/*******************************************************************************
 * Copyright (c) 2013 Obeo.
 * 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:
 *     Obeo - initial API and implementation
 *******************************************************************************/
package org.eclipse.emf.compare.uml2.internal.postprocessor.extension.clazz;

import static com.google.common.base.Predicates.instanceOf;

import com.google.common.collect.Iterables;

import java.util.LinkedHashSet;
import java.util.Set;

import org.eclipse.emf.compare.Diff;
import org.eclipse.emf.compare.uml2.internal.GeneralizationSetChange;
import org.eclipse.emf.compare.uml2.internal.UMLCompareFactory;
import org.eclipse.emf.compare.uml2.internal.UMLDiff;
import org.eclipse.emf.compare.uml2.internal.postprocessor.AbstractUMLChangeFactory;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.Switch;
import org.eclipse.uml2.uml.GeneralizationSet;

/**
 * Factory for Generalization set changes.
 * 
 * @author <a href="mailto:cedric.notot@obeo.fr">Cedric Notot</a>
 */
public class UMLGeneralizationSetChangeFactory extends AbstractUMLChangeFactory {

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#getExtensionKind()
	 */
	@Override
	public Class<? extends UMLDiff> getExtensionKind() {
		return GeneralizationSetChange.class;
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.emf.compare.internal.postprocessor.factories.AbstractChangeFactory#createExtension()
	 */
	@Override
	public UMLDiff createExtension() {
		return UMLCompareFactory.eINSTANCE.createGeneralizationSetChange();
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.emf.compare.uml2.internal.postprocessor.AbstractUMLChangeFactory#getDiscriminant(org.eclipse.emf.compare.Diff)
	 */
	@Override
	protected EObject getDiscriminant(Diff input) {
		return Iterables.find(getDiscriminants(input), instanceOf(GeneralizationSet.class), null);
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.emf.compare.uml2.internal.postprocessor.AbstractUMLChangeFactory#getDiscriminantsGetter()
	 */
	@Override
	protected Switch<Set<EObject>> getDiscriminantsGetter() {
		return new DiscriminantsGetter() {

			@Override
			public Set<EObject> caseGeneralizationSet(GeneralizationSet object) {
				Set<EObject> result = new LinkedHashSet<EObject>();
				result.add(object);
				return result;
			}
		};
	}

}