/*******************************************************************************
* Copyright (c) 2006, 2012 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.
*
* @since 1.0
*/
public class RootVMNode extends AbstractVMNode implements IRootVMNode {
public RootVMNode(AbstractVMProvider provider) {
super(provider);
}
@Override
public void update(IChildrenUpdate[] updates) {
throw new UnsupportedOperationException("Root view model node should never be queried for list of elements."); //$NON-NLS-1$
}
@Override
public void update(IChildrenCountUpdate[] updates) {
throw new UnsupportedOperationException("Root view model node should never be queried for list of elements."); //$NON-NLS-1$
}
@Override
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.
*/
@Override
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.
*/
@Override
public void createRootDelta(Object rootObject, Object event, final DataRequestMonitor<VMDelta> rm) {
rm.setData(new VMDelta(rootObject, 0, IModelDelta.NO_CHANGE));
rm.done();
}
@Override
public int getDeltaFlags(Object event) {
return IModelDelta.NO_CHANGE;
}
@Override
public void buildDelta(Object event, VMDelta parent, int nodeOffset, RequestMonitor requestMonitor) {
requestMonitor.done();
}
}