| gvSIG desktop 1

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

import java.awt.geom.PathIterator;

import java.util.ArrayList;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

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

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

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

import org.gvsig.fmap.geom.primitive.GeneralPathX;

import org.gvsig.fmap.geom.util.Converter;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.CoordinateList;

import com.vividsolutions.jts.geom.CoordinateSequences;

import com.vividsolutions.jts.geom.impl.CoordinateArraySequence;

/**

 * This class converts the path into points, then flip it down. 

 * 

 * @author Carlos S?nchez Peri??n <a href = "mailto:csanchez@prodevelop.es"> e-mail </a>

 */

public class Flip extends GeometryOperation{

    public static final String NAME = "flip";

    private static GeometryManager geomManager = GeometryLocator.getGeometryManager();

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

        private GeneralPathX generalPathX = null;

        public int getOperationIndex() {

                return CODE;

        }

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

            generalPathX = geom.getGeneralPath();

                if(generalPathX == null){

                        //if there isn't path the operation hasn't sense.

                        return null;

            }

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

            double[] theData = new double[6];

            //Coordinate first = null;

            CoordinateList coordList = new CoordinateList();

            Coordinate c1;

            GeneralPathX newGp = new GeneralPathX();

            ArrayList listOfParts = new ArrayList();

            while (!theIterator.isDone()) {

                    //while not done

                    int type = theIterator.currentSegment(theData);

                    switch (type)

                    {

                    case (byte) PathIterator.SEG_MOVETO:

                            coordList = new CoordinateList();

                            listOfParts.add(coordList);

                            c1= new Coordinate(theData[0], theData[1]);

                            coordList.add(c1, true);

                            break;

                case (byte) PathIterator.SEG_LINETO:

                            c1= new Coordinate(theData[0], theData[1]);

                            coordList.add(c1, true);

                            break;

                    case (byte) PathIterator.SEG_CLOSE:

                            coordList.add(coordList.getCoordinate(0));

                            break;

                    }

                    theIterator.next();

            }

            for (int i=listOfParts.size()-1; i>=0; i--)

            {

                    coordList = (CoordinateList) listOfParts.get(i);

                    Coordinate[] coords = coordList.toCoordinateArray();

                    CoordinateArraySequence seq = new CoordinateArraySequence(coords);

                    CoordinateSequences.reverse(seq);

                    coords = seq.toCoordinateArray();

                    newGp.moveTo(coords[0].x, coords[0].y);

                    for (int j=1; j < coords.length; j++)

                    {

                            newGp.lineTo(coords[j].x, coords[j].y);

                    }

            }

            generalPathX.reset();

            generalPathX.append(newGp.getPathIterator(null), false);        

                return null;                

        }

}