package org.geotools.render;
import java.awt.Color;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.geotools.factory.CommonFactoryFinder;
import org.geotools.feature.NameImpl;
import org.geotools.metadata.iso.citation.OnLineResourceImpl;
import org.geotools.styling.AnchorPoint;
import org.geotools.styling.Displacement;
import org.geotools.styling.ExternalGraphic;
import org.geotools.styling.FeatureTypeConstraint;
import org.geotools.styling.FeatureTypeStyle;
import org.geotools.styling.Fill;
import org.geotools.styling.Font;
import org.geotools.styling.Graphic;
import org.geotools.styling.Mark;
import org.geotools.styling.PointPlacement;
import org.geotools.styling.PointSymbolizer;
import org.geotools.styling.PolygonSymbolizer;
import org.geotools.styling.Rule;
import org.geotools.styling.SLD;
import org.geotools.styling.Stroke;
import org.geotools.styling.Style;
import org.geotools.styling.StyleBuilder;
import org.geotools.styling.StyleFactory;
import org.geotools.styling.StyledLayerDescriptor;
import org.geotools.styling.Symbolizer;
import org.geotools.styling.TextSymbolizer;
import org.geotools.styling.UserLayer;
import org.opengis.filter.Filter;
import org.opengis.filter.FilterFactory;
import org.opengis.filter.FilterFactory2;
import org.opengis.filter.expression.Expression;
import org.opengis.style.GraphicalSymbol;
public class StyleExamples {
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(null);
FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2(null);
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
}
private void styleBuilderExample() throws Exception {
// styleBuilderExample start
//
// We are using the GeoTools StyleBuilder that is helpful for quickly making things
StyleBuilder builder = new StyleBuilder();
FilterFactory2 ff = builder.getFilterFactory();
// RULE 1
// first rule to draw cities
// define a point symbolizer representing a city
Graphic city = builder.createGraphic();
city.setSize(ff.literal(10));
city.graphicalSymbols().add(builder.createExternalGraphic("file:city.svg", "svg")); // svg
// preferred
city.graphicalSymbols().add(builder.createExternalGraphic("file:city.png", "png")); // png next
city.graphicalSymbols().add(
builder.createMark(StyleBuilder.MARK_CIRCLE, Color.BLUE, Color.BLACK, 1));
PointSymbolizer pointSymbolizer = builder.createPointSymbolizer(city, "the_geom");
Rule rule1 = builder.createRule(pointSymbolizer);
rule1.setName("rule1");
rule1.getDescription().setTitle("City");
rule1.getDescription().setAbstract("Rule for drawing cities");
rule1.setFilter(ff.less(ff.property("POPULATION"), ff.literal(50000)));
//
// RULE 2 Default
Graphic dotGraphic = builder.createGraphic(null, builder.createMark(StyleBuilder.MARK_CIRCLE),
null);
PointSymbolizer dotSymbolize = builder.createPointSymbolizer(dotGraphic);
Rule rule2 = builder.createRule(dotSymbolize);
rule2.setIsElseFilter(true);
//
// define feature type styles used to actually define how features are rendered
Rule rules[] = new Rule[] { rule1, rule2 };
FeatureTypeStyle featureTypeStyle = builder.createFeatureTypeStyle("Feature", rules);
//
// create a "user defined" style
Style style = builder.createStyle();
style.setName("style");
style.getDescription().setTitle("User Style");
style.getDescription().setAbstract("Definition of Style");
style.featureTypeStyles().add(featureTypeStyle);
// styleBuilderExample end
}
private void splatExample() {
// splatExample start
StyleBuilder builder = new StyleBuilder();
FilterFactory2 ff = builder.getFilterFactory();
Graphic splat = builder.createGraphic(null, builder.createMark("splat"), null);
PointSymbolizer symbolizer = builder.createPointSymbolizer(splat);
// builder will fill in all the other classes with defaults
Style style = builder.createStyle(symbolizer);
// splatExample end
}
private void sldExample() {
// sldExample start
StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory(null);
StyledLayerDescriptor sld = styleFactory.createStyledLayerDescriptor();
sld.setName("example");
sld.setAbstract("Example Style Layer Descriptor");
UserLayer layer = styleFactory.createUserLayer();
layer.setName("layer");
FeatureTypeConstraint constraint = styleFactory.createFeatureTypeConstraint("Feature",
Filter.INCLUDE, null);
layer.layerFeatureConstraints().add(constraint);
Style style = styleFactory.createStyle();
style.getDescription().setTitle("Style");
style.getDescription().setAbstract("Definition of Style");
// define feature type styles used to actually
// define how features are rendered
//
layer.userStyles().add(style);
sld.layers().add(layer);
// sldExample end
}
private void featureTypeStyleExample() {
// featureTypeStyleExample start
StyleBuilder styleBuilder = new StyleBuilder();
Style style = styleBuilder.createStyle();
PointSymbolizer pointSymbolizer = styleBuilder.createPointSymbolizer();
Graphic graphic = styleBuilder.createGraphic();
ExternalGraphic external = styleBuilder.createExternalGraphic("file:///C:/images/house.gif",
"image/gif");
