old/org.eclipse.emf.ecp.editor/src/org/eclipse/emf/ecp/editor/mecontrols/melinkcontrol/MEHyperLinkDeleteAdapter.java

/*******************************************************************************
 * Copyright (c) 2008-2011 Chair for Applied Software Engineering,
 * Technische Universitaet Muenchen.
 * 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:
 ******************************************************************************/
package org.eclipse.emf.ecp.editor.mecontrols.melinkcontrol;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecp.common.commands.DeleteModelElementCommand;
import org.eclipse.emf.ecp.common.commands.DeleteReferenceCommand;
import org.eclipse.emf.ecp.common.model.ECPModelelementContext;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;

/**
 * A mouse adapter regarding deletion of model elements.
 * 
 * @author helming
 * @author shterev
 */
public class MEHyperLinkDeleteAdapter extends MouseAdapter {

	private EObject modelElement;
	private EReference reference;
	private EObject opposite;
	private final ECPModelelementContext context;

	/**
	 * Default constructor.
	 * 
	 * @param modelElement the model element
	 * @param reference the reference link
	 * @param opposite the model element on the other side of the link
	 * @param context the model element context
	 */
	public MEHyperLinkDeleteAdapter(EObject modelElement, EReference reference, EObject opposite,
		ECPModelelementContext context) {
		this.modelElement = modelElement;
		this.reference = reference;
		this.opposite = opposite;
		this.context = context;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void mouseUp(MouseEvent e) {
		if ((reference.isContainment() && context.getMetaModelElementContext().isNonDomainElement(opposite.eClass()))
			|| context.getMetaModelElementContext().isAssociationClassElement(opposite)) {
			new DeleteModelElementCommand(opposite, context).run();
		} else {
			new DeleteReferenceCommand(modelElement, reference, opposite, context.getEditingDomain()).run();
		}
	}
}