/*
 * 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;

import sun.evtracing.parser.TraceEventType;
import sun.evtracing.parser.metadata.JavaThread;
import sun.evtracing.parser.metadata.MetadataRef;
import sun.evtracing.processing.TraceEventHandler;

public class ThreadStateChangeEvent extends TimestampedEvent {

	public static final TraceEventType EVENT_TYPE = TraceEventType.ThreadStateChange;

	public static ThreadStateChangeEvent parse(TraceReader reader, long thread) {
		TraceEventType eventType = reader.readEventType();
		assert eventType == EVENT_TYPE;
		long timestamp = reader.readTimestamp();
		MetadataRef<JavaThread> affectedThread = reader.readThread();
		ThreadState newState = reader.readThreadState();
		return new ThreadStateChangeEvent(thread, timestamp, affectedThread, newState);
	}

	private final MetadataRef<JavaThread> affectedThread;
	private final ThreadState newState;

	protected ThreadStateChangeEvent(long thread, long timestamp, MetadataRef<JavaThread> affectedThread, ThreadState newState) {
		super(thread, timestamp);
		this.affectedThread = affectedThread;
		this.newState = newState;
	}

	@Override
	public TraceEventType type() {
		return EVENT_TYPE;
	}

	public MetadataRef<JavaThread> affectedThread() {
		return affectedThread;
	}

	public ThreadState newState() {
		return newState;
	}

	@Override
	public void accept(TraceEventHandler handler) {
		handler.threadStateChange(this);
	}
}