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Diffstat (limited to 'libjava/classpath/javax/sound/midi/MidiMessage.java')
-rw-r--r-- | libjava/classpath/javax/sound/midi/MidiMessage.java | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/libjava/classpath/javax/sound/midi/MidiMessage.java b/libjava/classpath/javax/sound/midi/MidiMessage.java new file mode 100644 index 000000000..806615199 --- /dev/null +++ b/libjava/classpath/javax/sound/midi/MidiMessage.java @@ -0,0 +1,126 @@ +/* MidiMessage.java -- base class for MIDI messages. + Copyright (C) 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.sound.midi; + +/** + * The base class for all MIDI messages. + * + * @author Anthony Green (green@redhat.com) + * @since 1.3 + * + */ +public abstract class MidiMessage implements Cloneable +{ + /** + * MIDI message data. + */ + protected byte data[]; + + /** + * The total length of the MIDI message. + */ + protected int length; + + /** + * MidiMessage contructor. + * + * @param data a valid MIDI message + */ + protected MidiMessage(byte[] data) + { + this.data = data; + this.length = data.length; + } + + /** + * Set the complete MIDI message. + * + * @param data The complete MIDI message. + * @param length The length of the MIDI message. + * @throws InvalidMidiDataException Thrown when the MIDI message is invalid. + */ + protected void setMessage(byte[] data, int length) + throws InvalidMidiDataException + { + this.data = new byte[length]; + System.arraycopy(data, 0, this.data, 0, length); + this.length = length; + } + + /** + * Get the MIDI message data. + * + * @return an array containing the MIDI message data + */ + public byte[] getMessage() + { + byte copy[] = new byte[length]; + System.arraycopy(data, 0, copy, 0, length); + return copy; + } + + /** + * Get the status byte of the MIDI message (as an int) + * + * @return the status byte of the MIDI message (as an int), or zero if the message length is zero. + */ + public int getStatus() + { + if (length > 0) + return (data[0] & 0xff); + else + return 0; + } + + /** + * Get the length of the MIDI message. + * + * @return the length of the MIDI messsage + */ + public int getLength() + { + return length; + } + + /* Create a clone of this object. + * + * @see java.lang.Object#clone() + */ + public abstract Object clone(); +} |