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/*
* 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 .
*/
package com.sun.star.lib.util;
/**
* Optional interface to be implemented by objects stored in a
* <code>WeakMap</code>.
*
* @see WeakMap
*/
public interface DisposeNotifier {
/**
* Adds a dispose listener, to be notified when this object is disposed.
*
* <p>It is unspecified what happens when the same listener is added
* multiple times.</p>
*
* <p>It is unspecified exactly when the <code>notifyDispose</code> callback
* is fired: immediately before the notifier is disposed, while it is in the
* process of disposing, or some time after it got disposed. But even if
* adding a listener to an already disposed notifier, the listener must
* eventually receive a <code>notifyDispose</code> callback.</p>
*
* @param listener a dispose listener, to be notified when this object is
* disposed; must not be <code>null</code>
*/
void addDisposeListener(DisposeListener listener);
}
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