1 files changed, 71 insertions, 0 deletions
diff --git a/dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/ui/viewmodel/RootVMNode.java b/dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/ui/viewmodel/RootVMNode.java
new file mode 100644
index 00000000000..41bbef29e45
--- /dev/null
+++ b/dsf/org.eclipse.cdt.dsf.ui/src/org/eclipse/cdt/dsf/ui/viewmodel/RootVMNode.java
@@ -0,0 +1,71 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 2008 Wind River Systems 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:
+ *     Wind River Systems - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.dsf.ui.viewmodel;
+
+import org.eclipse.cdt.dsf.concurrent.DataRequestMonitor;
+import org.eclipse.cdt.dsf.concurrent.RequestMonitor;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenCountUpdate;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IHasChildrenUpdate;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
+
+/**
+ * Default implementation of a root view model node.  This class may be sub-classed
+ * to implement model-specific event handling.
+ */
+@SuppressWarnings("restriction")
+public class RootVMNode extends AbstractVMNode implements IRootVMNode {
+
+    public RootVMNode(AbstractVMProvider provider) {
+        super(provider);
+    }
+
+    public void update(IChildrenUpdate[] updates) {
+        throw new UnsupportedOperationException("Root view model node should never be queried for list of elements."); //$NON-NLS-1$
+    }
+    
+    public void update(IChildrenCountUpdate[] updates) {
+        throw new UnsupportedOperationException("Root view model node should never be queried for list of elements."); //$NON-NLS-1$
+    }
+
+    public void update(IHasChildrenUpdate[] updates) {
+        throw new UnsupportedOperationException("Root view model node should never be queried for list of elements."); //$NON-NLS-1$
+    }
+
+    /** 
+     * Default implementation does not examine the event and assumes that every
+     * event should be processed to generate a delta.
+     */
+    public boolean isDeltaEvent(Object rootObject, Object event) {
+        if (event instanceof ModelProxyInstalledEvent) {
+            return rootObject.equals( ((ModelProxyInstalledEvent)event).getRootElement() ); 
+        }
+        return true;
+    } 
+    
+    /**
+     * Default implementation creates a delta assuming that the root layout node
+     * is the input object into the view.  
+     */
+    public void createRootDelta(Object rootObject, Object event, final DataRequestMonitor<VMDelta> rm) {
+        rm.setData(new VMDelta(rootObject, 0, IModelDelta.NO_CHANGE));
+        rm.done();
+    }
+    
+    
+    public int getDeltaFlags(Object event) {
+        return IModelDelta.NO_CHANGE;
+    }
+    
+    public void buildDelta(Object event, VMDelta parent, int nodeOffset, RequestMonitor requestMonitor) {
+        requestMonitor.done();
+    }
+}