| gvSIG desktop 1

/*

 * Created on 26-feb-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: FilterRectVisitor.java 10627 2007-03-06 17:10:21Z caballero $

* $Log$

* Revision 1.4  2007-03-06 17:08:55  caballero

* Exceptions

*

* Revision 1.3  2006/06/20 18:15:19  azabala

* a?adida comprobaci?n de geometria nula en la construcci?n del indice espacial

*

* Revision 1.2  2006/03/07 20:59:28  azabala

* *** empty log message ***

*

* Revision 1.1  2006/02/26 20:50:00  azabala

* *** empty log message ***

*

*

*/

package com.iver.cit.gvsig.fmap.operations.strategies;

import java.awt.geom.Rectangle2D;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.iver.cit.gvsig.exceptions.visitors.ProcessVisitorException;

import com.iver.cit.gvsig.exceptions.visitors.StartVisitorException;

import com.iver.cit.gvsig.exceptions.visitors.VisitorException;

import com.iver.cit.gvsig.fmap.core.IGeometry;

import com.iver.cit.gvsig.fmap.layers.FLayer;

/**

 * This FeatureVisitor is a spatial filter.

 * It wraps a FeatureVisitor, and only calls its visit

 * method if visited geometries are within specified rectangle.

 * @author azabala

 *

 */

public class FilterRectVisitor implements FeatureVisitor {

        private Rectangle2D rect;

        private FeatureVisitor wrappedVisitor;

        public void setRectangle(Rectangle2D rect){

                this.rect = rect;

        }

        public void visit(IGeometry g, int index) throws ReadDriverException, VisitorException, ProcessVisitorException {

                if ((g != null) && (g.intersects(rect))) {

                        wrappedVisitor.visit(g, index);

                }

        }

        public void stop(FLayer layer) throws VisitorException {

                wrappedVisitor.stop(layer);

        }

        public boolean start(FLayer layer) throws StartVisitorException {

                return wrappedVisitor.start(layer);

        }

        public FeatureVisitor getWrappedVisitor() {

                return wrappedVisitor;

        }

        public void setWrappedVisitor(FeatureVisitor wrappedVisitor) {

                this.wrappedVisitor = wrappedVisitor;

        }

        public String getProcessDescription() {

                return "Filters visit calls to a visitor by spatial criteria";

        }

}