On 16 February 2012 16:10, Rakshit Majithiya <[email protected]> wrote:
> so, I found the StyleFunctionLab for 2.6.3 very useful guide.
> Can I implement the same functionality in 8.0 ??
>

Yes you certainly could but it would require a little bit of work...

- Make ColorLookupFunction into a separate (ie. non-nested) class.

- Modify the class so that it takes the feature collection and
expression as parameters rather than as args to the constructor.

- Register it with GeoTools by putting its fully qualified name in the file:
  META-INF/services/org.opengis.filter.expression.Function
(If you are using Maven, the META-INF should be placed in src/main/resources)

Then in your own code you will be able to access the function via the
FilterFactory2.function method.

I don't have time to show you how to modify the class etc right now
but if you look at this tutorial on functions it might help:

http://docs.geotools.org/latest/userguide/tutorial/advanced/function.html

Note that in the tutorial you create your own FunctionFactory as well
as the custom Function class. In your case I don't think this is
necessary.

Sorry for the rushed reply. If I have more time in the next few days
I'll post some example code but hopefully you'll beat me to it :)

Michael

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