--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/provisional/swt/AbstractSWTVetoableValue.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (c) 2006 The Pampered Chef, Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     The Pampered Chef, Inc. - initial API and implementation
+ ******************************************************************************/
+
+module org.eclipse.jface.internal.databinding.provisional.swt.AbstractSWTVetoableValue;
+
+import java.lang.all;
+
+import org.eclipse.core.databinding.observable.Realm;
+import org.eclipse.core.databinding.observable.value.AbstractVetoableValue;
+import org.eclipse.jface.databinding.swt.ISWTObservableValue;
+import org.eclipse.jface.databinding.swt.SWTObservables;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.events.DisposeListener;
+import org.eclipse.swt.widgets.Widget;
+
+/**
+ * NON-API - An abstract superclass for vetoable values that gurantees that the 
+ * observable will be disposed when the control to which it is attached is
+ * disposed.
+ * 
+ * @since 1.1
+ */
+public abstract class AbstractSWTVetoableValue : AbstractVetoableValue , ISWTObservableValue {
+
+    private final Widget widget;
+
+    /**
+     * Standard constructor for an SWT VetoableValue.  Makes sure that
+     * the observable gets disposed when the SWT widget is disposed.
+     * 
+     * @param widget
+     */
+    protected this(Widget widget) {
+        this(SWTObservables.getRealm(widget.getDisplay()), widget);
+    }
+    
+    /**
+     * Constructs a new instance for the provided <code>realm</code> and <code>widget</code>.
+     * 
+     * @param realm
+     * @param widget
+     * @since 1.2
+     */
+    protected this(Realm realm, Widget widget) {
+        super(realm);
+        this.widget = widget;
+        if (widget is null) {
+            throw new IllegalArgumentException("The widget parameter is null."); //$NON-NLS-1$
+        }
+        widget.addDisposeListener(disposeListener);
+    }
+    
+    private DisposeListener disposeListener = new class() DisposeListener {
+        public void widgetDisposed(DisposeEvent e) {
+            this.outer.dispose();
+        }
+    };
+
+    /**
+     * @return Returns the widget.
+     */
+    public Widget getWidget() {
+        return widget;
+    }
+}