ingo@1052: package de.intevation.flys.utils;
ingo@1052: 
ingo@1106: import java.io.IOException;
ingo@1106: import java.io.File;
ingo@1106: import java.io.Serializable;
ingo@1106: import java.net.MalformedURLException;
ingo@1106: import java.util.ArrayList;
ingo@1106: import java.util.HashMap;
ingo@1106: import java.util.List;
ingo@1106: import java.util.Map;
ingo@1106: 
ingo@1121: import org.apache.log4j.Logger;
ingo@1121: 
ingo@1052: import com.vividsolutions.jts.geom.Coordinate;
ingo@1052: import com.vividsolutions.jts.geom.Geometry;
ingo@1052: 
ingo@1106: import org.opengis.feature.simple.SimpleFeature;
ingo@1106: import org.opengis.feature.simple.SimpleFeatureType;
ingo@1108: import org.opengis.referencing.FactoryException;
ingo@1108: import org.opengis.referencing.NoSuchAuthorityCodeException;
ingo@1107: import org.opengis.referencing.crs.CoordinateReferenceSystem;
ingo@1106: 
ingo@1106: import org.geotools.data.DataStoreFactorySpi;
ingo@1106: import org.geotools.data.FeatureStore;
ingo@1106: import org.geotools.data.DefaultTransaction;
ingo@1106: import org.geotools.data.Transaction;
ingo@1106: import org.geotools.data.shapefile.ShapefileDataStore;
ingo@1106: import org.geotools.data.shapefile.ShapefileDataStoreFactory;
ingo@1106: import org.geotools.feature.FeatureIterator;
ingo@1106: import org.geotools.feature.FeatureCollection;
ingo@1106: import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
ingo@1106: import org.geotools.geojson.feature.FeatureJSON;
ingo@1108: import org.geotools.referencing.CRS;
ingo@1052: 
ingo@1144: import de.intevation.flys.model.RiverAxis;
ingo@1144: 
ingo@1052: 
ingo@1052: public class GeometryUtils {
ingo@1052: 
ingo@1121:     private static final Logger logger = Logger.getLogger(GeometryUtils.class);
ingo@1121: 
ingo@1121: 
ingo@1052:     private GeometryUtils() {
ingo@1052:     }
ingo@1052: 
ingo@1052: 
ingo@1144:     public static String getRiverBounds(String rivername) {
ingo@1144:         RiverAxis axis = RiverAxis.getRiverAxis(rivername);
ingo@1144:         if (axis != null) {
ingo@1144:             // TODO Take the correct EPSG into account. Maybe, we need to
ingo@1144:             // reproject the geometry.
ingo@1144:             Geometry geom   = axis.getGeom().getBoundary();
ingo@1144:             return jtsBoundsToOLBounds(geom);
ingo@1144:         }
ingo@1144: 
ingo@1144:         return null;
ingo@1144:     }
ingo@1144: 
ingo@1144: 
ingo@1052:     /**
ingo@1052:      * Returns the boundary of Geometry <i>geom</i> in OpenLayers
ingo@1052:      * representation.
ingo@1052:      *
ingo@1052:      * @param geom The geometry.
ingo@1052:      *
ingo@1052:      * @return the OpenLayers boundary of <i>geom</i>.
ingo@1052:      */
ingo@1052:     public static String jtsBoundsToOLBounds(Geometry geom) {
ingo@1052:         Coordinate[] c = geom != null ? geom.getCoordinates() : null;
ingo@1052: 
ingo@1052:         if (c == null || c.length < 2) {
ingo@1052:             return null;
ingo@1052:         }
ingo@1052: 
ingo@1052:         return "" + c[0].x + " " + c[1].y + " " + c[1].x + " " + c[0].y;
ingo@1052:     }
ingo@1106: 
ingo@1106: 
ingo@1107:     public static SimpleFeatureType buildFeatureType(
ingo@1108:         String name, String srs, Class geometryType)
ingo@1107:     {
ingo@1119:         return buildFeatureType(name, srs, geometryType, null);
ingo@1119:     }
ingo@1119: 
ingo@1119: 
ingo@1119:     /**
ingo@1119:      * Creates a new SimpleFeatureType using a SimpleFeatureTypeBuilder.
ingo@1119:      *
ingo@1119:      * @param name The name of the FeatureType.
ingo@1119:      * @param srs The SRS (e.g. "EPSG:31466").
ingo@1119:      * @param geometryType The geometry type's class (e.g. Polygon.class).
ingo@1119:      * @param attrs Optional. An object with attribute-name/attribute-class
ingo@1119:      * pairs where index 0 specifies the name as string and index 1 the type
ingo@1119:      * as class.
ingo@1119:      *
ingo@1119:      * @return a new SimpleFeatureType.