graphic.graphicalSymbols().add(external);
graphic.graphicalSymbols().add(styleBuilder.createMark("circle"));
pointSymbolizer.setGraphic(graphic);
Rule rule = styleBuilder.createRule(pointSymbolizer);
FeatureTypeStyle featureTypeStyle = styleBuilder.createFeatureTypeStyle("Feature", rule);
style.featureTypeStyles().add(featureTypeStyle);
// featureTypeStyleExample end
}
private void twoFeatureTypeStyles() {
// twoFeatureTypeStyles start
StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory(null);
FilterFactory2 filterFactory = CommonFactoryFinder.getFilterFactory2(null);
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
}
private void quickPointSymbolizer() {
// quickPointSymbolizer start
// "testPoint" feature type style
StyleBuilder sb = new StyleBuilder();
FilterFactory2 ff = sb.getFilterFactory();
Mark testMark = sb.createMark(sb.attributeExpression("name"), sb.createFill(Color.RED, 0.5),
null);
Graphic graph = sb.createGraphic(null, // An external graphics if needed
new Mark[] { testMark }, // a Mark if not an external graphics
null, // aSymbol
ff.literal(1), // opacity
ff.property("size"), // read from feature "size" attribute
ff.property("rotation")); // rotation, here read into the feature
PointSymbolizer aPointSymbolizer = sb.createPointSymbolizer(graph);
// creation of the style
Style style = sb.createStyle(aPointSymbolizer);
// quickPointSymbolizer end
}
private void quickTextSymbolizer() {
// quickTextSymbolizer start
// "labelPoint" feature type style
StyleBuilder sb = new StyleBuilder();
FilterFactory2 ff = sb.getFilterFactory();
// creation of the TextSymbolizer
AnchorPoint anchorPoint = sb.createAnchorPoint(sb.attributeExpression("X"),
sb.attributeExpression("Y"));
PointPlacement pointPlacement = sb.createPointPlacement(anchorPoint, null,
sb.literalExpression(0));
TextSymbolizer textSymbolizer = sb.createTextSymbolizer(sb.createFill(Color.BLACK), new Font[] {
sb.createFont("Lucida Sans", 10), sb.createFont("Arial", 10) }, sb.createHalo(),
sb.attributeExpression("name"), pointPlacement, null);
// creation of the Point symbolizer
Mark circle = sb.createMark(StyleBuilder.MARK_CIRCLE, Color.RED);
Graphic graph2 = sb.createGraphic(null, circle, null, 1, 4, 0);
PointSymbolizer pointSymbolizer = sb.createPointSymbolizer(graph2);
// creation of the style
Style style = sb.createStyle();
FeatureTypeStyle featureTypeStyle = sb.createFeatureTypeStyle("labelPoint", new Symbolizer[] {
textSymbolizer, pointSymbolizer });
style.featureTypeStyles().add(featureTypeStyle);
// creation of the style
// quickTextSymbolizer end
}
private void quickPolygonSymbolizer() {
// quickPolygonSymbolizer start
StyleBuilder styleBuilder = new StyleBuilder();
FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2(null);
PolygonSymbolizer polygonSymbolizer = styleBuilder.createPolygonSymbolizer(Color.BLUE);
polygonSymbolizer.getFill().setOpacity(ff.literal(0.5)); // 50% blue
polygonSymbolizer.setStroke(styleBuilder.createStroke(Color.BLACK, 2.0));
// will create a default feature type style and rule etc...
Style style = styleBuilder.createStyle(polygonSymbolizer);
// quickPolygonSymbolizer end
}
private void parseSLD() throws Exception {
// parseSLD start
// create the parser with the sld configuration
org.geotools.xml.Configuration configuration = new org.geotools.sld.SLDConfiguration();
org.geotools.xml.Parser parser = new org.geotools.xml.Parser(configuration);
// the xml instance document above
InputStream xml = new FileInputStream("markTest.sld");
// parse
StyledLayerDescriptor sld = (StyledLayerDescriptor) parser.parse(xml);
// parseSLD end
}
private void markTestSLD() {
// markTestSLD start
StyleBuilder sb = new StyleBuilder();
FilterFactory ff = sb.getFilterFactory();
Style style = sb.createStyle();
style.setName("MyStyle");
// "testPoint" feature type style
Mark testMark = sb.createMark(sb.attributeExpression("name"), sb.createFill(Color.RED, 0.5),
null);
Graphic graph = sb.createGraphic(null, new Mark[] { testMark }, null, sb.literalExpression(1),
sb.attributeExpression("size"), sb.attributeExpression("rotation"));
style.featureTypeStyles().add(
sb.createFeatureTypeStyle("testPoint", sb.createPointSymbolizer(graph)));
// "labelPoint" feature type style
AnchorPoint anchorPoint = sb.createAnchorPoint(sb.attributeExpression("X"),
sb.attributeExpression("Y"));
PointPlacement pointPlacement = sb.createPointPlacement(anchorPoint, null,
sb.literalExpression(0));
TextSymbolizer textSymbolizer = sb.createTextSymbolizer(sb.createFill(Color.BLACK), new Font[] {
sb.createFont("Lucida Sans", 10), sb.createFont("Arial", 10) }, sb.createHalo(),
sb.attributeExpression("name"), pointPlacement, null);
Mark circle = sb.createMark(StyleBuilder.MARK_CIRCLE, Color.RED);
Graphic graph2 = sb.createGraphic(null, circle, null, 1, 4, 0);
PointSymbolizer pointSymbolizer = sb.createPointSymbolizer(graph2);
style.featureTypeStyles().add(
sb.createFeatureTypeStyle("labelPoint", new Symbolizer[] { textSymbolizer,
pointSymbolizer }));
// markTestSLD end
}
}