Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/utils/GeometryUtils.java @ 1627:d1b20d0e9eb4
Let WDifferencesCurveGenerator process LONGITUDINAL_W facets.
flys-artifacts/trunk@2802 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 21 Sep 2011 13:53:09 +0000 |
parents | 0398c2b8dbaf |
children | eb3ab28d1c21 |
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package de.intevation.flys.utils; import java.io.IOException; import java.io.File; import java.io.Serializable; import java.net.MalformedURLException; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.log4j.Logger; import com.vividsolutions.jts.geom.Coordinate; import com.vividsolutions.jts.geom.Geometry; import org.opengis.feature.simple.SimpleFeature; import org.opengis.feature.simple.SimpleFeatureType; import org.opengis.referencing.FactoryException; import org.opengis.referencing.NoSuchAuthorityCodeException; import org.opengis.referencing.crs.CoordinateReferenceSystem; import org.geotools.data.DataStoreFactorySpi; import org.geotools.data.FeatureStore; import org.geotools.data.DefaultTransaction; import org.geotools.data.Transaction; import org.geotools.data.shapefile.ShapefileDataStore; import org.geotools.data.shapefile.ShapefileDataStoreFactory; import org.geotools.feature.FeatureIterator; import org.geotools.feature.FeatureCollection; import org.geotools.feature.simple.SimpleFeatureTypeBuilder; import org.geotools.geojson.feature.FeatureJSON; import org.geotools.referencing.CRS; import de.intevation.flys.model.RiverAxis; public class GeometryUtils { private static final Logger logger = Logger.getLogger(GeometryUtils.class); private GeometryUtils() { } public static String getRiverBounds(String rivername) { RiverAxis axis = RiverAxis.getRiverAxis(rivername); if (axis != null) { // TODO Take the correct EPSG into account. Maybe, we need to // reproject the geometry. Geometry geom = axis.getGeom().getBoundary(); return jtsBoundsToOLBounds(geom); } return null; } /** * Returns the boundary of Geometry <i>geom</i> in OpenLayers * representation. * * @param geom The geometry. * * @return the OpenLayers boundary of <i>geom</i>. */ public static String jtsBoundsToOLBounds(Geometry geom) { Coordinate[] c = geom != null ? geom.getCoordinates() : null; if (c == null || c.length < 2) { return null; } return "" + c[0].x + " " + c[1].y + " " + c[1].x + " " + c[0].y; } public static SimpleFeatureType buildFeatureType( String name, String srs, Class geometryType) { return buildFeatureType(name, srs, geometryType, null); } /** * Creates a new SimpleFeatureType using a SimpleFeatureTypeBuilder. * * @param name The name of the FeatureType. * @param srs The SRS (e.g. "EPSG:31466"). * @param geometryType The geometry type's class (e.g. Polygon.class). * @param attrs Optional. An object with attribute-name/attribute-class * pairs where index 0 specifies the name as string and index 1 the type * as class. * * @return a new SimpleFeatureType. */ public static SimpleFeatureType buildFeatureType( String name, String srs, Class geometryType, Object[][] attrs) { try { SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder(); CoordinateReferenceSystem crs = CRS.decode(srs); builder.setName("flys"); builder.setNamespaceURI("http://www.intevation.de/"); builder.setCRS(crs); builder.setSRS(srs); builder.add("geometry", geometryType, crs); if (attrs != null) { for (Object[] attr: attrs) { builder.add((String) attr[0], (Class) attr[1]); } } return builder.buildFeatureType(); } catch (NoSuchAuthorityCodeException nsae) { } catch (FactoryException fe) { } return null; } public static List<SimpleFeature> parseGeoJSON( String geojson, SimpleFeatureType ft ) { List<SimpleFeature> collection = new ArrayList<SimpleFeature>(); try { FeatureJSON fjson = new FeatureJSON(); fjson.setFeatureType(ft); FeatureIterator<SimpleFeature> iterator = fjson.streamFeatureCollection(geojson); while (iterator.hasNext()) { collection.add(iterator.next()); } } catch (IOException ioe) { // TODO handle exception } return collection; } public static boolean writeShapefile( File shape, SimpleFeatureType featureType, FeatureCollection collection ) { if (collection.isEmpty()) { logger.warn("Shapefile is not written - no features given!"); return false; } Transaction transaction = null; try { Map<String, Serializable> params = new HashMap<String, Serializable>(); params.put("url", shape.toURI().toURL()); params.put("create spatial index", Boolean.TRUE); DataStoreFactorySpi dataStoreFactory = new ShapefileDataStoreFactory(); ShapefileDataStore newDataStore = (ShapefileDataStore)dataStoreFactory.createNewDataStore(params); newDataStore.createSchema(featureType); transaction = new DefaultTransaction("create"); String typeName = newDataStore.getTypeNames()[0]; FeatureStore<SimpleFeatureType, SimpleFeature> featureStore = (FeatureStore<SimpleFeatureType, SimpleFeature>) newDataStore.getFeatureSource(typeName); featureStore.setTransaction(transaction); featureStore.addFeatures(collection); transaction.commit(); return true; } catch (MalformedURLException mue) { logger.error("Unable to prepare shapefile: " + mue.getMessage()); } catch (IOException ioe) { logger.error("Unable to write shapefile: " + ioe.getMessage()); } finally { if (transaction != null) { try { logger.debug("XXX CLOSE TRANSACTION!"); transaction.close(); } catch (IOException ioe) { /* do nothing */ } } } return false; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :