[#3084] Split new interface methods into separate interface

- To prevent a BC break (uncovered by running the unit tests), moved new
  attachAggregate() and detachAggregate() methods into a separate interface; the
  SharedEventManager implementation now also implements this new interface.

library/Zend/EventManager/SharedEventAggregateAwareInterface.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ * @package   Zend_EventManager
+ */
+
+namespace Zend\EventManager;
+
+
+/**
+ * Interface for allowing attachment of shared aggregate listeners.
+ *
+ * @category   Zend
+ * @package    Zend_EventManager
+ */
+interface SharedEventAggregateAwareInterface
+{
+    /**
+     * Attach a listener aggregate
+     *
+     * @param  SharedListenerAggregateInterface $aggregate
+     * @param  int $priority If provided, a suggested priority for the aggregate to use
+     * @return mixed return value of {@link SharedListenerAggregateInterface::attachShared()}
+     */
+    public function attachAggregate(SharedListenerAggregateInterface $aggregate, $priority = 1);
+
+    /**
+     * Detach a listener aggregate
+     *
+     * @param  SharedListenerAggregateInterface $aggregate
+     * @return mixed return value of {@link SharedListenerAggregateInterface::detachShared()}
+    */
+    public function detachAggregate(SharedListenerAggregateInterface $aggregate);
+}

library/Zend/EventManager/SharedEventManager.php

@@ -23,7 +23,9 @@
  * @category   Zend
  * @package    Zend_EventManager
  */
-class SharedEventManager implements SharedEventManagerInterface
+class SharedEventManager implements
+    SharedEventAggregateAwareInterface,
+    SharedEventManagerInterface
 {
     /**
      * Identifiers with event connections

library/Zend/EventManager/SharedEventManagerInterface.php

@@ -66,22 +66,4 @@ public function getEvents($id);
      * @return bool
      */
     public function clearListeners($id, $event = null);
-
-    /**
-     * Attach a listener aggregate
-     *
-     * @param  SharedListenerAggregateInterface $aggregate
-     * @param  int $priority If provided, a suggested priority for the aggregate to use
-     * @return mixed return value of {@link SharedListenerAggregateInterface::attachShared()}
-     */
-    public function attachAggregate(SharedListenerAggregateInterface $aggregate, $priority = 1);
-
-    /**
-     * Detach a listener aggregate
-     *
-     * @param  SharedListenerAggregateInterface $aggregate
-     * @return mixed return value of {@link SharedListenerAggregateInterface::detachShared()}
-    */
-    public function detachAggregate(SharedListenerAggregateInterface $aggregate);
-
 }