private void twoFeatureTypeStyles() {
// twoFeatureTypeStyles start
StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory();
FilterFactory2 filterFactory = CommonFactoryFinder.getFilterFactory2();
Style style = styleFactory.getDefaultStyle();
// Feature type style 1
FeatureTypeStyle fts = styleFactory.createFeatureTypeStyle();
fts.featureTypeNames().add(new NameImpl("feature-type-1"));
style.featureTypeStyles().add(fts);
// Feature type style 2
FeatureTypeStyle fts2 = styleFactory.createFeatureTypeStyle();
fts2.featureTypeNames().add(new NameImpl("feature-type-2"));
// creating the rule 1
Rule rule1 = styleFactory.createRule();
rule1.setName("rule1");
Filter aFilter = filterFactory.id(Collections.singleton(filterFactory.featureId("FID")));
rule1.setFilter(aFilter);
fts2.rules().add(rule1);
// creating the rule 2
Rule rule2 = styleFactory.createRule();
rule2.setIsElseFilter(true);
rule2.setName("rule2");
fts2.rules().add(rule2);
style.featureTypeStyles().add(fts2);
// twoFeatureTypeStyles end
}
/** Create a default Style for feature display */
private Style createDefaultStyle() {
Rule rule = createRule(LINE_COLOUR, FILL_COLOUR);
FeatureTypeStyle fts = sf.createFeatureTypeStyle();
fts.rules().add(rule);
Style style = sf.createStyle();
style.featureTypeStyles().add(fts);
return style;
}
/**
* Create a Style where features with given IDs are painted yellow, while others are painted with
* the default colors.
*/
private Style createSelectedStyle(Set<FeatureId> IDs) {
Rule selectedRule = createRule(SELECTED_COLOUR, SELECTED_COLOUR);
selectedRule.setFilter(ff.id(IDs));
Rule otherRule = createRule(LINE_COLOUR, FILL_COLOUR);
otherRule.setElseFilter(true);
FeatureTypeStyle fts = sf.createFeatureTypeStyle();
fts.rules().add(selectedRule);
fts.rules().add(otherRule);
Style style = sf.createStyle();
style.featureTypeStyles().add(fts);
return style;
}
private Style createDefaultStyle(int idx, Set<FeatureId> IDs) {
Color fillColor = featureFills[idx];
Rule selectedRule = createRule(SELECTED_COLOUR, SELECTED_COLOUR, true);
selectedRule.setFilter(ff.id(IDs));
Rule rule = createRule(fillColor, fillColor, false);
rule.setElseFilter(true);
FeatureTypeStyle fts = sf.createFeatureTypeStyle();
fts.rules().add(selectedRule);
fts.rules().add(rule);
Style style = sf.createStyle();
style.featureTypeStyles().add(fts);
return style;
}
static Style makeStyle(StyleFactory factory, List<List<MiniRule>> ftStyles) {
Style style = factory.createStyle();
for (List<MiniRule> rules : ftStyles) {
FeatureTypeStyle ftStyle = factory.createFeatureTypeStyle();
for (MiniRule miniRule : rules) {
if (!miniRule.symbolizers.isEmpty()) {
Rule realRule = factory.createRule();
for (Symbolizer sym : miniRule.symbolizers) {
realRule.symbolizers().add(sym);
}
ftStyle.rules().add(realRule);
}
}
style.featureTypeStyles().add(ftStyle);
}
return style;
}
/**
* Creates a FeatureTypeStyle (core part of a SLD file). It is composed by Rules (tag <sld:Rule>)
* and each Rule can contain one Filter (filters values) and one Symbolizer (what's displayed). It
* Needs 2 factories: <br>
* - I_FilterFactory: gives Filters (tag <ogc:Filter>) <br>
* - I_SymbolizerFactory: gives Symbolizers (tag: <sld:PolygonSymbolizer> or
* <sld:PointSymbolizer>) <br>
*
* @param filterFact Filters Factory
* @param symbolizerFact Symbolizers Factory
* @return FeatureTypeStyle (List of Rules)
*/
private FeatureTypeStyle createFeatureTypeStyle(
I_FilterFactory filterFact, I_SymbolizerFactory symbolizerFact) {
StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory(null);
FeatureTypeStyle fts = styleFactory.createFeatureTypeStyle();
Iterator<Symbolizer> symbolizers = symbolizerFact.iterator();
Iterator<Filter> filters = filterFact.iterator();
// use each factory iterator to get their items (Filter and Symbolizer)
// there should be as many symbolizers as many filters
while (symbolizers.hasNext() && filters.hasNext()) {
// create a Rule. A Rule is composed by one Filter and one Symbolizer
Rule rule = styleFactory.createRule();
Filter filter = filters.next();
rule.setSymbolizers(new Symbolizer[] {symbolizers.next()});
rule.setFilter(filter.getGISFilter());
rule.setName(filter.getName());
rule.setTitle(filter.getName());
fts.addRule(rule);
}
if (filters.hasNext()) {
throw new RuntimeException("BUG: more filters than symbolizers");
}
/*
* This piece of code can be added to add a stroke around the polygons.
