SplatMarkFactory.java

package org.geotools.render;

import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.GeneralPath;

import org.geotools.renderer.style.MarkFactory;
import org.opengis.feature.Feature;
import org.opengis.filter.expression.Expression;

class SplatMarkFactory implements MarkFactory {

private static GeneralPath SPLAT;

static {
    SPLAT = new GeneralPath(GeneralPath.WIND_EVEN_ODD);
    SPLAT.moveTo(-0.2f, 0.9f);
    SPLAT.lineTo(0.266f, -0.5f);
    SPLAT.lineTo(-0.366f, -0.7f);
    SPLAT.lineTo(0.4f, 1.12f);
    SPLAT.lineTo(0.3f, 1.10f);
}

public Shape getShape(Graphics2D graphics, Expression symbolUrl, Feature feature) throws Exception {
    if (symbolUrl == null) {
        // cannot handle a null url
        return null;
    }
    // Evaluate the expression as a String
    String wellKnownName = symbolUrl.evaluate(feature, String.class);
    
    if (wellKnownName != null && wellKnownName.equalsIgnoreCase("splat")) {
        return SPLAT;
    }
    return null; // we do not know this one
}
}