/**
* Copyright (C) 2012-2017 52°North Initiative for Geospatial Open Source
* Software GmbH
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* If the program is linked with libraries which are licensed under one of
* the following licenses, the combination of the program with the linked
* library is not considered a "derivative work" of the program:
*
* - Apache License, version 2.0
* - Apache Software License, version 1.0
* - GNU Lesser General Public License, version 3
* - Mozilla Public License, versions 1.0, 1.1 and 2.0
* - Common Development and Distribution License (CDDL), version 1.0
*
* Therefore the distribution of the program linked with libraries licensed
* under the aforementioned licenses, is permitted by the copyright holders
* if the distribution is compliant with both the GNU General Public
* License version 2 and the aforementioned licenses.
*
* This program 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 General
* Public License for more details.
*/
package org.n52.sos.util;
import org.n52.sos.exception.ows.InvalidParameterValueException;
import org.n52.sos.exception.ows.concrete.InvalidSridException;
import org.n52.sos.ogc.ows.OwsExceptionReport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateFilter;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.PrecisionModel;
import com.vividsolutions.jts.io.ParseException;
import com.vividsolutions.jts.io.WKTReader;
/**
* Utility class for the Java Topology Suite.
*
* @since 4.0.0
*
*/
public class JTSHelper implements Constants {
private static final Logger LOGGER = LoggerFactory.getLogger(JTSHelper.class);
public static final CoordinateFilter COORDINATE_SWITCHING_FILTER = new CoordinateFilter() {
@Override
public void filter(Coordinate coord) {
double tmp = coord.x;
coord.x = coord.y;
coord.y = tmp;
}
};
/**
* Creates a JTS Geometry from an WKT representation. Switches the
* coordinate order if needed.
* <p/>
*
* @param wkt
* WKT representation of the geometry
* @param srid
* the SRID of the newly created geometry
* <p/>
* @return JTS Geometry object
* <p/>
* @throws OwsExceptionReport
* If an error occurs
*/
public static Geometry createGeometryFromWKT(String wkt, int srid) throws OwsExceptionReport {
WKTReader wktReader = getWKTReaderForSRID(srid);
try {
LOGGER.debug("FOI Geometry: {}", wkt);
return wktReader.read(wkt);
} catch (ParseException pe) {
throw new InvalidParameterValueException().causedBy(pe).withMessage(
"Error while parsing the geometry of featureOfInterest parameter");
}
}
public static WKTReader getWKTReaderForSRID(int srid) throws OwsExceptionReport {
if (srid <= 0) {
throw new InvalidSridException(srid);
}
return new WKTReader(getGeometryFactoryForSRID(srid));
}
/**
* Get the coordinates of a Geometry as String.
*
* @param geom
* Geometry to get coordinates
* <p/>
* @return Coordinates as String
* <p/>
* @throws OwsExceptionReport
* if the SRID is <= 0
*/
public static String getCoordinatesString(Geometry geom) throws OwsExceptionReport {
StringBuilder builder = new StringBuilder();
Coordinate[] sourceCoords = geom.getCoordinates();
if (sourceCoords.length > 0) {
getCoordinateString(builder, sourceCoords[0]);
for (int i = 1; i < sourceCoords.length; ++i) {
getCoordinateString(builder.append(BLANK_CHAR), sourceCoords[i]);
}
}
return builder.toString();
}
protected static StringBuilder getCoordinateString(StringBuilder builder, Coordinate coordinate) {
builder.append(coordinate.x);
builder.append(BLANK_CHAR);
builder.append(coordinate.y);
if (!Double.isNaN(coordinate.z)) {
builder.append(BLANK_CHAR);
builder.append(coordinate.z);
}
return builder;
}
/**
* Creates a WKT Polygon representation from lower and upper corner values.
* <p/>
*
* @param lowerCorner
* Lower corner coordinates
* @param upperCorner
* Upper corner coordinates
* <p/>
* @return WKT Polygon
*/
public static String createWKTPolygonFromEnvelope(String lowerCorner, String upperCorner) {
final String[] splittedLowerCorner = lowerCorner.split(BLANK_STRING);
final String[] splittedUpperCorner = upperCorner.split(BLANK_STRING);
final String minX = splittedLowerCorner[0];
final String minY = splittedLowerCorner[1];
final String maxX = splittedUpperCorner[0];
final String maxY = splittedUpperCorner[1];
StringBuilder sb = new StringBuilder();
sb.append(JTSConstants.WKT_POLYGON).append(" ((");
sb.append(minX).append(BLANK_CHAR).append(minY).append(COMMA_CHAR);
sb.append(minX).append(BLANK_CHAR).append(maxY).append(COMMA_CHAR);
sb.append(maxX).append(BLANK_CHAR).append(maxY).append(COMMA_CHAR);
sb.append(maxX).append(BLANK_CHAR).append(minY).append(COMMA_CHAR);
sb.append(minX).append(BLANK_CHAR).append(minY).append("))");
return sb.toString();
}
/**
* Switches the coordinates of a JTS Geometry.
* <p/>
*
* @param <G>
* the geometry type
* @param geometry
* Geometry to switch coordinates.
* <p/>
* @return Geometry with switched coordinates
* <p/>
* @throws OwsExceptionReport
* *
* <p/>
*/
public static <G extends Geometry> G switchCoordinateAxisOrder(G geometry) throws OwsExceptionReport {
if (geometry == null) {
return null;
}
@SuppressWarnings("unchecked")
G geom = (G) geometry.clone();
geom.apply(COORDINATE_SWITCHING_FILTER);
geom.geometryChanged();
return geom;
}
public static GeometryFactory getGeometryFactory(Geometry geometry) {
if (geometry.getFactory().getSRID() > 0 || geometry.getSRID() == 0) {
return geometry.getFactory();
} else {
return getGeometryFactoryForSRID(geometry.getSRID());
}
}
public static GeometryFactory getGeometryFactoryForSRID(int srid) {
return new GeometryFactory(new PrecisionModel(PrecisionModel.FLOATING), srid);
}
/**
* Creates a WKT Point string form coordinate string.
*
* @param coordinates
* Coordinate string
* @return WKT Point string
*/
public static String createWKTPointFromCoordinateString(String coordinates) {
return JTSConstants.WKT_POINT + "(" + coordinates + ")";
}
protected JTSHelper() {
}
public static boolean isNotEmpty(Geometry geometry) {
return geometry != null && !geometry.isEmpty();
}
}