Revision 13811 trunk/libraries/libTopology/src/org/gvsig/jts/GeometryCracker.java

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GeometryCracker.java
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/*
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 * Created on 07-sep-2007
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 *
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 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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 *
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 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.
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 *
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 * For more information, contact:
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 *
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 *  Generalitat Valenciana
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 *   Conselleria d'Infraestructures i Transport
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 *   Av. Blasco Ib??ez, 50
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 *   46010 VALENCIA
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 *   SPAIN
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 *
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 *      +34 963862235
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 *   gvsig@gva.es
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 *      www.gvsig.gva.es
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 *
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 *    or
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 *
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 *   IVER T.I. S.A
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 *   Salamanca 50
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 *   46005 Valencia
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 *   Spain
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 *
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 *   +34 963163400
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 *   dac@iver.es
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 */
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/* CVS MESSAGES:
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 *
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 * $Id:
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 * $Log:
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 */
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package org.gvsig.jts;
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import com.vividsolutions.jts.algorithms.SnapCGAlgorithms;


  		




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import com.vividsolutions.jts.geom.Coordinate;


  		




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import com.vividsolutions.jts.geom.CoordinateList;


  		




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import com.vividsolutions.jts.geom.Geometry;


  		




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import com.vividsolutions.jts.geom.GeometryFactory;


  		




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import com.vividsolutions.jts.geom.LineSegment;


  		




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import com.vividsolutions.jts.geom.LinearRing;


  		




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/**


  		




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 * Cracks the geometries of a topology's layers to force the sharing of


  		




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 */


  		




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public class GeometryCracker {


  		




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	private static GeometryFactory geomFactory = new GeometryFactory();


  		




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	private LineSegment seg = new LineSegment();


  		




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	private double snapTolerance;


  		




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		GeometryCracker cracker = new GeometryCracker(snapTolerance);


  		




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		Coordinate[] newCoordsA = cracker.crackTo(a.getCoordinates(), b


  		




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				.getCoordinates());


  		




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		return createGeometry(newCoordsA, a.getGeometryType());


  		




  
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		return JtsUtil.createGeometry(newCoordsA, a.getGeometryType());


  		




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	}


  		




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	public Geometry crack(Geometry a, Geometry b){


  		




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		Coordinate[] newCoordsA = crackTo(a.getCoordinates(), b.getCoordinates());


  		




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		return createGeometry(newCoordsA, a.getGeometryType());


  		




  
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		return JtsUtil.createGeometry(newCoordsA, a.getGeometryType());


  		




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	}


  		




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	private static Geometry createGeometry(Coordinate[] coords,


  		




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			String geometryType) {


  		




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		if (geometryType.equalsIgnoreCase("POINT")) {


  		




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			return geomFactory.createPoint(coords[0]);


  		




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		} else if (geometryType.equalsIgnoreCase("LINESTRING")) {


  		




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			return geomFactory.createLineString(coords);


  		




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		}else if (geometryType.equalsIgnoreCase("LINEARRING")) {


  		




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			return geomFactory.createLinearRing(coords);


  		




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		}  


  		




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		else if (geometryType.equalsIgnoreCase("POLYGON")) {


  		




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			LinearRing exterior = geomFactory.createLinearRing(coords);


  		




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			return geomFactory.createPolygon(exterior, null);


  		




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		}


  		




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		return null;


  		




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	}


  		




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	/*


  		




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	 * This code is extracted from the class LineStringSnapper of JTS


  		




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	 */


  		












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