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From "Paulex Yang (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HARMONY-1103) [classlib][io] compatibility: different checks order for DataInputStream(null).readFully(byte[], int, int)
Date Mon, 18 Sep 2006 06:44:25 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-1103?page=all ]

Paulex Yang resolved HARMONY-1103.
----------------------------------

    Resolution: Fixed

Tony, patch applied at revision r447286, thanks a lot for this enhancement.

Vladimir, please verify that the problem is fully fixed as you expected.

> [classlib][io] compatibility: different checks order for DataInputStream(null).readFully(byte[],
int, int)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-1103
>                 URL: http://issues.apache.org/jira/browse/HARMONY-1103
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Vladimir Ivanov
>         Assigned To: Paulex Yang
>         Attachments: DataInputStream.patch, harmony-1103.diff
>
>
> The harmony method java.io.DataInputStream(null).readFully(byte[], int, int) initially
checks boundary values while RI checks stream.
> It leads to different exceptions: NPE for RI and IndexOutOfBoundsException for Harmony.
> ================= test.java =======================
> import java.io.DataInputStream;
> public class test {
>     public static void main(String args[]) throws Exception {
>         new DataInputStream(null).readFully(new byte[] {2, 2, 2, 2}, 1, 18);
>     }
> }
> ===============================================
> Output:
> C:\tmp\tmp17>C:\jrockit-jdk1.5.0-windows-ia32\bin\java.exe -cp . -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))
> java.lang.NullPointerException
>         at java.io.DataInputStream.readFully(DataInputStream.java:176)
>         at test.main(test.java:5)
> C:\tmp\tmp17>C:\harmony\trunk_0427\deploy\jdk\jre\bin\java.exe -cp . -showversion
test
> java version 1.5 (subset)
> (c) Copyright 1991, 2006 The Apache Software Foundation or its licensors, as applicable.
> Exception in thread "main" java.lang.IndexOutOfBoundsException
>         at java.io.DataInputStream.readFully(DataInputStream.java:205)
>         at test.main(test.java:5)

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