Cartographic CSS Plugin

The gt-css module is a plugin used used to generate Style objects from a human readable CSS representation.

To use this module in your application:

Related Links:

• CSS (GeoServer User Guide)

• CSS Cookbook (GeoServer User Guide)

Maven:

<dependency>
  <groupId>org.geotools</groupId>
  <artifactId>gt-css</artifactId>
  <version>${geotools.version}</version>
</dependency>

Cartographic CSS parser

Here is an example Cartographic CSS style definition from the CSS Cookbook:

* {
   mark: symbol(circle);
   mark-size: 6px;
 }

 :mark {
   fill: red;
 }

The following code can be used to parse the above file and generate a GeoTools Style object:

Stylesheet ss = CssParser.parse(css);
CssTranslator translator = new CssTranslator();
Style style = translator.translate(ss);

Here is the SLD representation of the generated style:

<?xml version="1.0" encoding="UTF-8"?><sld:StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:sld="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" version="1.0.0">
  <sld:NamedLayer>
    <sld:Name/>
    <sld:UserStyle>
      <sld:Name>Default Styler</sld:Name>
      <sld:FeatureTypeStyle>
        <sld:Rule>
          <sld:PointSymbolizer>
            <sld:Graphic>
              <sld:Mark>
                <sld:WellKnownName>circle</sld:WellKnownName>
                <sld:Fill>
                  <sld:CssParameter name="fill">#ff0000</sld:CssParameter>
                </sld:Fill>
              </sld:Mark>
              <sld:Size>6</sld:Size>
            </sld:Graphic>
          </sld:PointSymbolizer>
        </sld:Rule>
        <sld:VendorOption name="ruleEvaluation">first</sld:VendorOption>
      </sld:FeatureTypeStyle>
    </sld:UserStyle>
  </sld:NamedLayer>
</sld:StyledLayerDescriptor>