layers/plugins/org.eclipse.papyrus.infra.gmfdiag.layers.ui/src/org/eclipse/papyrus/internal/infra/gmfdiag/layers/ui/queries/GetDiagramContainer.java

/*****************************************************************************
 * Copyright (c) 2018 EclipseSource 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:
 *   EclipseSource - Initial API and implementation
 *   
 *****************************************************************************/

package org.eclipse.papyrus.internal.infra.gmfdiag.layers.ui.queries;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.papyrus.emf.facet.efacet.core.IFacetManager;
import org.eclipse.papyrus.emf.facet.efacet.core.exception.DerivedTypedElementException;
import org.eclipse.papyrus.emf.facet.query.java.core.IJavaQuery2;
import org.eclipse.papyrus.emf.facet.query.java.core.IParameterValueList2;
import org.eclipse.papyrus.infra.gmfdiag.common.utils.DiagramUtils;

/**
 * Query to retrieve the graphical container of a Diagram. If no such container
 * exists, the semantic element of the Diagram is returned.
 * 
 * @see {@link DiagramUtils#getOwner(Diagram)}
 */
public class GetDiagramContainer implements IJavaQuery2<Diagram, EObject> {

	/**
	 * @see org.eclipse.papyrus.emf.facet.query.java.core.IJavaQuery2#evaluate(org.eclipse.emf.ecore.EObject, org.eclipse.papyrus.emf.facet.query.java.core.IParameterValueList2, org.eclipse.papyrus.emf.facet.efacet.core.IFacetManager)
	 *
	 * @param source
	 * @param parameterValues
	 * @param facetManager
	 * @return
	 * @throws DerivedTypedElementException
	 */
	@Override
	public EObject evaluate(Diagram source, IParameterValueList2 parameterValues, IFacetManager facetManager) throws DerivedTypedElementException {
		return DiagramUtils.getOwner(source);
	}

}