bug-to-bug compatibility - another issue

Following the discussion before, I have another issue about RI's "bug",

try this little test below:

import java.nio.charset.*;
public class DecoderTest{
   public static void main(String[] args){
           CharsetDecoder decoder = Charset.forName("utf-8").newDecoder();
       decoder.reset();
       decoder.flush(CharBuffer.allocate(10));
   }
}

It quits quietly on Harmony, while on RI(JDK 5.0/1.4.2), it throws 
exception like below:
java.lang.IllegalStateException: Current state = RESET, new state = FLUSHED
   at 
java.nio.charset.CharsetDecoder.throwIllegalStateException(Unknown Source)
   at java.nio.charset.CharsetDecoder.flush(Unknown Source)
   ........

But the spec of CharsetDecoder.flush() says:

Throws:
   IllegalStateException - If the previous step of the current decoding 
operation was an invocation neither of the reset method nor of the 
three-argument decode method with a value of true for the endOfInput 
parameter

It's so interesting that the spec emphasizes it SHOULD NOT throw 
IllegalStateException when flush() just after reset().

In fact, this is just one example of contradiction between spec and RI's 
CharsetDecoder/Encoder internal status implementation. These *bugs*  are 
serious so that the RI's Decoder/Encoder must be used by experiment. 
Should Harmony be compatible with RI?



--
Paulex Yang
China Software Development Lab
IBM