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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
+{
+
+/** This class can be used as a base class for UNO objects.
+ It implements the capability to be kept weakly
+ (unoidl.com.sun.star.uno.XWeak) and it implements
+ unoidl.com.sun.star.lang.XTypeProvider which is necessary for
+ using the object from StarBasic.
+*/
+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
+ /** The returned XAdapter implementation can be used to keap a
+ weak reference to this object.
+
+ @return a weak adapter
+ */
+ public XAdapter queryAdapter()
+ {
+ if (null == m_adapter)
+ {
+ lock (this)
+ {
+ if (null == m_adapter)
+ m_adapter = new WeakAdapter( this );
+ }
+ }
+ return m_adapter;
+ }
+
+ /** Overrides of Object.Finalize method.
+ When there are no references to this object anymore, then the
+ garbage collector calls this method, thereby causing the adapter
+ object to be notified. The adapter, in turn, notifies all
+ listeners (unoidl.com.sun.star.uno.XReference).
+ */
+ ~WeakBase()
+ {
+ if (null != m_adapter)
+ m_adapter.referentDying();
+ }
+
+ // XTypeProvider impl
+
+ /** Returns an array of Type objects which represent all implemented
+ UNO interfaces of this object.
+
+ @return Type objects of all implemented interfaces.
+ */
+ 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();
+ }
+}
+
+}
+