Hi Hiranya,
Hiranya Jayathilaka <[email protected]> wrote on 05/06/2009 08:16:52 AM:
> Hi Michael,
>
> Just a little idea that came to mind (I'm not sure whether even if
> it is possible). Can we branch out from the trunk and maintain a
> Java5 version of Xerces in a different branch? We can do Xerces
> releases for Java 5, based on the branch and when the community is
> ready to migrate to Java 5 all we have to do is merge the branch to
> the trunk. Until we do that people who are already on Java 5 can use
> our Java5 version of Xerces.
>
> It is probably more work to us. But I think given the benefits of
> moving to Java 5, I think it's worth it. WDYT?
How much work it might be would somewhat depend on the kind of changes that
are being made on the branch. For example, mechanical changes like
StringBuffer -> StringBuilder, new Integer() -> Integer.valueOf() would
help improve performance and should be fairly easy to maintain. Others like
usage of generics, for each loops, varargs and other Java 5 syntactic sugar
in the internals really only benefits Xerces developers (i.e. us) except
that it might make it much harder to apply patches between branches.
Keeping the trunk and the xml-schema-1.1-dev branches in synch hasn't been
too bad, so perhaps maintaining one for Java 5 might not have quite that
much more overhead.
Alternatively we could create classes that are smart enough to use Java 5
capability if its available. For example:
public abstract class Util {
public static Util getUtil() {
// returns Util_13 or Util_15 depending on the JDK level
}
public abstract Integer valueOf(int i);
}
public class Util_13 extends Util {
public Integer valueOf(int i) {
return new Integer(i);
}
}
public class Util_15 extends Util {
public Integer valueOf(int i) {
return new Integer.valueOf(i);
}
}
which would work for users on earlier JDKs but do better things on Java 5
and above. Then I think the Java 1.3 and 5 versions could co-exist on the
trunk and we could have one unified release including both. Hopefully less
work for us and users get the benefit of Java 5 improvements.
We did something similar early on (i.e. SecuritySupport vs.
SecuritySupport12) when we were still supporting JDK 1.1 to take advantage
of Java 1.2's security framework.
> Thanks,
> Hiranya
> On Wed, May 6, 2009 at 5:21 PM, Michael Glavassevich <[email protected]
> > wrote:
> Hi Hiranya,
>
> The discussion branched out on to several mailing lists [1]. Plus I
> got a few private e-mails. There are still users and projects which
> depend on Xerces that are still stuck on earlier JDKs (including 1.
> 3) so we only voted to drop support for Java 1.2 right now. So based
> on that feedback (from November of last year) I think it's still too
> early for us to make the move to Java 5. Perhaps we can ask the
> question to the community again after we've had a release or two
> with Java 1.3 being the minimum.
>
> Thanks.
>
> [1] http://markmail.org/search/?q=%22Dropping%20JDK%201.2%20support%
> 20for%20Xerces-J%22#query:%22Dropping%20JDK%201.2%20support%20for%
> 20Xerces-J%22%20order%3Adate-backward+page:1+state:facets
>
> Michael Glavassevich
> XML Parser Development
> IBM Toronto Lab
> E-mail: [email protected]
> E-mail: [email protected]
>
> Hiranya Jayathilaka <[email protected]> wrote on 05/06/2009 05:56:54
AM:
>
>
> > Hi Folks,
> >
> > I would like to know the team's view on migrating to Java 5. I
> > remember this subject being discussed in the mailing list a several
> > months back and we did receive some encouraging comments from the
> > communit too [1]. But the things have gone pretty quiet ever since.
> >
> > Thanks,
> > --
> > Hiranya Jayathilaka
> > E-mail: [email protected]; Mobile: +94 77 633 3491
> > Blog: http://techfeast-hiranya.blogspot.com
> >
> > [1] - http://xerces-j-dev.markmail.org/message/2lw4gnijzmno5e4l
>
> --
> Hiranya Jayathilaka
> E-mail: [email protected]; Mobile: +94 77 633 3491
> Blog: http://techfeast-hiranya.blogspot.com
Thanks.
Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: [email protected]
E-mail: [email protected]
