date.compareTo() method doesn't work

[pipo]

it seems the method Date.compareTo(Date myDate) does not work with the
compiled version on GWT client side code but work perfectly in Web
Hosted mode.
Is it normal or is it a bug?

Instead of compareTo() I compare two dates using getTime() method.

[Thomas Broyer]

On 25 août, 16:52, pipo <marchais.nico...@gmail.com> wrote:
> it seems the method Date.compareTo(Date myDate) does not work with the
> compiled version on GWT client side code but work perfectly in Web
> Hosted mode.

That's because hosted mode uses the pure-Java Date while web mode
("compiled version") uses a JavaScript emulation.

> Is it normal or is it a bug?

It isn't normal, but compareTo looks fine:
http://code.google.com/p/google-web-toolkit/source/browse/releases/1.7/user/super/com/google/gwt/emul/java/util/Date.java#132
...and further mode it is unit-tested:
http://code.google.com/p/google-web-toolkit/source/browse/releases/1.7/user/test/com/google/gwt/emultest/java/util/DateTest.java#123

[marcotrev]

Hi all,

I'm experiencing the same issue using GWT 1.7. Browsers tested:
Firefox 3.5.3 (Mac OSX), Safari 4 (Mac OSX), Firefox 3.0 (Linux).

I haven't tested the java.util.Date.compareTo(Date) output directly, I
simply found that the result of Collections.sort(List<MyBean>,
Comparator<MyBean>) is not correct if the comparator delegates the
return value to Date.compareTo(Date).

The result becomes correct if I replace the Date.compareTo(Date)
statement with a logically equivalent code snippet which uses
Date.getTime().

Regards,

Marco

On 25 Ago, 22:32, Thomas Broyer <t.bro...@gmail.com> wrote:
> On 25 août, 16:52, pipo <marchais.nico...@gmail.com> wrote:
>
> > it seems the method Date.compareTo(Date myDate) does not work with the
> > compiled version on GWT client side code but work perfectly in Web
> > Hosted mode.
>
> That's because hosted mode uses the pure-Java Date while web mode
> ("compiled version") uses a JavaScript emulation.
>
> > Is it normal or is it a bug?
>

> It isn't normal, but compareTo looks fine:http://code.google.com/p/google-web-toolkit/source/browse/releases/1....
> ...and further mode it is unit-tested:http://code.google.com/p/google-web-toolkit/source/browse/releases/1....

[Sunshine Rain]

Any word on this? I just verified that Date.compareTo() does not work
properly on Firefox,
Safari and Chrome on a Mac, but does work in hosted mode. I used a
TreeSet.

[tskaife]

I had the same problem, as well, I think it had something to do with
where I got the date object from for me (if I create 2 new date
objects on the front end it would work fine, but if I got one of them
from the database then I would have issues). I just ended up doing a
getTime() on both of my date objects to compare them so instead of...

date1.compareTo(date2)

I would do

date1.getTime() - date2.getTime()

I think I have them in the right order...