The implemetion is from ICU, so, I think we'd better not to wrap it by ourselves. I'll post to ICU mailing list and ask if they can help to supply these legacy charsets.
On 10/19/06, Andrew Zhang <[EMAIL PROTECTED]> wrote:
On 10/19/06, Tony Wu <[EMAIL PROTECTED]> wrote: > > Thank you all, > It is not just an issue about name. > The precondition of mapping is that ICU has really supported this > charset. AFAIK UnicodeBig is not implemented by ICU, refer to [1]. > Shall we map the UnicodeBit&UnicodeLittle to UTF-16 as work around[2]? No, I don't think so. The only difference between "UnicodeBig" and "UTF-16BE" is with/without byte-order mark. So it should be easy to wrap "UTF-16BE" as "UnicodeBig" for java.io/java.lang. Just put 0xFE 0xFF at the begining of the bytes and then encode the buffer as "UTF-16BE". Do I miss something? [1]http://dev.icu- > project.org/cgi-bin/viewcvs.cgi/icu/source/data/mappings/convrtrs.txt?view=co > > [2] > UTF-16 > Sixteen-bit UCS Transformation Format, byte order identified by an > optional byte-order mark > UnicodeBig > Sixteen-bit Unicode Transformation Format, big-endian byte order, > with byte-order mark > UnicodeLittle > Sixteen-bit Unicode Transformation Format, little-endian byte order, > with byte-order mark > > On 10/17/06, Paulex Yang <[EMAIL PROTECTED]> wrote: > > Tony Wu wrote: > > > Thank you Andrew, > > > I think I got the point. The j.l.String of RI uses the encoding of IO > > > whereas Charset.forName use another of NIO. > > > > > > And the new problem is shall we follow the spec[1] to support the two > > > suites of charset implemetation? I just have a look and find we does > > > not support some Canonical Name for java.io and java.lang API such as > > > UnicodeBigUnmarked,UnicodeLittleUnmarked,UnicodeBig,Unicodelittle,etc. > > There is such a charset name mapping in InputStreamReader, I think we > > have no choice but to support these legacy charset names, you may need > > some refactory work to make these classes use the same mapping data. > > > > > > [1] http://java.sun.com/j2se/1.5.0/docs/guide/intl/encoding.doc.html > > > > > > On 10/17/06, Andrew Zhang <[EMAIL PROTECTED]> wrote: > > >> On 10/17/06, Andrew Zhang <[EMAIL PROTECTED]> wrote: > > >> > > > >> > > > >> > > > >> > On 10/17/06, Leo Li <[EMAIL PROTECTED]> wrote: > > >> > > > > >> > > I think Harmony is more reasonable. > > >> > > > > >> > > As spec says, if Charset.forName("UnicodeBig") throws > > >> > > .UnsupportedCharsetException then no support for the named > > >> charset is > > >> > > available in this instance of the Java virtual machine. Then how > > >> can we > > >> > > get > > >> > > new String(b, "UnicodeBig") without throwing > > >> UnsupportedCharsetException > > >> > > on > > >> > > the same jvm? The spec for String(byte[] bytes,String > > >> charsetName) also > > >> > > says > > >> > > if the named charset is not supported, > UnsupportedCharsetException > > >> > > should be > > >> > > thrown out. > > >> > > > >> > > > >> > UNICODEBIG is a java alias for UTF-16BE. I think we'd better > > >> support such > > >> > mapping in String and follow RI. > > >> > > > >> > > >> You can find the encoding set from spec. [1] > > >> > > >> [1] http://java.sun.com/j2se/1.5.0/docs/guide/intl/encoding.doc.html > > >> > > >> On 10/17/06, Tony Wu <[EMAIL PROTECTED]> wrote: > > >> > > > > > >> > > > Hi all, > > >> > > > I found this when I tried to debug the failure tests of ant on > > >> > > > harmony. Note the output of testcases below. > > >> > > > > > >> > > > import java.io.UnsupportedEncodingException; > > >> > > > import java.nio.charset.Charset ; > > >> > > > import junit.framework.TestCase; > > >> > > > > > >> > > > public class TestCharset extends TestCase { > > >> > > > public void test1() throws UnsupportedEncodingException { > > >> > > > byte[] b = new byte[] { 'a', 'b', 'c' }; > > >> > > > String s = new String(b, "UnicodeBig"); > > >> > > > assertEquals("abc", s); > > >> > > > } > > >> > > > > > >> > > > public void test2() { > > >> > > > Charset.forName("UnicodeBig"); > > >> > > > } > > >> > > > } > > >> > > > > > >> > > > RI: > > >> > > > test1: junit.framework.ComparisonFailure: expected:<abc> but > > >> was:<> > > >> > > > test2: java.nio.charset.UnsupportedCharsetException: UnicodeBig > > >> > > > > > >> > > > Harmony: > > >> > > > test1:java.nio.charset.UnsupportedCharsetException: UnicodeBig > > >> > > > test2: > > >> > > > java.nio.charset.UnsupportedCharsetException: The unsupported > > >> charset > > >> > > > name is "UnicodeBig" > > >> > > > > > >> > > > seems RI can recognize the *UnicodeBig* in Constructor of > > >> j.l.String, > > >> > > > whereas Harmony does not support this alias at all. > > >> > > > > > >> > > > Do you have any concern about that? > > >> > > > -- > > >> > > > Tony Wu > > >> > > > China Software Development Lab, IBM > > >> > > > > > >> > > > > > >> --------------------------------------------------------------------- > > >> > > > Terms of use : http://incubator.apache.org/harmony/mailing.html > > >> > > > To unsubscribe, e-mail: > > >> [EMAIL PROTECTED] > > >> > > > For additional commands, e-mail: > > >> [EMAIL PROTECTED] > > >> > > > > > >> > > > > > >> > > > > >> > > > > >> > > -- > > >> > > Leo Li > > >> > > China Software Development Lab, IBM > > >> > > > > >> > > > > >> > > > >> > > > >> > -- > > >> > Best regards, > > >> > Andrew Zhang > > >> > > >> > > >> > > >> > > >> -- > > >> Best regards, > > >> Andrew Zhang > > >> > > >> > > > > > > > > > > > > -- > > Paulex Yang > > China Software Development Lab > > IBM > > > > > > --------------------------------------------------------------------- > > Terms of use : http://incubator.apache.org/harmony/mailing.html > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > -- > Tony Wu > China Software Development Lab, IBM > > --------------------------------------------------------------------- > Terms of use : http://incubator.apache.org/harmony/mailing.html > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Best regards, Andrew Zhang
-- Tony Wu China Software Development Lab, IBM --------------------------------------------------------------------- Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
