/**
* 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.distance;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import org.h2gis.api.DeterministicScalarFunction;
/**
* Returns the 2-dimensional longest line between the points of two geometries.
* @author Erwan Bocher
*/
public class ST_LongestLine extends DeterministicScalarFunction{
public ST_LongestLine(){
addProperty(PROP_REMARKS, "Returns the 2-dimensional longest line between the points of two geometries."
+ "If the geometry 1 and geometry 2 is the same geometry the function will \n "
+ "return the longest line between the two vertices most far from each other in that geometry.");
}
@Override
public String getJavaStaticMethod() {
return "longestLine";
}
/**
* Return the longest line between the points of two geometries.
* @param geomA
* @param geomB
* @return
*/
public static Geometry longestLine(Geometry geomA, Geometry geomB) {
Coordinate[] coords = new MaxDistanceOp(geomA, geomB).getCoordinatesDistance();
if(coords!=null){
return geomA.getFactory().createLineString(coords);
}
return null;
}
}