Name: izR10247 Date: 12/05/2003



Current J2SE 1.5 b30 spec states following:
"
Interface Mixer

getTargetLineInfo

Line.Info[] getTargetLineInfo()

    Obtains information about the set of target lines supported by this
mixer. Some target lines may only be available when this mixer is open.

    Returns:
        array of Line.Info objects representing target lines for this
mixer. If no target lines are supported, an array of length 0 is returned.
"

However JDK1.5 b29 implementation raised unexpected
IllegalArgumentException while the test below tryes to
get target line using Line.Info array returned by
getTargetLineInfo().

This bug is reproducible on Linux when the user has no access
to sound services in a case of remote login (for users which do not
login to X-Windows).

The Mixer should not return any info about the
lines that is supported but is not actually accessible
in this case.

This bug affects following JCK 1.5 b11 tests:

api/javax_sound/AudioInputStream/index.html#Ctor[Ctor003]
api/javax_sound/AudioSystem/index.html#getLine[getLine001,getLine003,getLine004]
api/javax_sound/Mixer/index.html#Mixer[Mixer2002]
api/javax_sound/sampled/Mixer/index.html#getLine[getLine002]

To reproduce this bug please start the test using
script 'MyTest.sh' below:

=============== MyTest.java source begin ===============
import javax.sound.sampled.*;

public class MyTest {

    public static void main(String argv[]) {
        Mixer.Info [] infos = AudioSystem.getMixerInfo();

        for (int i=0; i<infos.length; i++) {
            Mixer mixer = AudioSystem.getMixer(infos[i]);
            System.out.println("Mixer is: " + mixer);
            Line.Info [] target_line_infos = mixer.getTargetLineInfo();
            for (int j = 0; j < target_line_infos.length; j++) {
                try {
                    System.out.println("Trying to get:" + target_line_infos[j]);
                    mixer.getLine(target_line_infos[j]);
                } catch (IllegalArgumentException iae) {
                    System.out.println("Unexpected IllegalArgumentException raised:" + iae);
                    iae.printStackTrace();
                } catch (LineUnavailableException lue) {
                    System.out.println("Unexpected IllegalArgumentException raised:" + lue);
                    lue.printStackTrace();
                }
            }
        }
    }
}
=============== MyTest.java source end =================
=============== MyTest.sh begin ========================
#!/bin/bash
export JDK='/net/linux-15/export/home/java/jdk1.5.0/linux'
# Generating info about operating system
uname -a
# Source compilation
$JDK/bin/javac MyTest.java
# Test running
$JDK/bin/java -showversion MyTest
=============== MyTest.sh end ==========================
=============== MyTest output begin ====================
Linux linux-11 2.4.18-14 #1 Wed Sep 4 13:35:50 EDT 2002 i686 i686 i386
GNU/Linux
java version "1.5.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b30)
Java HotSpot(TM) Client VM (build 1.5.0-beta-b30, mixed mode)

Mixer is: com.sun.media.sound.HeadspaceMixer@f9f9d8
Mixer is: com.sun.media.sound.SimpleInputDevice@112f614
Trying to get:interface TargetDataLine
Unexcpected IllegalArgumentException
raised:java.lang.IllegalArgumentException: Line unsupported: interface TargetDataLine
java.lang.IllegalArgumentException: Line unsupported: interface
TargetDataLine
        at com.sun.media.sound.SimpleInputDevice.getLine(SimpleInputDevice.java:160)
        at MyTest.main(MyTest.java:15)
=============== MyTest output end ======================
======================================================================