/**
* H2GIS is a library that brings spatial support to the H2 Database Engine
* <http://www.h2database.com>. H2GIS is developed by CNRS
* <http://www.cnrs.fr/>.
*
* This code is part of the H2GIS project. H2GIS 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 3.0 of the License.
*
* H2GIS 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 <http://www.gnu.org/licenses/>.
*
*
* For more information, please consult: <http://www.h2gis.org/>
* or contact directly: info_at_h2gis.org
*/
package org.h2gis.functions.spatial.convert;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.io.ParseException;
import com.vividsolutions.jts.io.WKBReader;
import java.sql.SQLException;
import org.h2gis.api.DeterministicScalarFunction;
/**
* Convert a WKB object to a geometry
*
* @author Erwan Bocher
*/
public class ST_GeomFromWKB extends DeterministicScalarFunction{
public ST_GeomFromWKB(){
addProperty(PROP_REMARKS, "Convert a binary large object to a geometry object.\n"
+ "An optional integer parameter could be used to specify the SRID."
);
}
@Override
public String getJavaStaticMethod() {
return "toGeometry";
}
/**
* Convert a WKB representation to a geometry
* @param bytes the input WKB object
* @param srid the input SRID
* @return
* @throws SQLException
*/
public static Geometry toGeometry(byte[] bytes, int srid) throws SQLException{
if(bytes==null) {
return null;
}
WKBReader wkbReader = new WKBReader();
try {
Geometry geometry = wkbReader.read(bytes);
geometry.setSRID(srid);
return geometry;
} catch (ParseException ex) {
throw new SQLException("Cannot parse the input bytes",ex);
}
}
/**
* Convert a WKB representation to a geometry without specify a SRID.
* @param bytes
* @return
* @throws SQLException
*/
public static Geometry toGeometry(byte[] bytes) throws SQLException{
return toGeometry(bytes, 0);
}
}