/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.swing.testutils;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import org.geotools.TestData;
import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.geometry.DirectPosition2D;
import org.geotools.geometry.jts.Geometries;
import org.geotools.map.FeatureLayer;
import org.geotools.map.Layer;
import org.geotools.styling.SLD;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
/**
* Provides static methods to load and access test data, thus reducing duplicated
* code in test classes.
*
* @author Michael Bedward
* @since 8.0
* @source $URL$
* @version $Id$
*/
public class TestDataUtils {
/**
* Creates a new {@linkplain FeatureLayer} containing polygon feature data.
*
* @return the new layer
* @throws Exception on error accessing the test data
*/
public static Layer getPolygonLayer() throws Exception {
URL url = TestData.url("shapes/statepop.shp");
return createLayer(url);
}
/**
* Creates a new {@linkplain FeatureLayer} containing line feature data.
*
* @return the new layer
* @throws Exception on error accessing the test data
*/
public static Layer getLineLayer() throws Exception {
URL url = TestData.url("shapes/roads.shp");
return createLayer(url);
}
/**
* Creates a new {@linkplain FeatureLayer} containing point feature data.
*
* @return the new layer
* @throws Exception on error accessing the test data
*/
public static Layer getPointLayer() throws Exception {
URL url = TestData.url("shapes/archsites.shp");
return createLayer(url);
}
/**
* Gets a world position which lies in or on the given feature.
*
* @param feature the feature
* @return a position in or on the feature
*/
public static DirectPosition2D getPosInFeature(SimpleFeature feature) {
if (feature == null) {
throw new IllegalArgumentException("feature argument must not be null");
}
Geometry geom = (Geometry) feature.getDefaultGeometry();
Coordinate c = null;
switch (Geometries.get(geom)) {
case MULTIPOLYGON:
case POLYGON:
c = geom.getCentroid().getCoordinate();
break;
case MULTILINESTRING:
case LINESTRING:
Coordinate[] coords = geom.getCoordinates();
c = coords[coords.length / 2];
break;
case MULTIPOINT:
case POINT:
c = geom.getCoordinate();
break;
default:
throw new IllegalArgumentException("Unsupported geometry type");
}
CoordinateReferenceSystem crs = feature.getFeatureType().getCoordinateReferenceSystem();
return new DirectPosition2D(crs, c.x, c.y);
}
/**
* Creates a new {@linkplain FeatureLayer}.
*
* @param url location of the feature data
* @return the new layer
* @throws Exception on error accessing the feature data
*/
private static Layer createLayer(URL url) throws Exception {
Map params = new HashMap();
params.put("url", url);
DataStore dataStore = DataStoreFinder.getDataStore(params);
String typeName = dataStore.getTypeNames()[0];
SimpleFeatureSource featureSource = dataStore.getFeatureSource(typeName);
return new FeatureLayer(featureSource, SLD.createSimpleStyle(featureSource.getSchema()));
}
}