On 20/Jul/2010 04:16, Deven You wrote:
> Hi Tim,
> I have write a test case which simulate the behavior of OutputStreamWriter
> and fail on RI but pass on harmony trunk.
yes, and the discussion of how CharsetEncoder behaves is the first thing
-- but then we should look at how the OutputStreamWriter uses the
encoder. Its not clear to me yet that there is a problem to fix in
OutputStreamWriter.
Regards,
Tim
> import java.nio.ByteBuffer;
> import java.nio.charset.Charset;
> import java.nio.charset.CharsetEncoder;
> import java.nio.charset.CodingErrorAction;
> import java.security.AccessController;
>
> import org.apache.harmony.luni.util.PriviAction;
>
> public class TestCharsetEncoderFlush {
> private static ByteBuffer bytes = ByteBuffer.allocate(8192);
> private static CharsetEncoder encoder;
>
> public static void main(String[] args) {
> String encoding = AccessController
> .doPrivileged(new PriviAction<String>(
> "file.encoding", "ISO8859_1")); //$NON-NLS-1$ //$NON-NLS-2$
> encoder = Charset.forName(encoding).newEncoder();
> encoder.onMalformedInput(CodingErrorAction.REPLACE);
> encoder.onUnmappableCharacter(CodingErrorAction.REPLACE);
> encoder.flush(bytes);
> System.out.println("should not reach here");
>
> }
>
> }
>
> RI output:
> Exception in thread "main" java.lang.IllegalStateException: Current state =
> RESET, new state = FLUSHED
> at
> java.nio.charset.CharsetEncoder.throwIllegalStateException(CharsetEncoder.java:951)
> at java.nio.charset.CharsetEncoder.flush(CharsetEncoder.java:640)
> at
> ydw.arena7.luni.test.TestCharsetEncoderFlush.main(TestCharsetEncoderFlush.java:27)
> Harmony trunk output:
> should not reach here
>
> It proves our CharsetEncoder indeed does not follow the spec and RI. I will
> create a jira with this test case and figure out how to solve this problem.
>>From the spec, seems we need track every step of CharsetEncoder invocation,
> but it looks silly, dose anyone have better suggestion for this problem.
> Thanks a lot!
>
> ---------- Forwarded message ----------
> From: Tim Ellison (JIRA) <j...@apache.org>
> Date: 2010/7/19
> Subject: [jira] Commented: (HARMONY-6590) [classlib][luni]A issue about
> CharsetEncoder.flush() in the OutputStreamWriter.close()
> To: devyo...@gmail.com
>
>
>
> [
> https://issues.apache.org/jira/browse/HARMONY-6590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889841#action_12889841]
>
> Tim Ellison commented on HARMONY-6590:
> --------------------------------------
>
> Interesting that this code does not fail on the RI, note that the encoder is
> in the 'wrong' state.
>
> OutputStream os = new ByteArrayOutputStream();
> CharsetEncoder cse = Charset.defaultCharset().newEncoder();
> cse.encode(CharBuffer.wrap("Simple"), ByteBuffer.allocate(42),
> false);
> OutputStreamWriter bw = new OutputStreamWriter(os, cse);
> bw.flush();
> bw.close();
>
> Maybe the flush() doesn't flush the encoder.
>
>> [classlib][luni]A issue about CharsetEncoder.flush() in the
> OutputStreamWriter.close()
> --------------------------------------------------------------------------------------
>> Key: HARMONY-6590
>> URL: https://issues.apache.org/jira/browse/HARMONY-6590
>> Project: Harmony
>> Issue Type: Bug
>> Components: Classlib
>> Affects Versions: 5.0M14
>> Reporter: deven you
>> Assignee: Tim Ellison
>> Attachments: HARMONY-6590.diff
>>
>> Original Estimate: 96h
>> Remaining Estimate: 96h
>>
>> Today I read through the OutputStreamWrtier.close() code below:
>> public void close() throws IOException {
>> synchronized (lock) {
>> if (encoder != null) {
>> encoder.flush(bytes);
>> flush();
>> out.flush();
>> out.close();
>> encoder = null;
>> bytes = null;
>> }
>> }
>> }
>> I remember the java spec says for the CharsetEncoder.flush():
> IllegalStateException - If the previous step of the current encoding
> operation was an invocation neither of the reset method nor of the
> three-argument encode method with a value of true for the endOfInput
> parameter.
>> Obviously OutputStreamWrtier.close() does not check this prerequisite
> before invoking the encoder.flush(bytes). So I write a test case[1] to check
> this issue but it passed, I think it is because our CharsetEncoder.flush()
> does not follow the spec.
>> Though I think our OutputStreamWrtier.close() should modify to follow the
> spec. I have put the patch[1] on this jira.
>> And I will also look into the CharsetEncoder.flush() to investigate this
> problem.
>> [1] see the attached patch
>
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