org.eclipse.mylyn.gerrit.core/src/org/eclipse/mylyn/internal/gerrit/core/client/ProjectByNameComparator.java

/*******************************************************************************
 * Copyright (c) 2014 The Eclipse Foundation 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:
 *     Vadim Dmitriev - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.internal.gerrit.core.client;

import java.util.Comparator;

import com.google.gerrit.reviewdb.Project;

/**
 * Compares {@link com.google.gerrit.reviewdb.Project} by name, case insensitive, ascending, nulls last.
 *
 * @throws NullPointerException
 *             one or both parameters are null
 * @see com.google.gerrit.reviewdb.Project
 * @author Vadim Dmitriev
 */
public class ProjectByNameComparator implements Comparator<Project> {

	@Override
	public int compare(Project o1, Project o2) {
		if (o1 == null || o2 == null) {
			throw new NullPointerException("Project can not be null"); //$NON-NLS-1$
		}

		String o1Name = o1.getName();
		String o2Name = o2.getName();

		if (o1Name == null && o2Name == null) {
			return 0;
		} else if (o1Name == null) {
			return 1;
		} else if (o2Name == null) {
			return -1;
		} else {
			return o1Name.compareToIgnoreCase(o2Name);
		}
	}

}