WeakAdapter.cs

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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 .
 */
 
using System;
using unoidl.com.sun.star.uno;
using unoidl.com.sun.star.lang;
 
namespace uno.util
{
    
public class WeakAdapter : XAdapter
{
    // references the XWeak implementation
    private WeakReference m_weakRef;
    // contains XReference objects registered by addReference
    private delegate void XReference_dispose();
    private XReference_dispose m_XReference_dispose;
    
    public WeakAdapter( Object obj )
    {
        m_weakRef = new WeakReference( obj );
        m_XReference_dispose = null;
    }
    
    internal /* non-virtual */ void referentDying()
    {
        XReference_dispose call;
        lock (this)
        {
            call = m_XReference_dispose;
            m_XReference_dispose = null;
        }
        if (null != call)
            call();
    }
    
    // XAdapter impl
    
    public Object queryAdapted()
    {
        return m_weakRef.Target;
    }
    public void removeReference( XReference xReference )
    {
        lock (this)
        {
            m_XReference_dispose -=
                new XReference_dispose( xReference.dispose );
        }
    }
    public void addReference( XReference xReference )
    {
        lock (this)
        {
            m_XReference_dispose +=
                new XReference_dispose( xReference.dispose );
        }
    }
}
 
}