[Gvsig_english] groovy

[Robert Sanson]

Hi Jorge
 
I am new to gvSIG, and am wanting to work out the best way to write
extensions for gvSIG. For instance, I want to be able to select an
attribute value from a layer in the view based on a click location, and
use that to execute a SQL statement against a database. I have been
looking at options such as Jython and Groovy. Perhaps it is better to
stick to Java? Has the developer's manual been translated to English
yet? I tried to follow the link to the News item on the gvSIG web site,
but did not find the manual:
 
https://gvsig.org/web/docdev/manual-for-developers-gvSIG 
 
Many thanks,
 
Robert Sanson

>>> "Jorge Sanz" <jsanz at prodevelop.es> 28/08/2008 7:11 p.m. >>>

Hi Robert,
Do you want to execute groovy compiled classes or to execute dynamic
compiled scripts?
I*ve tested recently the dynamic execution of groovy scripts in gvSIG
(sorry but I haven*t any examples here at work) loading the script
files. I created a new extension (like any other gvSIG plugin) with its
config.xml and so on. In my extension execute method I*ve tried to parse
a groovy script[1].
One thing you should care about is to pass the extension classloader[2]
to the compiler in order to let your groovy scripts to access gvSIG
classes. I*ve successfully accessed andami classes (like PluginServices
for example) but I*ve experienced casting problems with other libraries
like FMap (to access for example to the active view*s MapControl).
Anyway (IMHO) developing extensions for gvSIG is easier in Java than in
scripting languages.
Regards
[1]http://groovy.codehaus.org/api/groovy/lang/GroovyShell.html#GroovyShell(java.lang.ClassLoader)
[2]
http://groovy.codehaus.org/api/groovy/lang/GroovyShell.html#evaluate(java.io.File)

--
Jorge Gaspar Sanz Salinas
Ingeniero en Geodesia y Cartografía
Prodevelop S.L. - Valencia - España
Tlf.:  96.351.06.12 - Fax:   96.351.09.68 
jsanz[en]prodevelop[punto]es
http://www.prodevelop.es 


De:gvsig_internacional-bounces at runas.cap.gva.es
[mailto:gvsig_internacional-bounces at runas.cap.gva.es] En nombre de
Robert Sanson
Enviado el: jueves, 28 de agosto de 2008 6:16
Para: Users and Developers mailing list
Asunto: Re: [Gvsig_english] groovy


Hi 


How can I use groovy scripting in gvSIG?


Many thanks,


Robert Sanson




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