FULL PRODUCT VERSION :
java version "1.4.2_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_06-b03)
Java HotSpot(TM) Client VM (build 1.4.2_06-b03, mixed mode)


A DESCRIPTION OF THE PROBLEM :
Problems faced is described below
1) flush() and close() methods of the OutputStreamWriter are inconsistent
2) encode(CharBuffer in) method in the CharsetEncoder is misbehaving.

CharsetEncoder#flush wasn't call appropriate in OutputStreamWriter#flush and in CharsetEncoder#encode(CharBuffer) (?).

test code below.

import java.io.*;
import java.nio.*;
import java.nio.charset.*;

class Test {
    public static void main(String[] args) throws Exception {
        String m = "\u3042\u3043\u3044";
        System.out.println("expect result was:");
        System.out.println("1B 24 42 24 22 24 23 24 24 1B 28 42");
        System.out.println();

        System.out.println("test getBytes");
        System.out.println(dump(m.getBytes("ISO-2022-JP"))); // OK
        System.out.println();

        System.out.println("test OutputStreamWriter with close");
        ByteArrayOutputStream b = new ByteArrayOutputStream();
        OutputStreamWriter w = new OutputStreamWriter(b, "ISO-2022-JP");
        w.write(m.toCharArray());
        w.close();
        System.out.println(dump(b.toByteArray())); // OK
        System.out.println();

        System.out.println("test OutputStreamWriter with flush");
        b = new ByteArrayOutputStream();
        w = new OutputStreamWriter(b, "ISO-2022-JP");
        w.write(m.toCharArray());
        w.flush();
        System.out.println(dump(b.toByteArray())); // NG: not call CharsetEncoder#flush
        System.out.println();

        System.out.println("test CharsetEncoder#encode(CharBuffer)");
        CharsetEncoder e = Charset.forName("ISO-2022-JP").newEncoder();
        ByteBuffer buf = e.encode(CharBuffer.wrap(m));
        System.out.println(dump(buf.array())); // NG
        System.out.println();

        System.out.println("test CharsetEncoder#encode(CharBuffer, ByteBuffer, boolean)");
        /*
        e.reset(); // don't work(another bug in sun.nio.cs.ext.ISO2022_JP#reset)
        /*/
        e = Charset.forName("ISO-2022-JP").newEncoder();
        //*/
        buf = ByteBuffer.allocate(64);
        System.out.println(e.encode(CharBuffer.wrap(m), buf, true));
        System.out.println(e.flush(buf)); // <- required
        System.out.println(dump(buf.array())); // OK
    }


    public static String dump(byte[] bytes) {
        StringBuffer s = new StringBuffer();
        for (int i = 0; i < bytes.length; i++) {
            s.append("0123456789ABCDEF".charAt(bytes[i] >> 4 & 0x0f));
            s.append("0123456789ABCDEF".charAt(bytes[i]      & 0x0f));
            s.append(' ');
        }
        return new String(s);
    }
}


P.S. CharsetEncoder#reset() doesn't work at ISO-2022-JP encoder.



REPRODUCIBILITY :
This bug can be reproduced always.
###@###.### 2004-12-21 11:13:14 GMT