* This rule does not include a filter, therefore, it is globally applied.
*/
/*
StyleBuilder styleBuilder = new StyleBuilder();
Rule rule = styleFactory.createRule();
Stroke stroke = styleFactory.createStroke(
styleBuilder.literalExpression(Color.BLACK), // color
styleBuilder.literalExpression(1), // width
styleBuilder.literalExpression(1.0)); // opacity
LineSymbolizer ls = styleFactory.createLineSymbolizer(stroke, "");
rule.setSymbolizers(new Symbolizer[] {ls});
fts.addRule(rule);
*/
return fts;
}
private void styleFactoryExample() throws Exception {
// styleFactoryExample start
//
// We are using the GeoTools styleFactory that allows access to get/set methods
org.geotools.styling.StyleFactory sf = CommonFactoryFinder.getStyleFactory();
FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2();
StyledLayerDescriptor sld = sf.createStyledLayerDescriptor();
sld.setName("sld");
sld.setTitle("Example");
sld.setAbstract("Example Style Layer Descriptor");
UserLayer layer = sf.createUserLayer();
layer.setName("layer");
//
// define constraint limited what features the sld applies to
FeatureTypeConstraint constraint =
sf.createFeatureTypeConstraint("Feature", Filter.INCLUDE, null);
layer.layerFeatureConstraints().add(constraint);
//
// create a "user defined" style
Style style = sf.createStyle();
style.setName("style");
style.getDescription().setTitle("User Style");
style.getDescription().setAbstract("Definition of Style");
//
// define feature type styles used to actually define how features are rendered
FeatureTypeStyle featureTypeStyle = sf.createFeatureTypeStyle();
// RULE 1
// first rule to draw cities
Rule rule1 = sf.createRule();
rule1.setName("rule1");
rule1.getDescription().setTitle("City");
rule1.getDescription().setAbstract("Rule for drawing cities");
rule1.setFilter(ff.less(ff.property("POPULATION"), ff.literal(50000)));
//
// create the graphical mark used to represent a city
Stroke stroke = sf.stroke(ff.literal("#000000"), null, null, null, null, null, null);
Fill fill = sf.fill(null, ff.literal(Color.BLUE), ff.literal(1.0));
// OnLineResource implemented by gt-metadata - so no factory!
OnLineResourceImpl svg = new OnLineResourceImpl(new URI("file:city.svg"));
svg.freeze(); // freeze to prevent modification at runtime
OnLineResourceImpl png = new OnLineResourceImpl(new URI("file:city.png"));
png.freeze(); // freeze to prevent modification at runtime
//
// List of symbols is considered in order with the rendering engine choosing
// the first one it can handle. Allowing for svg, png, mark order
List<GraphicalSymbol> symbols = new ArrayList<GraphicalSymbol>();
symbols.add(sf.externalGraphic(svg, "svg", null)); // svg preferred
symbols.add(sf.externalGraphic(png, "png", null)); // png preferred
symbols.add(sf.mark(ff.literal("circle"), fill, stroke)); // simple circle backup plan
Expression opacity = null; // use default
Expression size = ff.literal(10);
Expression rotation = null; // use default
AnchorPoint anchor = null; // use default
Displacement displacement = null; // use default
// define a point symbolizer of a small circle
Graphic city = sf.graphic(symbols, opacity, size, rotation, anchor, displacement);
PointSymbolizer pointSymbolizer =
sf.pointSymbolizer("point", ff.property("the_geom"), null, null, city);
rule1.symbolizers().add(pointSymbolizer);
featureTypeStyle.rules().add(rule1);
//
// RULE 2 Default
List<GraphicalSymbol> dotSymbols = new ArrayList<GraphicalSymbol>();
dotSymbols.add(sf.mark(ff.literal("circle"), null, null));
Graphic dotGraphic = sf.graphic(dotSymbols, null, ff.literal(3), null, null, null);
PointSymbolizer dotSymbolizer = sf.pointSymbolizer("dot", null, null, null, dotGraphic);
List<org.opengis.style.Symbolizer> symbolizers = new ArrayList<org.opengis.style.Symbolizer>();
symbolizers.add(dotSymbolizer);
Filter other = null; // null will mark this rule as "other" accepting all remaining features
Rule rule2 =
sf.rule("default", null, null, Double.MIN_VALUE, Double.MAX_VALUE, symbolizers, other);
featureTypeStyle.rules().add(rule2);
style.featureTypeStyles().add(featureTypeStyle);
layer.userStyles().add(style);
sld.layers().add(layer);
// styleFactoryExample end
}
