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From "Vladimir Ivanov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1103) [classlib][io] compatibility: different checks order for DataInputStream(null).readFully(byte[], int, int)
Date Tue, 08 Aug 2006 11:18:13 GMT
[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


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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