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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef __com_sun_star_lang_XComponent_idl__
+#define __com_sun_star_lang_XComponent_idl__
+
+#include <com/sun/star/uno/XInterface.idl>
+
+
+module com {  module sun {  module star {  module lang {
+
+ published interface XEventListener;
+
+/** allows to explicitly free resources and break cyclic references.
+
+    <p>Actually the real lifetime of a UNO object is controlled by
+    references kept on interfaces of this object. But there are two
+    distinct meanings in keeping a reference to an interface:
+    1st to own the object and 2nd to know the object.
+
+    <p>You are only allowed to keep references of interfaces
+    to UNO objects if you are by definition the owner of that object or
+    your reference is very temporary or you have registered an
+    EventListener at that object and release the reference when
+    "disposing" is called.</p>
+ */
+published interface XComponent: com::sun::star::uno::XInterface
+{
+    /** The owner of an object calls this method to explicitly free all
+        resources kept by this object and thus break cyclic references.
+
+        <p>Only the owner of this object is allowed to call this method.
+        The object should release all resources and references in the
+        easiest possible manner ( for instance no serialization should
+        take place anymore ).
+        </p>
+        <p>
+        The object must notify all registered listeners using the method
+        XEventListener::disposing(). All notified objects
+        should release there references to this object without
+        calling XComponent::removeEventListener()
+        (the disposed object will release the listeners eitherway).
+        </p>
+
+        <p>After this method has been called, the object should behave as passive
+        as possible, thus it should ignore all calls
+        in case it can comply with its specification (for instance addEventListener()).
+        Often the object can't fulfill its specification anymore,
+        in this case it must throw the DisposedException
+        (which is derived from com::sun::star::uno::RuntimeException)
+        when it gets called.</p>
+
+        <p>For some objects no real owner can be identified, thus it can be
+        disposed from multiple reference holders. In this case
+        the object should be able to cope with multiple dispose()-calls (which
+        are inevitable in a multithreaded environment).
+     */
+    void dispose();
+
+    /** adds an event listener to the object.
+
+        <p>The broadcaster fires the disposing method of this listener
+        if the XComponent::dispose() method is called.</p>
+
+        <p>It is suggested to allow multiple registration of the same listener,
+        thus for each time a listener is added, it has to be removed.</p>
+
+        <p>If this XComponent is already disposed when
+        XComponent::addEventListener() is called, the call will not fail
+        with a DisposedException, but the caller will be notified via the
+        XEventListener::disposing()
+        callback.  This callback can occur synchronously within the
+        addEventListener() call.</p>
+
+        @see XComponent::removeEventListener
+     */
+    void addEventListener( [in] XEventListener xListener );
+
+    /** removes an event listener from the listener list.
+
+        <p>It is a "noop" if the specified listener is not registered.</p>
+
+        <p>It is suggested to allow multiple registration of the same listener,
+        thus for each time a listener is added, it has to be removed.
+
+        <p>If this XComponent is already disposed when
+        XComponent::removeEventListener() is called, the call will not
+        fail with a DisposedException,
+        but will rather be ignored silently.</p>
+
+        @see XComponent::addEventListener
+     */
+    void removeEventListener( [in] XEventListener aListener );
+
+};
+
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */