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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/sound/midi/MidiMessage.java
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+/* 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();
+}