/*******************************************************************************
* 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.editor.editparts.condition;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.henshin.model.Formula;
import org.eclipse.emf.henshin.model.Graph;
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.editor.commands.rule.DeleteFormulaCommand;
/**
* The Class ConditionComponentEditPolicy.
*
* @author Angeline Warning
*/
public class ConditionComponentEditPolicy extends ComponentEditPolicy implements
EditPolicy {
/**
* Create a delete command to delete a formula, only if the parent is a
* graph or a formula.
*
* @param deleteRequest
* A request to delete a formula.
* @return Command Delete command
*/
@Override
protected Command createDeleteCommand(GroupRequest deleteRequest) {
Formula toDelete = (Formula) getHost().getModel();
EObject parent = toDelete.eContainer();
if (parent instanceof Graph || parent instanceof Formula) {
return new DeleteFormulaCommand(toDelete, parent);
}
return null;
}
}