Name: vtR10009 Date: 07/11/2002


  Specification for the method Sequencer.getTrackMute() from the
package javax.sound.midi reads:
".. This applies if the sequencer does not support muting of tracks, and
if the specified track index is not valid.
Parameters:
   track - the track number. Tracks in the current sequence are numbered
   from 0 to the number of tracks in the sequence minus 1."

But default Sequencer erroneously allows to set Mute state for
nonexistent track.

This bug causes failure of new JCK test:
  api/javax_sound/midi/Sequencer/index.html#MuteSolo
To reproduce the bug run the following test with JDK build 1.4.1-rc-b16:
------------------------------- test.java --------------------------------
import java.io.*;
import java.net.*;
import javax.sound.midi.*;

public class test {

    public static void main(String args[]) {
        boolean failed = false;
        Sequencer seq = null;
    
        Sequence midiData = null;
        URL seqURL = null;
        int numTracks;
    
        try {
            seq = MidiSystem.getSequencer();
            seq.open();
    
            seqURL = new URL(args[0]);
            midiData = MidiSystem.getSequence(seqURL);
            seq.setSequence(midiData);
            numTracks = midiData.getTracks().length;
            System.err.println("TrackMute state was: " +
seq.getTrackMute(numTracks));
            seq.setTrackMute(numTracks, true);
            if (seq.getTrackMute(numTracks)) {
                System.err.println("TrackMute state must not be set for
nonexistent "
                        + "track! " + seq.getTrackMute(numTracks));
                failed = true;
            }
    
        } catch (MidiUnavailableException mue) {
            System.err.println("MidiUnavailableException was thrown: " + mue);
            System.err.println("could not test.");
            failed = true;
        } catch (InvalidMidiDataException imEx) {
            imEx.printStackTrace();
            System.err.println("InvalidMidiDataException was thrown.");
            failed = true;
        } catch (IOException ioe) {
            System.err.println("Could not open the midi file.");
            failed = true;
        } finally {
            if (seq != null) seq.close();
        }
        
        if( failed ) {
            System.err.println("test failed");
            System.exit(1);
        } else {
            System.out.println("OKAY");
            System.exit(0);
        }
        
    }
}

---------------------------Logs-------------------------------------------
novo101:templates$ javac test.java; java -showversion test
file://`pwd`/metatest.mid
java version "1.4.1-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-rc-b16)
Java HotSpot(TM) Client VM (build 1.4.1-rc-b16, mixed mode)

TrackMute state was: false
TrackMute state must not be set for nonexistent track! true
test failed
--------------------------------------------------------------------------
======================================================================