DataExamples.java

/**
 * 
 */
package org.geotools.cql;

import java.io.IOException;
import java.text.SimpleDateFormat;

import org.apache.commons.io.FileUtils;
import org.geotools.data.DataUtilities;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.geotools.geometry.jts.JTSFactoryFinder;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.MultiPolygon;
import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.io.WKTReader;

/**
 * This utility class provide the data required by the CQL/ECQL examples.
 * 
 * @author Mauricio Pazos
 *
 */
final class DataExamples extends ECQLExamples {
	
	
	private DataExamples(){
		// utility class
	}
	
    /**
     * Creates a feature that represent New York city
     * @return a Feature
     * @throws Exception
     */
	static public SimpleFeature createCity() throws Exception {

		final SimpleFeatureType type = DataUtilities.createType("Location",
				"geometry:Point:srid=4326," + "cityName:String,"
						+ "over65YearsOld:Double," + "under18YearsOld:Double,"
						+ "population:Integer," + "lastEarthQuake:Date");
		SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(type);

		GeometryFactory geometryFactory = JTSFactoryFinder
				.getGeometryFactory(null);

		Point point = geometryFactory.createPoint(new Coordinate(-17.2053,
				11.9517));

		featureBuilder.add(point);
		featureBuilder.add("New York");
		featureBuilder.add(22.6);
		featureBuilder.add(13.4);
		featureBuilder.add(19541453);

		SimpleDateFormat dateFormatter = new SimpleDateFormat(
				"yyyy-MM-dd'T'HH:mm:ss'Z'");
		featureBuilder.add(dateFormatter.parse("1737-11-30T01:30:00Z"));

		SimpleFeature feature = featureBuilder.buildFeature(null);

		return feature;
	}	
	
    
    public static SimpleFeature createCountry() throws Exception {

        final SimpleFeatureType type = DataUtilities.createType("Location",
                "geometry:Polygon:srid=4326," + 
                "countryName:String," + 
                "population:Integer," +
                "principalMineralResource:String"
        );
        SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(type);

        WKTReader reader = new WKTReader();
        MultiPolygon geometry = (MultiPolygon) reader.read(usaGeometry()); 

        featureBuilder.add(geometry);
        featureBuilder.add("USA");
        featureBuilder.add(307006550);
        featureBuilder.add("oil");
        
        SimpleFeature feature = featureBuilder.buildFeature(null);

        return feature;
    }

    static private String usaGeometry() {
        try {
            return FileUtils.readFileToString(
                    DataUtilities.urlToFile(DataExamples.class.getResource("usa-geometry.wkt")),
                    "UTF-8");
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Show USA geometry can be loaded and used to make a SimpleFeature.
     */
    public static void main(String[] args) {
        try {
            System.out.println(createCountry());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}