@SuppressWarnings("unchecked") private static Style createStyle(SimpleFeatureSource source, String fieldName) throws Exception { StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory(); FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2(); Function colourFn = ff.function("colorlookup", ff.literal(source), ff.property(fieldName)); Stroke stroke = styleFactory.createStroke( colourFn, ff.literal(1.0f), // line // width ff.literal(1.0f)); // opacity Fill fill = styleFactory.createFill(colourFn, ff.literal(1.0f)); // opacity Class<?> geomClass = source.getSchema().getGeometryDescriptor().getType().getBinding(); Symbolizer sym = null; Geometries geomType = Geometries.getForBinding((Class<? extends Geometry>) geomClass); switch (geomType) { case POLYGON: case MULTIPOLYGON: sym = styleFactory.createPolygonSymbolizer(stroke, fill, null); break; case LINESTRING: case MULTILINESTRING: sym = styleFactory.createLineSymbolizer(stroke, null); break; case POINT: case MULTIPOINT: Graphic gr = styleFactory.createDefaultGraphic(); gr.graphicalSymbols().clear(); Mark mark = styleFactory.getCircleMark(); mark.setFill(fill); mark.setStroke(stroke); gr.graphicalSymbols().add(mark); gr.setSize(ff.literal(10.0f)); sym = styleFactory.createPointSymbolizer(gr, null); break; default: throw new IllegalArgumentException("Unsupported geometry type"); } Style style = SLD.wrapSymbolizers(sym); return style; }