/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library 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 2.1 of the License.
*
* This library 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.
*/
package org.geotools.gml;
import java.util.logging.Logger;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Polygon;
/**
* Creates a simple OGC box.
*
* @author Ian Turton, CCG
* @author Rob Hranac, Vision for New York
* @source $URL$
* @version $Id$
*/
public class SubHandlerBox extends SubHandler {
/** The logger for the GML module */
private static final Logger LOGGER = org.geotools.util.logging.Logging.getLogger("org.geotools.gml");
/** */
com.vividsolutions.jts.geom.Envelope e = new com.vividsolutions.jts.geom.Envelope();
/**
* Creates a new instance of GMLBoxHandler.
*/
public SubHandlerBox() {
LOGGER.entering("SubHandlerBox", "new");
LOGGER.exiting("SubHandlerBox", "new");
}
/**
* Sets a corner.
*
* @param c the coordinate of the corner.
*/
public void addCoordinate(Coordinate c) {
LOGGER.entering("SubHandlerBox", "addCoordinate", c);
e.expandToInclude(c);
LOGGER.exiting("SubHandlerBox", "addCoordinate");
}
/**
* Sets a corner.
*
* @param message The geometry to inspect.
*
* @return Flag for a complete geometry.
*/
public boolean isComplete(String message) {
LOGGER.entering("SubHandlerBox", "isComplete", message);
LOGGER.exiting("SubHandlerBox", "isComplete", Boolean.TRUE);
return true;
}
/**
* Builds and returns the polygon.
*
* @param geometryFactory the geometryFactory to be used to build the
* polygon.
*
* @return the polygon.
*/
public com.vividsolutions.jts.geom.Geometry create(
com.vividsolutions.jts.geom.GeometryFactory geometryFactory) {
LOGGER.entering("SubHandlerBox", "create", geometryFactory);
Coordinate[] c = new Coordinate[5];
c[0] = new Coordinate(e.getMinX(), e.getMinY());
c[1] = new Coordinate(e.getMinX(), e.getMaxY());
c[2] = new Coordinate(e.getMaxX(), e.getMaxY());
c[3] = new Coordinate(e.getMaxX(), e.getMinY());
c[4] = new Coordinate(e.getMinX(), e.getMinY());
com.vividsolutions.jts.geom.LinearRing r = null;
try {
r = geometryFactory.createLinearRing(c);
} catch (com.vividsolutions.jts.geom.TopologyException e) {
System.err.println("Topology Exception in GMLBoxHandler");
return null; // could this be handled better?
}
Polygon polygon = geometryFactory.createPolygon(r, null);
LOGGER.exiting("SubHandlerBox", "create", polygon);
polygon.setUserData( getSRS() );
polygon.setSRID( getSRID() );
return polygon;
}
}