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RE: [udig-devel] Three coding questions
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Adrian, yes, I think it's confusing too.
Actually, my reading of the current geotools API is that FactoryFinder
is deprecated and we're meant to be using
org.geotools.factory.FactoryRegistry.
Anyway, a jiira was recently created for providing an implementation of
GeoAPI's CommonFactory interface,
http://jira.codehaus.org/browse/GEOT-828, this should simplify things a
lot,
col
> -----Original Message-----
> From: udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
> [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf
> Of Jody Garnett
> Sent: 27 March 2006 12:41
> To: User-friendly Desktop Internet GIS; GeoTools Devel List
> Subject: Re: [udig-devel] Three coding questions
>
> Adrian Custer wrote:
> > 3) uDig/Geotools: How do we use FactoryFinders?
> >
> > I'm kind of confused by all the Factories, FactoryBuilders and
> > FactoryFinders around. It seems there are several
> FactoryFinders which
> > means we have to find the Finders. Is there an explanation
> of what each
> > of them do? Is the idea eventually to have a single 'FactoryFinder'
> > instance that does really find all the factories for all
> the different
> > types of objects?
> >
> >
> This idea of a FactoryFinder is really really old (aka GOF era), the
> AWTToolkit amounts to a FactoryFinder.
> Modern people use a "container" and we are working on setting
> geotools
> up for that for the geotools 2.3.x release.
>
> To use a Factory Finder call its static methods and ask it to
> locate a
> factory for you. How does it find a factory?
> Based on the geotools plug-in system (basically what is in your
> classpath). For something like uDig that uses a
> plugin system that restricts classpath the answer gets hard really
> quickly and involves "buddy classloaders".
>
> For a more detailed account of what is going on in geotools, and why,
> try this article.
> -
> http://docs.codehaus.org/display/GEOTOOLS/Objects%2C+Interface
s+and+Factories
>
> Cheers,
> Jody
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
>
