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From "Alexey Petrenko" <alexey.a.petre...@gmail.com>
Subject Re: [classlib] internationalization
Date Wed, 12 Jul 2006 07:45:37 GMT
Geir,

I've reread your email in the morning :)

Internationalization classes auto-generation is really good idea. We
can apply it for method described here and for "new Eclipse" method.

In the first case "generator" will insert correct resource bundle and
package name. In the second one we can generate the supporting class
from the resource bundle file.

There will be 2 big differences between this two methods:
1. Initialization time: much faster for the "first" method
2. Run time access time: much faster for the "second" method

So if we will have situation with the big resource file and small
number of accesses to it then the "first" method will be faster. In
the case with large number of accesses the "second" method will be
more preferable.

Probably we should think about using both methods depends on the purpose.

For example. For UI application we have a huge number of messages
which are widely used during normal run (menu items, user messages
etc) and in this case the "second" method seems better.
Otherwise for the code without user interaction the messages from the
bundle will be mostly used as error messages for the throwing
exceptions. We hope that exceptions will not happen very often. And we
know that throwing an exception is rather long operation. So in this
case the "first" method seems better.

Hmm... It looks like I've found an argument for using traditional
method in class library :)

SY, Alexey

2006/7/11, Geir Magnusson Jr <geir@pobox.com>:
>
>
> Tim Ellison wrote:
> > Ilya Okomin wrote:
> >> I'd like to be a volunteer for that.
> >
> > I just started working in this area (for SQL), maybe that is what
> > prompted you...<g>
> >
> >> IMHO it's reasonable to use framework presented in luni module with some
> >> modifications.
> >> To avoid duplication of Msg class I'd suggest use slightly modified Msg
> >> class named let say
> >> o.a.h.luni.utils.ExtMsg.
> >> ExtMsg has the same methods as Msg, the difference is only these methods
> >> are
> >> non static,
> >> also specific external messages resource bundle will be initialized by name
> >> in the constructor.
> >> Each module will have class o.a.h.<module>.MsgUtils with static field
'msg'
> >> that is the instance of ExtMsg
> >> initialized with the name of the external messages resource bundle related
> >> to this module.
> >> Thus external message for e.g. security module could be obtained using next
> >> call:
> >>
> >> "org.apache.harmony.security.internal.MsgUtils.msg.getString("security.1");"
> >
> > I see your point, and considered doing it that way too.  I'm not overly
> > concerned about the duplication, they are trivial helper methods anyway,
> > and we all know that singletons are evil ;-)
>
> I don't understand this, given you have one...
>
> >
> >> And at last, place to keep resources with external messages I suppose to be
> >> o.a.h.<module>.internal.
> >
> > I went for o.a.h.<module>.internal.nls just to keep them tidy.
> >
> >> If all these thoughts sounds reasonable, I'd like to implement framework
> >> mentioned above and send you a patch.
> >
> > The real work is going through and externalizing all the messages, and
> > if I were to be really ambitious to add messages to all the exceptions
> > that we throw that don't have anything right now.
> >
> > Patches are always welcome.  We can work on that that as we finalize on
> > the framework.
>
> Have you had any thoughts about a 'common' code set, that is copied and
> modified at build time, setting the right package name and bundle name
> by convention?  That would remove the need to duplicate the code.
>
> geir
>
>
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>


-- 
Alexey A. Petrenko
Intel Middleware Products Division

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