/*******************************************************************************
* Copyright (c) 2010-2015 Henshin developers. 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:
* TU Berlin, University of Luxembourg, SES S.A.
*******************************************************************************/
package de.tub.tfs.henshin.tggeditor.editpolicies.graphical;
import org.eclipse.emf.henshin.model.Node;
import org.eclipse.emf.henshin.model.Rule;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.ComponentEditPolicy;
import org.eclipse.gef.requests.GroupRequest;
import de.tub.tfs.henshin.tgg.TNode;
import de.tub.tfs.henshin.tgg.interpreter.util.ExceptionUtil;
import de.tub.tfs.henshin.tggeditor.commands.delete.DeleteNodeCommand;
import de.tub.tfs.henshin.tggeditor.commands.delete.rule.DeleteRuleNodeCommand;
public class NodeComponentEditPolicy extends ComponentEditPolicy implements
EditPolicy {
@Override
protected Command createDeleteCommand(GroupRequest deleteRequest) {
if(!(getHost().getModel() instanceof Node))
{
return null;
}
Node node = (Node) getHost().getModel();
if (node.getGraph()==null) {
return null;
}
Rule rule = node.getGraph().getRule();
if (rule != null) {//node in a rule
return new DeleteRuleNodeCommand(node);
} else {//node in a graph
return new DeleteNodeCommand(node);
}
}
}