Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.fmap.geom.primitive;

import java.awt.geom.AffineTransform;

import java.awt.geom.PathIterator;

import java.awt.geom.Point2D;

import org.gvsig.fmap.geom.Geometry;

/**

 * A iterator to retrieve all the points of a 

 * {@link Geometry}

 *

 * @author FJP

 */

public class PointIterator extends GeneralPathXIterator {

        /** Transform applied on the coordinates during iteration */

        private AffineTransform at;

        /** The point we are going to provide when asked for coordinates */

        private Point2D p;

        /** True when the point has been read once */

        private boolean done;

        /**

         * Creates a new PointIterator object.

         *

         * @param p The polygon

         * @param at The affine transform applied to coordinates during iteration

         */

        public PointIterator(Point2D p, AffineTransform at) {

                super(new GeneralPathX());

                if (at == null) {

                        at = new AffineTransform();

                }

                this.at = at;

                this.p = p;

                done = false;

        }

        /**

         * Return the winding rule for determining the interior of the path.

         *

         * @return <code>WIND_EVEN_ODD</code> by default.

         */

        public int getWindingRule() {

                return PathIterator.WIND_EVEN_ODD;

        }

        /**

         * @see java.awt.geom.PathIterator#next()

         */

        public void next() {

                done = true;

        }

        /**

         * @see java.awt.geom.PathIterator#isDone()

         */

        public boolean isDone() {

                return done;

        }

        /**

         * @see java.awt.geom.PathIterator#currentSegment(double[])

         */

        public int currentSegment(double[] coords) {

                coords[0] = p.getX();

                coords[1] = p.getY();

                at.transform(coords, 0, coords, 0, 1);

                return PathIterator.SEG_MOVETO;

        }

        /* (non-Javadoc)

         * @see java.awt.geom.PathIterator#currentSegment(float[])

         */

        public int currentSegment(float[] coords) {

                coords[0] = (float) p.getX();

                coords[1] = (float) p.getY();

                at.transform(coords, 0, coords, 0, 1);

                return PathIterator.SEG_MOVETO;

        }

}