[jira] Created: (HARMONY-81) java.util.zip.Inflater.infalate() throws DataFormatException instead of actual number of uncompressed bytes

["Svetlana Samoilenko (JIRA)" <ji...@apache.org>]

java.util.zip.Inflater.infalate() throws DataFormatException instead of actual number of uncompressed bytes
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         Key: HARMONY-81
         URL: http://issues.apache.org/jira/browse/HARMONY-81
     Project: Harmony
        Type: Bug
  Components: Classlib  
    Reporter: Svetlana Samoilenko


Description:
According to the j2se 1.4 and 1.5 specification method java.util.zip.Inflater.infalate(byte [] b, int off, int length ) returns actual number of bytes uncompressed and throws DataFormatException if the compressed data format is invalid.
The test listed below shows that Harmony throws DataFormatException instead of return 0 (actual number of  uncompressed bytes).

Code to reproduce: 
import java.util.zip.*; 

public class test2 { 
    public static void main(String[] args){ 
       Inflater inf = new Inflater();        
       try { 
          System.out.println("Inflater.inflate() = "+inf.inflate(new byte[0], 0, 0)); 
       } catch(DataFormatException e) { 
          e.printStackTrace(); 
       } 
} 

} Steps to Reproduce: 
1. Build Harmony (check-out on 2006-01-30) j2se subset as described in README.txt. 
2. Compile test2.java using BEA 1.4 javac 
> javac -d . test2.java 
3. Run java using compatible VM (J9) 
> java -showversion test2

Output: 
C:\tmp>C:\jrockit-j2sdk1.4.2_04\bin\java.exe -showversion test2 
java version "1.4.2_04" 
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05) 
BEA WebLogic JRockit(TM) 1.4.2_04 JVM (build ari-31788-20040616-1132-win-ia32, Native Threads, GC strategy: parallel) 
Inflater.inflate() = 0


C:\tmp>C:\harmony\trunk\deploy\jre\bin\java -showversion test2 
(c) Copyright 1991, 2005 The Apache Software Foundation or its licensors, as applicable. 
java.util.zip.DataFormatException:
        at java.util.zip.Inflater.inflateImpl(Native Method)
        at java.util.zip.Inflater.inflate(Inflater.java:169)
        at test2.main(test2.java:7)
        
Suggested junit test case:
------------------------ InflaterTest.java ------------------------------------------------- 
import java.util.zip.*; 
import junit.framework.*; 

public class InflaterTest extends TestCase { 
     public static void main(String[] args) { 
        junit.textui.TestRunner.run(InflaterTest.class); 
     } 

     public void test_inflate () { 
       Inflater inf = new Inflater();        
       try { 
           int n=inf.inflate(new byte[0], 0, 0);         
           assertEquals(0, n); 
       } catch(DataFormatException e) { 
           fail("unexpected  DataFormatException");
       } 
    } 
}


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