Thanks a lot Jody, its working fine now with the entry in the META_INF/Services
On Mon, Jul 2, 2012 at 6:10 AM, Jody Garnett <jody.garn...@lisasoft.com>wrote: > You need to "register" the function in META_INF/servies as described in > the function tutorial. It will need to be loaded in the same classloader as > geotools for the gt-main module FunctionFinder to see it. > > There is a geotools FunctionFactory implementation that scans all the > functions defined in META_INF/services and provides them to the library > (including the renderer). > > You can also take a larger gulp and register your own complete > FunctionFactory implementation. > > For more details: > - http://docs.geotools.org/latest/userguide/tutorial/advanced/factory.html > - > http://docs.geotools.org/latest/userguide/tutorial/advanced/function.html > > Jody > > On 29/06/2012, at 10:39 PM, Trupti Pol 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 > > http://lists.refractions.net/mailman/listinfo/udig-devel > > _______________________________________________ > User-friendly Desktop Internet GIS (uDig) > http://udig.refractions.net > http://lists.refractions.net/mailman/listinfo/udig-devel >
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