WeakBase.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 System.Collections;
using unoidl.com.sun.star.uno;
using unoidl.com.sun.star.lang;
 
namespace uno.util
{
 
public class WeakBase : XWeak, XTypeProvider
{
    // Contains all WeakAdapter which have been created in this class
    // They have to be notified when this object dies
    private WeakAdapter m_adapter = null;
    
    protected static Hashtable s_types = new Hashtable();
    protected static Hashtable s_impl_ids = new Hashtable();
    
    // XWeak impl
    public XAdapter queryAdapter()
    {
        if (null == m_adapter)
        {
            lock (this)
            {
                if (null == m_adapter)
                    m_adapter = new WeakAdapter( this );
            }
        }
        return m_adapter;
    }
    
    ~WeakBase()
    {
        if (null != m_adapter)
            m_adapter.referentDying();
    }
    
    // XTypeProvider impl
    
    public Type [] getTypes()
    {
        Type [] types;
        Type type = GetType();
        lock (s_types)
        {
            types = (Type []) s_types[ type ];
            if (null == types)
            {
                Type [] interfaces = type.GetInterfaces();
                ArrayList list = new ArrayList( interfaces.Length );
                for ( Int32 pos = 0; pos < interfaces.Length; ++pos )
                {
                    Type iface = interfaces[ pos ];
                    // xxx todo: as long as the bridge cannot introduce
                    // native CTS types into UNO on the fly
                    if (iface.FullName.StartsWith( "unoidl." ))
                    {
                        list.Add( iface );
                    }
                }
                Int32 len = list.Count;
                Type [] ar = new Type [ len ];
                for ( Int32 pos = 0; pos < len; ++pos )
                    ar[ pos ] = (Type) list[ pos ];
                s_types[ type ] = ar;
                types = ar;
            }
        }
        return types;
    }
    
    public byte [] getImplementationId()
    {
        return new byte[0];
    }
    
    // System.Object
    public override String ToString()
    {
        System.Text.StringBuilder buf =
            new System.Text.StringBuilder( base.ToString(), 256 );
        buf.Append( "\nUNO Object Implementation:\n\tInterfaces: " );
        Type [] types = getTypes();
        for ( Int32 pos = 0; pos < types.Length; ++pos )
        {
            buf.Append( types[ pos ].FullName );
            if (pos < (types.Length -1))
                buf.Append( ", " );
        }
        return buf.ToString();
    }
}
 
}