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	/*
	* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* 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. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* 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, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package com.sun.media.sound;

	import javax.sound.midi.*;

	/**
	* an optimized ShortMessage that does not need an array
	*
	* @author Florian Bomers
	*/
	final class FastShortMessage extends ShortMessage {
	private int packedMsg;

	FastShortMessage(int packedMsg) throws InvalidMidiDataException {
	this.packedMsg = packedMsg;
	getDataLength(packedMsg & 0xFF); // to check for validity
	}

	/** Creates a FastShortMessage from this ShortMessage */
	FastShortMessage(ShortMessage msg) {
	this.packedMsg = msg.getStatus()
	\| (msg.getData1() << 8)
	\| (msg.getData2() << 16);
	}

	int getPackedMsg() {
	return packedMsg;
	}

	public byte[] getMessage() {
	int length = 0;
	try {
	// fix for bug 4851018: MidiMessage.getLength and .getData return wrong values
	// fix for bug 4890405: Reading MidiMessage byte array fails in 1.4.2
	length = getDataLength(packedMsg & 0xFF) + 1;
	} catch (InvalidMidiDataException imde) {
	// should never happen
	}
	byte[] returnedArray = new byte[length];
	if (length>0) {
	returnedArray[0] = (byte) (packedMsg & 0xFF);
	if (length>1) {
	returnedArray[1] = (byte) ((packedMsg & 0xFF00) >> 8);
	if (length>2) {
	returnedArray[2] = (byte) ((packedMsg & 0xFF0000) >> 16);
	}
	}
	}
	return returnedArray;
	}

	public int getLength() {
	try {
	return getDataLength(packedMsg & 0xFF) + 1;
	} catch (InvalidMidiDataException imde) {
	// should never happen
	}
	return 0;
	}

	public void setMessage(int status) throws InvalidMidiDataException {
	// check for valid values
	int dataLength = getDataLength(status); // can throw InvalidMidiDataException
	if (dataLength != 0) {
	super.setMessage(status); // throws Exception
	}
	packedMsg = (packedMsg & 0xFFFF00) \| (status & 0xFF);
	}


	public void setMessage(int status, int data1, int data2) throws InvalidMidiDataException {
	getDataLength(status); // can throw InvalidMidiDataException
	packedMsg = (status & 0xFF) \| ((data1 & 0xFF) << 8) \| ((data2 & 0xFF) << 16);
	}


	public void setMessage(int command, int channel, int data1, int data2) throws InvalidMidiDataException {
	getDataLength(command); // can throw InvalidMidiDataException
	packedMsg = (command & 0xF0) \| (channel & 0x0F) \| ((data1 & 0xFF) << 8) \| ((data2 & 0xFF) << 16);
	}


	public int getChannel() {
	return packedMsg & 0x0F;
	}

	public int getCommand() {
	return packedMsg & 0xF0;
	}

	public int getData1() {
	return (packedMsg & 0xFF00) >> 8;
	}

	public int getData2() {
	return (packedMsg & 0xFF0000) >> 16;
	}

	public int getStatus() {
	return packedMsg & 0xFF;
	}

	/**
	* Creates a new object of the same class and with the same contents
	* as this object.
	* @return a clone of this instance.
	*/
	public Object clone() {
	try {
	return new FastShortMessage(packedMsg);
	} catch (InvalidMidiDataException imde) {
	// should never happen
	}
	return null;
	}

	} // class FastShortMsg

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