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From "Vladimir Ivanov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-846) [classlib][io] unexpected exceptions for ObjectInputStream().read<Object> methods
Date Wed, 12 Jul 2006 06:12:29 GMT
[classlib][io] unexpected exceptions for ObjectInputStream().read<Object> methods
---------------------------------------------------------------------------------

         Key: HARMONY-846
         URL: http://issues.apache.org/jira/browse/HARMONY-846
     Project: Harmony
        Type: Bug

  Components: Classlib  
    Reporter: Vladimir Ivanov


The Harmony methods of the java.io.ObjectInputStream class have different behavior in compare
with RI:
1)  For readObject() and readObjectOverride() Harmony throws IOException while RI returns
null
2)  For readClassDescriptor() Harmony throws NotActiveException while RI throws NPE

==================== test.java =======================
import java.io.*;

public class test  { 
    public static void main (String[] args) {   
       try {
           System.out.println("readObject = " + new testObjectInputStream().readObject());
                                      
       } catch (Exception e) {
           e.printStackTrace();
       } 
       try {
           System.out.println("readObjectOverride = " + new testObjectInputStream().readObjectOverride());
       } catch (Exception e) {
           e.printStackTrace();
       }  
       try {
           System.out.println("readClassDescriptor = " + new testObjectInputStream().readClassDescriptor());
       } catch (Exception e) {
           e.printStackTrace();
       }       
    }
}

class testObjectInputStream extends ObjectInputStream {
    public testObjectInputStream() throws IOException{
        super();
    }
    public Object readObjectOverride() throws IOException,  ClassNotFoundException{
        return super.readObjectOverride();
    }
    public ObjectStreamClass readClassDescriptor() throws IOException,  ClassNotFoundException{
        return super.readClassDescriptor();
    }
}
==================================================

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))

readObject = null
readObjectOverride = null
java.lang.NullPointerException
        at java.io.ObjectInputStream.readUTF()Ljava.lang.String;(Unknown Source)
        at java.io.ObjectStreamClass.readNonProxy(Ljava.io.ObjectInputStream;)V(Unknown Source)
        at java.io.ObjectInputStream.readClassDescriptor()Ljava.io.ObjectStreamClass;(Unknown
Source)
        at testObjectInputStream.readClassDescriptor(test.java:31)
        at test.main(test.java:16)

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.
java.io.IOException
        at java.io.ObjectInputStream.readObjectOverride(ObjectInputStream.java:2072)
        at testObjectInputStream.readObjectOverride(test.java:28)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2006)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1976)
        at test.main(test.java:6)
java.io.IOException
        at java.io.ObjectInputStream.readObjectOverride(ObjectInputStream.java:2072)
        at testObjectInputStream.readObjectOverride(test.java:28)
        at test.main(test.java:11)
java.io.NotActiveException
        at java.io.ObjectInputStream.readClassDescriptor(ObjectInputStream.java:1667)
        at testObjectInputStream.readClassDescriptor(test.java:31)
        at test.main(test.java:16)

 


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