1 files changed, 143 insertions, 0 deletions
diff --git a/javaunohelper/com/sun/star/lib/uno/helper/WeakBase.java b/javaunohelper/com/sun/star/lib/uno/helper/WeakBase.java
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+++ b/javaunohelper/com/sun/star/lib/uno/helper/WeakBase.java
@@ -0,0 +1,143 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+package com.sun.star.lib.uno.helper;
+import com.sun.star.uno.XWeak;
+import com.sun.star.uno.XAdapter;
+import com.sun.star.lang.XTypeProvider;
+import com.sun.star.uno.Type;
+import java.util.Vector;
+import java.util.Map;
+import java.util.Hashtable;
+
+
+/** This class can be used as the base class for UNO components. It implements the capability
+ *  to be kept weak (com.sun.star.uno.XWeak) and it implements com.sun.star.lang.XTypeProvider
+ *  which is necessary for using the component with StarBasic.
+ */
+public class WeakBase implements XWeak, XTypeProvider
+{
+    private final boolean DEBUG= false;
+
+    // Contains all WeakAdapter which have been created in this class
+    // They have to be notified when this object dies
+    private WeakAdapter m_adapter;
+
+    protected static Map _mapImplementationIds= new Hashtable();
+    protected static Map _mapTypes= new Hashtable();
+
+    /** Method of XWeak. The returned XAdapter implementation can be used to keap
+     * a weak reference to this object.
+     * @return a com.sun.star.uno.XAdapter implementation.
+     */
+    synchronized public XAdapter queryAdapter()
+    {
+        if (m_adapter == null)
+            m_adapter= new WeakAdapter(this);
+        return m_adapter;
+    }
+
+    /** Override of Object.finalize. 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 (com.sun.star.uno.XReference)
+     */
+    protected void finalize() throws java.lang.Throwable
+    {
+        if (m_adapter != null)
+            m_adapter.referentDying();
+        super.finalize();
+    }
+
+    /** Method of XTypeProvider. It 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[] arTypes= (Type[]) _mapTypes.get( getClass());
+        if (arTypes == null)
+        {
+            Vector vec= new Vector();
+            Class currentClass= getClass();
+            do
+            {
+                Class interfaces[]= currentClass.getInterfaces();
+                for(int i = 0; i < interfaces.length; ++ i)
+                {
+                    // Test if it is a UNO interface
+                    if (com.sun.star.uno.XInterface.class.isAssignableFrom((interfaces[i])))
+                        vec.add(new Type(interfaces[i]));
+                }
+                // get the superclass the currentClass inherits from
+                currentClass= currentClass.getSuperclass();
+            } while (currentClass != null);
+
+            Type types[]= new Type[vec.size()];
+            for( int i= 0; i < types.length; i++)
+                types[i]= (Type) vec.elementAt(i);
+            _mapTypes.put(getClass(), types);
+            arTypes= types;
+        }
+        return arTypes;
+    }
+
+    /** Method of XTypeProvider. It provides an identifier that represents the set of UNO
+     * interfaces implemented by this class. All instances of this class
+     * which run in the same Java Virtual Machine return the same array. (This only works as long
+     * the ClassLoader preserves the class even if no instance exist.)
+     *@return identifier as array of bytes
+     */
+    public byte[] getImplementationId()
+    {
+        byte[] id= null;
+        synchronized (_mapImplementationIds)
+        {
+            id= (byte[]) _mapImplementationIds.get(getClass());
+
+            if (id == null)
+            {
+                int hash = hashCode();
+                String sName= getClass().getName();
+                byte[] arName= sName.getBytes();
+                int nNameLength= arName.length;
+
+                id= new byte[ 4 + nNameLength];
+                id[0]= (byte)(hash & 0xff);
+                id[1]= (byte)((hash >>> 8) & 0xff);
+                id[2]= (byte)((hash >>> 16) & 0xff);
+                id[3]= (byte)((hash >>>24) & 0xff);
+
+                for (int i= 0; i < nNameLength; i++)
+                {
+                    id[4 + i]= arName[i];
+                }
+                _mapImplementationIds.put(getClass(), id);
+            }
+        }
+        return id;
+    }
+}