ingo@1119:      */
ingo@1119:     public static SimpleFeatureType buildFeatureType(
ingo@1119:         String name, String srs, Class geometryType, Object[][] attrs)
ingo@1119:     {
ingo@1108:         try {
ingo@1108:             SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
ingo@1108:             CoordinateReferenceSystem crs    = CRS.decode(srs);
ingo@1106: 
ingo@1108:             builder.setName("flys");
ingo@1108:             builder.setNamespaceURI("http://www.intevation.de/");
ingo@1108:             builder.setCRS(crs);
ingo@1108:             builder.setSRS(srs);
ingo@1106: 
ingo@1108:             builder.add("geometry", geometryType, crs);
ingo@1106: 
ingo@1119:             if (attrs != null) {
ingo@1119:                 for (Object[] attr: attrs) {
ingo@1119:                     builder.add((String) attr[0], (Class) attr[1]);
ingo@1119:                 }
ingo@1119:             }
ingo@1119: 
ingo@1108:             return builder.buildFeatureType();
ingo@1108:         }
ingo@1108:         catch (NoSuchAuthorityCodeException nsae) {
ingo@1108:         }
ingo@1108:         catch (FactoryException fe) {
ingo@1108:         }
ingo@1108: 
ingo@1108:         return null;
ingo@1106:     }
ingo@1106: 
ingo@1106: 
ingo@1106:     public static List<SimpleFeature> parseGeoJSON(
ingo@1106:         String geojson, SimpleFeatureType ft
ingo@1106:     ) {
ingo@1106:         List<SimpleFeature> collection = new ArrayList<SimpleFeature>();
ingo@1106: 
ingo@1106:         try {
ingo@1106:             FeatureJSON fjson = new FeatureJSON();
ingo@1106:             fjson.setFeatureType(ft);
ingo@1106: 
ingo@1106:             FeatureIterator<SimpleFeature> iterator =
ingo@1106:                 fjson.streamFeatureCollection(geojson);
ingo@1106: 
ingo@1106:             while (iterator.hasNext()) {
ingo@1106:                 collection.add(iterator.next());
ingo@1106:             }
ingo@1106:         }
ingo@1106:         catch (IOException ioe) {
ingo@1106:             // TODO handle exception
ingo@1106:         }
ingo@1106: 
ingo@1106:         return collection;
ingo@1106:     }
ingo@1106: 
ingo@1106: 
ingo@1106:     public static boolean writeShapefile(
ingo@1106:         File              shape,
ingo@1106:         SimpleFeatureType featureType,
ingo@1121:         FeatureCollection collection
ingo@1121:     ) {
ingo@1164:         if (collection.isEmpty()) {
ingo@1164:             logger.warn("Shapefile is not written - no features given!");
ingo@1164:             return false;
ingo@1164:         }
ingo@1164: 
ingo@1121:         Transaction transaction = null;
ingo@1106: 
ingo@1121:         try {
ingo@1121:             Map<String, Serializable> params =
ingo@1121:                 new HashMap<String, Serializable>();
ingo@1106: 
ingo@1121:             params.put("url", shape.toURI().toURL());
ingo@1121:             params.put("create spatial index", Boolean.TRUE);
ingo@1106: 
ingo@1121:             DataStoreFactorySpi dataStoreFactory =
ingo@1121:                 new ShapefileDataStoreFactory();
ingo@1106: 
ingo@1121:             ShapefileDataStore newDataStore =
ingo@1121:                 (ShapefileDataStore)dataStoreFactory.createNewDataStore(params);
ingo@1121:             newDataStore.createSchema(featureType);
ingo@1106: 
ingo@1121:             transaction = new DefaultTransaction("create");
ingo@1121: 
ingo@1121:             String typeName = newDataStore.getTypeNames()[0];
ingo@1121: 
ingo@1121:             FeatureStore<SimpleFeatureType, SimpleFeature> featureStore =
ingo@1121:                 (FeatureStore<SimpleFeatureType, SimpleFeature>)
ingo@1121:                     newDataStore.getFeatureSource(typeName);
ingo@1121: 
ingo@1121:             featureStore.setTransaction(transaction);
ingo@1121: 
ingo@1121:             featureStore.addFeatures(collection);
ingo@1121:             transaction.commit();
ingo@1121: 
ingo@1121:             return true;
ingo@1121:         }
ingo@1121:         catch (MalformedURLException mue) {
ingo@1121:             logger.error("Unable to prepare shapefile: " + mue.getMessage());
ingo@1121:         }
ingo@1121:         catch (IOException ioe) {
ingo@1121:             logger.error("Unable to write shapefile: " + ioe.getMessage());
ingo@1121:         }
ingo@1121:         finally {
ingo@1121:             if (transaction != null) {
ingo@1121:                 try {
ingo@1121:                     logger.debug("XXX CLOSE TRANSACTION!");
ingo@1121:                     transaction.close();
ingo@1121:                 }
ingo@1121:                 catch (IOException ioe) { /* do nothing */ }
ingo@1121:             }
ingo@1121:         }
ingo@1121: 
ingo@1121:         return false;
ingo@1106:     }
ingo@1052: }
ingo@1052: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :