On 10/17/06, Tony Wu <[EMAIL PROTECTED]> 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.
exactly!
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.
I think we have no choice because spec has explictly pointed out the basic
charset name for java.io,java.lang and nio, which includes "UnicodeBig". So
the problem left is how, not whether. :-)
Mapping may solve this problem. We may map:
1. io/lang -> nio
2. nio -> io/lang
3. io/lang/nio -> icu
BTW, does current nio.charset implementation support "UnicodeBig"? There're
a little differences between "UnicodeBig" and "UTF-16 BE":
UnicodeBig: Sixteen-bit Unicode Transformation Format, big-endian byte
order, with byte-order mark
UTF-16 BE: Sixteen-bit Unicode Transformation Format, big-endian byte order
[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
> > > >
> > > >
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> > > > Terms of use : http://incubator.apache.org/harmony/mailing.html
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> > > >
> > > >
> > >
> > >
> > > --
> > > Leo Li
> > > China Software Development Lab, IBM
> > >
> > >
> >
> >
> > --
> > Best regards,
> > Andrew Zhang
>
>
>
>
> --
> Best regards,
> Andrew Zhang
>
>
--
Tony Wu
China Software Development Lab, IBM
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Best regards,
Andrew Zhang
