Manuele Ventoruzzo ha scritto:
> Hi all,
>
> I have found a problem using Mark symbols that have to be evaluated
> through attribute expressions.
>
> Suppose that I want to show different symbols in a set of points and
> that mark well known name is stored in an attribute named "symbol".
>
> This is resulting java code:
>
> Mark theMark = sb.createMark(sb.attributeExpression("symbol"),
> sb.createFill(Color.RED, 0.5), null);
> Graphic graph = sb.createGraphic(null,new Mark[] {theMark},null,
>
> sb.literalExpression(1),sb.attributeExpression("size"),sb.attributeExpression("rotation"));
> PointSymbolizer aPointSymbolizer = sb.createPointSymbolizer(graph);
>
> So, everything works only and only if I use a label that evaluates
> "symbol" attribute.
> Otherwise, Geotools doesn't keep attribute value in the subset used
> during map rendering phase.
What happens when you use a mark? Exceptions? You don't see anything?
What renderer are you using?
In StreamingRenderer the expression above is turned into a java2d shape
by the following code:
Shape shape =
Java2DMark.getWellKnownMark(mark.getWellKnownName().getValue(feature)
.toString());
which should work just fine.
Cheers
Andrea
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