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From "Richard Liang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-173) java.nio.charset.CharsetEncoder.encode method does not reserve remaining bytes for next invocation.
Date Mon, 06 Mar 2006 12:24:31 GMT
java.nio.charset.CharsetEncoder.encode method does not reserve remaining bytes for next invocation.
---------------------------------------------------------------------------------------------------

         Key: HARMONY-173
         URL: http://issues.apache.org/jira/browse/HARMONY-173
     Project: Harmony
        Type: Bug
  Components: Classlib  
    Reporter: Richard Liang


Method 
public final CoderResult encode(CharBuffer in,
                                ByteBuffer out,
                                boolean endOfInput)
Considering that there is a supplemental character which represents by 4 bytes like "\ud800\udc00",
and it was divided into two input buffers. e.g. "\ud800" is at the end of input1 and the "\udc00"
is at the begining of input2. when invoking the method encode(input1,out,false), it deals
with "\ud800" as a malformed charactor and I think it should be reversed for next invocation
like encode(input2,out,true).

And it aslo must be handled correspondingly in method public final ByteBuffer encode(CharBuffer
in).

===Test segment to reproduce the bug (fail on RI 5.0 and Harmony. I think it's also a bug
for RI 5.0)

		CharsetEncoder encoder = Charset.forName("utf-8").newEncoder();
		CharBuffer in1 = CharBuffer.wrap("\ud800");
		CharBuffer in2 = CharBuffer.wrap("\udc00");
		ByteBuffer out = ByteBuffer.allocate(4);
		encoder.reset();
		CoderResult result = encoder.encode(in1, out, false);
		assertEquals(4, out.remaining());
		assertTrue(result.isUnderflow());
		result = encoder.encode(in2, out, true);
		assertEquals(0, out.remaining());
		assertTrue(result.isUnderflow());


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