/*******************************************************************************
 * Copyright (c) 2007, 2010 BMW Car IT, Technische Universitaet Muenchen, 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:
 * BMW Car IT - Initial API and implementation
 * Technische Universitaet Muenchen - Major refactoring and extension
 *******************************************************************************/
package org.eclipse.emf.edapt.history.reconstruction;

// CB Migrate
// import org.eclipse.emf.compare.diff.metamodel.DiffElement;
// import org.eclipse.emf.compare.diff.metamodel.DiffGroup;
// import org.eclipse.emf.compare.diff.metamodel.DiffModel;
// import org.eclipse.emf.compare.diff.metamodel.DiffResourceSet;

/**
 * Helper methods for filtering difference models.
 *
 * @author herrmama
 * @author $Author$
 * @version $Rev$
 * @levd.rating RED Rev:
 */
public final class DiffModelFilterUtils {

	/** Constructor. */
	private DiffModelFilterUtils() {
		// hidden, since this class is not expected to be instantiated.
	}

	/** Filter a diff model. */
	// CB Migrate
	// public static DiffModel filter(DiffModel model, IDiffModelFilter filter) {
	// doFilter(model, filter);
	// return model;
	// }

	/** Filter a diff model. */

	// CB Migrate
	// public static DiffResourceSet filter(DiffResourceSet model,
	// IDiffModelFilter filter) {
	// doFilter(model, filter);
	// return model;
	// }

	/** Perform filtering on an element in a diff model. */

	// CB Migrate
	// private static void doFilter(EObject element, IDiffModelFilter filter) {
	// for (EObject child : new ArrayList<EObject>(element.eContents())) {
	// if (child instanceof DiffElement
	// && !filter.select((DiffElement) child)) {
	// EcoreUtil.delete(child);
	// continue;
	// }
	// doFilter(child, filter);
	// if (child instanceof DiffGroup) {
	// if (child.eContents().isEmpty()) {
	// EcoreUtil.delete(child);
	// }
	// }
	// }
	// }

	/**
	 * Create a filter from a number of filters that only selects an element if
	 * it is selected by all filters.
	 */
	public static <E> IDiffModelFilter and(final IDiffModelFilter... filters) {
		return new IDiffModelFilter() {

			// CB Migrate
			// public boolean select(DiffElement element) {
			// for (IDiffModelFilter filter : filters) {
			// if (!filter.select(element)) {
			// return false;
			// }
			// }
			// return true;
			// }
		};
	}
}