Hi,
I need to display in a map some features with their color according to the
value of their ID. I 've tried defining the following SLD for a line layer:
<LineSymbolizer>
<Stroke>
<CssParameter name="stroke">
<ogc:PropertyName>ID</ogc:PropertyName>
</CssParameter>
<CssParameter name="stroke-width">
<ogc:Literal>2</ogc:Literal>
</CssParameter>
</Stroke>
</LineSymbolizer>
That solution is not working for me depending on the datasource ID type. To
solve that, I changed the class org.geotools.util.ColorConverterFactory
adding an extra "if" that handles the Long data Type. The code is the
following.
// long to color
if ( source.equals( Long.class ) ) {
return new Converter() {
public Object convert(Object source, Class target)
throws Exception {
Integer rgba = new
Integer((int)((Long)source).longValue());
int alpha = 0xff000000 & rgba;
return new Color(rgba, alpha != 0 );
}
};
}
That solution works for me, but I am wondering if there is a better
alternative for that, just to avoid modifying the code on every geoTools
version update, or if that solution could be part of a future release for
geoTools.
Thanks in advance. Xevi
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