| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

*

* Copyright (C) 2007-2008 Infrastructures and Transports Department

* of the Valencian Government (CIT)

* 

* This program is free software; you can redistribute it and/or

* modify it under the terms of the GNU General Public License

* as published by the Free Software Foundation; either version 2

* of the License, or (at your option) any later version.

* 

* 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.

* 

* You should have received a copy of the GNU General Public License

* along with this program; if not, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

* MA  02110-1301, USA.

* 

*/

package org.gvsig.fmap.geom.operation.tojts;

import java.awt.geom.PathIterator;

import java.util.ArrayList;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.operation.GeometryOperationContext;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.CoordinateArrays;

import com.vividsolutions.jts.geom.LinearRing;

import com.vividsolutions.jts.geom.MultiLineString;

/**

 * Converts a Surface2D into a MultiLineString object

 * @author <a href="mailto:nachobrodin@gmail.com">Nacho Brodin</a>

 */

public class Surface2DToJTSLineString extends ToJTS {

        public static final String NAME = "toJTSLineString";

        public static final int CODE = geomManager.getGeometryOperationCode(NAME);

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.geom.operation.tojts.ToJTS#invoke(org.gvsig.fmap.geom.Geometry, org.gvsig.fmap.geom.operation.GeometryOperationContext)

         */

        public Object invoke(Geometry geom, GeometryOperationContext ctx) throws GeometryOperationException {

                int srid = -1;

                if (ctx != null){

                        srid = ((JTSGeometryOperationContext)ctx).getSrid();

                }

                PathIterator theIterator = geom.getPathIterator(null, geomManager.getFlatness());

                int theType;

                double[] theData = new double[6];

                ArrayList arrayCoords = null;

                Coordinate[] points = null;

                ArrayList listRings = new ArrayList();

                theIterator = geom.getPathIterator(null, geomManager.getFlatness());

                while (!theIterator.isDone()) {

                        theType = theIterator.currentSegment(theData);

                        switch (theType) {

                        case PathIterator.SEG_MOVETO:

                                if (arrayCoords == null) {

                                        arrayCoords = new ArrayList();

                                } else

                                        arrayCoords.clear();

                                arrayCoords.add(new Coordinate(theData[0], theData[1]));

                                break;

                        case PathIterator.SEG_LINETO:

                                arrayCoords.add(new Coordinate(theData[0],theData[1]));

                                break;

                        case PathIterator.SEG_QUADTO:

                                System.out.println("SEG_QUADTO Not supported here");

                                break;

                        case PathIterator.SEG_CUBICTO:

                                System.out.println("SEG_CUBICTO Not supported here");

                                break;

                        case PathIterator.SEG_CLOSE:

                                break;

                        }

                        theIterator.next();

                } 

                Coordinate firstCoord = (Coordinate) arrayCoords.get(0);

                Coordinate lastCoord = (Coordinate) arrayCoords.get(arrayCoords.size() - 1);

                if (!isClosed(firstCoord, lastCoord)) {

                        arrayCoords.add(firstCoord);

                }

                points = CoordinateArrays.toCoordinateArray(arrayCoords);

                listRings.add(geomFactory.createLinearRing(points));

                LinearRing[] list = (LinearRing[])listRings.toArray(new LinearRing[listRings.size()]);

                MultiLineString lineStr = new com.vividsolutions.jts.geom.GeometryFactory().createMultiLineString(list);

                lineStr.setSRID(srid);

                return lineStr;

        }

}