/*
 * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved.
 * 
 * This file is part of the Lock Contention Tracing Subsystem for the HotSpot
 * Virtual Machine, which is developed at Christian Doppler Laboratory on
 * Monitoring and Evolution of Very-Large-Scale Software Systems. Please
 * contact us at <http://mevss.jku.at/> if you need additional information
 * or have any questions.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work. If not, see <http://www.gnu.org/licenses/>.
 *
 */
package sun.evtracing.parser.metadata;

import java.util.Comparator;
import sun.evtracing.parser.metadata.JavaMethod;

public class JavaMethodDeepComparator implements Comparator<JavaMethod> {

	public static final JavaMethodDeepComparator INSTANCE = new JavaMethodDeepComparator();

	@Override
	public int compare(JavaMethod o1, JavaMethod o2) {
		if (o1 == o2) {
			return 0;
		}
		if (o1.isSpecial() && o2.isSpecial()) {
			if (o1.equals(o2)) {
				return 0;
			}
		}
		if (o1.isSet() && !o2.isSet()) {
			return 1;
		}
		if (!o1.isSet() && o2.isSet()) {
			return -1;
		}
		if (!o1.isSet() && !o2.isSet()) {
			return System.identityHashCode(o1) - System.identityHashCode(o2);
		}
		int result = JavaClassDeepComparator.INSTANCE.compare(o1.clazz(), o2.clazz());
		if (result == 0) {
			result = o1.name().compareTo(o2.name());
			if (result == 0) {
				result = o1.signature().compareTo(o2.signature());
			}
		}
		return result;
	}

}