exception("EventListener must extend Doctrine_EventListener or Doctrine_EventListener_Chain");
+
         $this->attributes[$i] = $listener;
     }
     /**

Doctrine/EventListener/Chain.php

@@ -0,0 +1,52 @@
+<?php
+class Doctrine_EvenListener_Chain extends Doctrine_Access {
+    /**
+     * @var array $listeners
+     */
+    private $listeners = array();
+    /**
+     * add
+     *
+     * @param Doctrine_EventListener $listener
+     * @return void
+     */
+    public function add(Doctrine_EventListener $listener) {
+        $this->listeners[] = $listener;
+    }
+    /**
+     * returns a Doctrine_EvenListener on success
+     * and null on failure
+     *
+     * @param mixed $key
+     * @return mixed
+     */
+    public function get($key) {
+        if( ! isset($this->listeners[$key]))
+            return null;
+
+        return $this->listeners[$key];
+    }
+    /**
+     * set
+     * 
+     * @param mixed $key
+     * @param Doctrine_EventListener $listener
+     * @return void
+     */
+    public function set($key, Doctrine_EventListener $listener) {
+        $this->listeners[$key] = $listener;
+    }
+    /**
+     * this method should only be called internally by
+     * doctrine, since it doesn't do any method existence checking
+     *
+     * @param method $method
+     * @param array $args
+     */
+    public function __call($method, $args) {
+        foreach($this->listeners as $listener) {
+            $listener->$method($args[0]);
+        }
+    }
+}
+?>

Doctrine/EventListener/Debugger.php

@@ -16,6 +16,7 @@ class Doctrine_DebugMessage {
     }
 }
 class Doctrine_EventListener_Debugger extends Doctrine_EventListener {
+
     const EVENT_LOAD            = 1;
     const EVENT_PRELOAD         = 2;
     const EVENT_SLEEP           = 3;