/*
 * 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.processing.statistics.aggregator;

import java.util.EnumSet;
import sun.evtracing.processing.statistics.metadata.Contention;
import sun.evtracing.processing.statistics.metadata.Group;

public class GroupContentionFilter implements ContentionProcessor {

	private final ContentionProcessor delegate;

	private final EnumSet<Group> allowedGroups;

	private long unaccountedContentionTime = 0;

	public GroupContentionFilter(ContentionProcessor delegate, EnumSet<Group> allowedGroups) {
		this.delegate = delegate;
		this.allowedGroups = allowedGroups;
	}

	@Override
	public void submit(Contention c) {
		if (allowedGroups.contains(c.group)) {
			delegate.submit(c);
		} else {
			if (c.group != Group.Uncontended) {
				unaccountedContentionTime += c.duration;
			}
		}
	}

	@Override
	public void merge() {
		delegate.merge();
	}

	public long unaccountedContentionTime() {
		return unaccountedContentionTime;
	}

}