--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/viewers/ObservableSetContentProvider.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,108 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 2008 IBM Corporation 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:
+ *     IBM Corporation - initial API and implementation
+ *     Brad Reynolds - bug 116920
+ *     Matthew Hall - bugs 215531, 226765
+ *******************************************************************************/
+module org.eclipse.jface.databinding.viewers.ObservableSetContentProvider;
+
+import java.lang.all;
+
+import java.util.Set;
+
+import org.eclipse.core.databinding.observable.IObservableCollection;
+import org.eclipse.core.databinding.observable.set.IObservableSet;
+import org.eclipse.core.databinding.observable.set.ISetChangeListener;
+import org.eclipse.core.databinding.observable.set.SetChangeEvent;
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.internal.databinding.viewers.ObservableCollectionContentProvider;
+import org.eclipse.jface.viewers.AbstractListViewer;
+import org.eclipse.jface.viewers.AbstractTableViewer;
+import org.eclipse.jface.viewers.IStructuredContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+/**
+ * A {@link IStructuredContentProvider content provider} for
+ * {@link AbstractTableViewer} or {@link AbstractListViewer} that provides
+ * elements of an {@link IObservableSet} when set as the viewer's input. Objects
+ * of this class listen for changes to the observable set, and will insert and
+ * remove viewer elements to reflect observed changes.
+ * 
+ * <p>
+ * This class is not intended to be subclassed by clients.
+ * 
+ * @since 1.1
+ */
+public class ObservableSetContentProvider : IStructuredContentProvider {
+    private ObservableCollectionContentProvider impl;
+
+    private static class Impl : ObservableCollectionContentProvider
+            , ISetChangeListener {
+        protected void checkInput(Object input) {
+            Assert
+                    .isTrue(null !is cast(IObservableSet)input,
+                            "This content provider only works with input of type IObservableSet"); //$NON-NLS-1$
+        }
+
+        protected void addCollectionChangeListener(
+                IObservableCollection collection) {
+            (cast(IObservableSet) collection).addSetChangeListener(this);
+        }
+
+        protected void removeCollectionChangeListener(
+                IObservableCollection collection) {
+            (cast(IObservableSet) collection).removeSetChangeListener(this);
+        }
+
+        public void handleSetChange(SetChangeEvent event) {
+            if (isViewerDisposed())
+                return;
+
+            Set removals = event.diff.getRemovals();
+            viewerUpdater.remove(removals.toArray());
+            knownElements.removeAll(removals);
+
+            Set additions = event.diff.getAdditions();
+            knownElements.addAll(additions);
+            viewerUpdater.add(additions.toArray());
+        }
+    }
+
+    /**
+     * Constructs an ObservableSetContentProvider
+     */
+    public this() {
+        impl = new Impl();
+    }
+
+    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+        impl.inputChanged(viewer, oldInput, newInput);
+    }
+
+    public Object[] getElements(Object inputElement) {
+        return impl.getElements(inputElement);
+    }
+
+    public void dispose() {
+        impl.dispose();
+    }
+
+    /**
+     * Returns the set of elements known to this content provider. Label
+     * providers may track this set if they need to be notified about additions
+     * before the viewer sees the added element, and notified about removals
+     * after the element was removed from the viewer. This is intended for use
+     * by label providers, as it will always return the items that need labels.
+     * 
+     * @return unmodifiable set of items that will need labels
+     */
+    public IObservableSet getKnownElements() {
+        return impl.getKnownElements();
+    }
+}