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From "Tim Ellison (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HARMONY-802) [classlib][nio] java.nio.ByteBuffer.compareTo( ByteBuffer) returns wrong value
Date Fri, 07 Jul 2006 16:07:31 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-802?page=all ]
     
Tim Ellison resolved HARMONY-802:
---------------------------------

    Resolution: Fixed

Thanks Vladimir,

Your problem was fixed in NIO and LUNI modules at repo revision r419915.

I chose a slightly different way to fix the problem so that not all allocations via platform
address have zeroed memory.
I did take your regression test, thank you.

Please check that the fix fully resolves your problem.



> [classlib][nio] java.nio.ByteBuffer.compareTo( ByteBuffer) returns wrong value
> ------------------------------------------------------------------------------
>
>          Key: HARMONY-802
>          URL: http://issues.apache.org/jira/browse/HARMONY-802
>      Project: Harmony
>         Type: Bug

>   Components: Classlib
>     Reporter: Vladimir Ivanov
>     Assignee: Tim Ellison
>  Attachments: ByteBufferTest.patch, PlatformAddress.patch
>
> Method must return: "A negative integer, zero, or a positive integer as this buffer is
less than, equal to, or greater than the given buffer".
> But in the Harmony implementation the ByteBuffer.allocateDirect()  and ByteBuffer.wrap(new
byte[]) does not equals due to different initialization symbols (it is easy to catch if add
debug message to the ByteBuffer.compareTo() method).
> ===================== test.java =======================
> import java.nio.*;
> public class test  { 
>     public static void main (String[] args) {   
>        try {                                                                        
    
>             System.out.println(ByteBuffer.wrap(new byte[839]).compareTo(ByteBuffer.allocateDirect(137)));
>        } catch (Exception e) {
>            e.printStackTrace();
>        }    
>     }
> }
> ===================================================
> Output:
> C:\tmp\tmp17>C:\jrockit-jdk1.5.0-windows-ia32\bin\java.exe -showversion test
> java version "1.5.0"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
> BEA WebLogic JRockit(R) (build dra-38972-20041208-2001-win-ia32, R25.0.0-75, GC: System
optimized over throughput (initial strategy singleparpar))
> 702
> C:\tmp\tmp17>C:\harmony\trunk_0427\deploy\jdk\jre\bin\java.exe -showversion test
> java version 1.5 (subset)
> (c) Copyright 1991, 2006 The Apache Software Foundation or its licensors, as applicable.
> thisByte = 0, otherByte = 31
> -1

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