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Re: [udig-devel] Unable to find custom function "Colourmap"
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use geotools 8 and try it
On 29 June 2012 18:09, Trupti Pol <ktrup7@xxxxxxxxx> wrote:
> Hi,
>
> I am trying to develope a custom function "ColorMap" which can be used in
> SLD to get the different style based on feature attributes.
>
> This function is mainly utilized to provide different draw color to each
> feature based on the "ColorIndex" attribute.
>
> My Sample function is as follows
>
> public class ColorMapFunction extends FunctionExpressionImpl{
>
> public ColorMapFunction(String name) {
> super("ColorMap");
> }
>
> @Override
> public int getArgCount() {
> return 1;
> }
>
> public Object evaluate(Object feature) {
> String colorIndex;
>
>
> try {
> colorIndex = getExpression(0).evaluate(feature).toString();
> } catch (Exception e){ // probably a type error
> throw new IllegalArgumentException(
> "Filter Function problem for function ColorMap
> argument #0 - expected type String");
> }
>
> return getColor(colorIndex);
> }
>
> private String getColor(String colorTablePath, String colorIndex){
> // will provide different color based on colorIndex
> }
> }
>
> But when i try to use this function in my .sld file it gives me error as
> below
>
> Unable to find function Colourmap
>> java.lang.RuntimeException: Unable to find function Colourmap
>> at
>> org.geotools.filter.FunctionFinder.findFunction(FunctionFinder.java:103)
>> at
>> org.geotools.filter.FunctionFinder.findFunction(FunctionFinder.java:69)
>> at
>> org.geotools.filter.FilterFactoryImpl.function(FilterFactoryImpl.java:469)
>
>
> Please let me know am i skipping something here..I am using geotools 2.6 M2
> version
>
> --
> View this message in context: http://gis.19327.n5.nabble.com/Unable-to-find-custom-function-Colourmap-tp5714582.html
> Sent from the uDig Developer mailing list archive at Nabble.com.
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
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--
Regards,
B Kranthi Kumar,
Project Engineer,
C-DAC (R & D)-Pune-411007.
