RFE: override equals() method in info classes

Name: vtR10009 Date: 04/05/2002


  Specification for the method MidiDevice.Info.equals() from the package
javax.sound.midi reads:
"Reports whether two objects are equal. Returns true if the objects
are identical.
  Overrides: equals in class Object."
  
  But reference implementation does not override Object.equals() method
and fails for identical instances. The same is true for hashCode()
method.

This bug causes failure of new JCK test:
  api/javax_sound/midi/MidiDevice/index.html#TypeCtor
  
To reproduce the bug run the following test with JDK build 1.4.1-beta-b07:
------------------------------- test.java --------------------------------
import javax.sound.midi.*;
import java.io.*;


public class test {

    public static void main(String args[]) {
        boolean failed = false;
        String name = "name";
        String vendor = "vendor";
        String descr = "description";
        String ver = "version";
        String sameName = "name";
        MidiDevice.Info dInfo1 = new DevInfo(name, vendor, descr, ver);
        MidiDevice.Info dInfo2 = new DevInfo(name, vendor, descr, ver);

        if (!dInfo1.equals(dInfo2)) {
            System.out.println("These devices must be equal!");
            System.out.println("Device:" + dInfo1);
            System.out.println("Device:" + dInfo2);
            failed = true;
        }
        dInfo2 = new DevInfo(sameName, vendor, descr, ver);
        if (!dInfo1.equals(dInfo2)) {
            System.out.println("These devices must be equal too!");
            System.out.println("Device:" + dInfo1);
            System.out.println("Device:" + dInfo2);
            failed = true;
        }
    
        if( failed == true ) {
            System.out.println("Test failed!");
        } else {
            System.out.println("OK.");
        }
        System.exit(0);
    }
}

class DevInfo extends MidiDevice.Info {
    DevInfo(String n,String v1,String d,String v2) {
    super(n,v1,d,v2);
    }
}
---------------------------Logs-------------------------------------------
novo101:templates$ javac test.java; java -showversion test
java version "1.4.1-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-beta-b07)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b07, mixed mode)

These devices must be equal!
Device:name
Device:name
These devices must be equal too!
Device:name
Device:name
Test failed!

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======================================================================

###@###.### 2002-09-25
This RFE applies to the following classes:
AudioFileFormat
AudioFileFormat.Type
AudioFormat
AudioFormat.Encoding
Control.Type
DataLine.Info
Line.Info
LineEvent.Type
Mixer.Info
Port.Info
ReverbType
Instrument
MetaMessage
MidiDevice.Info
MidiEvent
MidiFileFormat
MidiMessage
Patch
Sequencer.SyncMode
ShortMessage
SoundbankResource
SysexMessage