root / branches / v2_0_0_prep / libraries / libFMap_geometries / src / org / gvsig / fmap / geom / operation / tojts / Surface2DToJTS.java @ 38452
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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/*
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* AUTHORS (In addition to CIT):
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* 2009 {Iver T.I.} {Task}
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*/
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package org.gvsig.fmap.geom.operation.tojts; |
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import java.awt.geom.PathIterator; |
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import java.util.ArrayList; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.operation.GeometryOperationContext; |
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import org.gvsig.fmap.geom.operation.GeometryOperationException; |
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import com.vividsolutions.jts.algorithm.CGAlgorithms; |
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import com.vividsolutions.jts.geom.Coordinate; |
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import com.vividsolutions.jts.geom.CoordinateArrays; |
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import com.vividsolutions.jts.geom.Envelope; |
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import com.vividsolutions.jts.geom.LineString; |
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import com.vividsolutions.jts.geom.LinearRing; |
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import com.vividsolutions.jts.geom.Polygon; |
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/**
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* @author <a href="mailto:jpiera@gvsig.org">Jorge Piera</a>
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*/
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public class Surface2DToJTS extends ToJTS{ |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.geom.operation.tojts.ToJTS#invoke(org.gvsig.fmap.geom.Geometry, org.gvsig.fmap.geom.operation.GeometryOperationContext)
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*/
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public Object invoke(Geometry geom, GeometryOperationContext ctx) throws GeometryOperationException { |
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int srid = -1; |
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if (ctx != null){ |
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srid = ((JTSGeometryOperationContext)ctx).getSrid(); |
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} |
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ArrayList arrayLines = new ArrayList(); |
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PathIterator theIterator = geom.getPathIterator(null, geomManager.getFlatness()); |
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int theType;
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double[] theData = new double[6]; |
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ArrayList arrayCoords = null; |
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LineString lin; |
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int numParts = 0; |
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Coordinate coord; |
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ArrayList shells = new ArrayList(); |
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ArrayList holes = new ArrayList(); |
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Coordinate[] points = null; |
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while (!theIterator.isDone()) {
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//while not done
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theType = theIterator.currentSegment(theData); |
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//Populate a segment of the new
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// GeneralPathX object.
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//Process the current segment to populate a new
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// segment of the new GeneralPathX object.
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switch (theType) {
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case PathIterator.SEG_MOVETO: |
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// System.out.println("SEG_MOVETO");
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if (arrayCoords == null) { |
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arrayCoords = new ArrayList(); |
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} else {
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points = CoordinateArrays.toCoordinateArray(arrayCoords); |
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try {
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LinearRing ring = geomFactory.createLinearRing(points); |
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if (CGAlgorithms.isCCW(points)) {
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holes.add(ring); |
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} else {
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shells.add(ring); |
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} |
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} catch (Exception e) { |
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/* (jaume) caso cuando todos los puntos son iguales
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* devuelvo el propio punto
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*/
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boolean same = true; |
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for (int i = 0; i < points.length-1 && same; i++) { |
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if (points[i].x != points[i+1].x || |
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points[i].y != points[i+1].y /*|| |
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points[i].z != points[i+1].z*/
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) {
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same = false;
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} |
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} |
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if (same) {
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return geomFactory.createPoint(points[0]); |
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} |
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/*
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* caso cuando es una l�nea de 3 puntos, no creo un LinearRing, sino
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* una linea
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*/
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if (points.length>1 && points.length<=3) { |
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// return geomFactory.createLineString(points);
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return geomFactory.createMultiLineString(new LineString[] {geomFactory.createLineString(points)}); |
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} |
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System.err.println(
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"Caught Topology exception in GMLLinearRingHandler");
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return null; |
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} |
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/* if (numParts == 1)
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{
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linRingExt = new GeometryFactory().createLinearRing(
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CoordinateArrays.toCoordinateArray(arrayCoords));
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}
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else
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{
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linRing = new GeometryFactory().createLinearRing(
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CoordinateArrays.toCoordinateArray(arrayCoords));
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arrayLines.add(linRing);
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} */
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arrayCoords = new ArrayList(); |
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} |
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numParts++; |
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arrayCoords.add(new Coordinate(theData[0], |
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theData[1]));
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break;
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case PathIterator.SEG_LINETO: |
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// System.out.println("SEG_LINETO");
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arrayCoords.add(new Coordinate(theData[0], |
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theData[1]));
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break;
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case PathIterator.SEG_QUADTO: |
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System.out.println("SEG_QUADTO Not supported here"); |
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break;
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case PathIterator.SEG_CUBICTO: |
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System.out.println("SEG_CUBICTO Not supported here"); |
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break;
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case PathIterator.SEG_CLOSE: |
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// A�adimos el primer punto para cerrar.
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Coordinate firstCoord = (Coordinate) arrayCoords.get(0);
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arrayCoords.add(new Coordinate(firstCoord.x,
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firstCoord.y)); |
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break;
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} //end switch
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// System.out.println("theData[0] = " + theData[0] + " theData[1]=" + theData[1]);
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theIterator.next(); |
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} //end while loop
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Coordinate firstCoord = (Coordinate) arrayCoords.get(0);
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Coordinate lastCoord = (Coordinate) arrayCoords.get(arrayCoords |
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.size() - 1);
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if (!isClosed(firstCoord, lastCoord)) {
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arrayCoords.add(firstCoord); |
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} |
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points = CoordinateArrays.toCoordinateArray(arrayCoords); |
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try {
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LinearRing ring = geomFactory.createLinearRing(points); |
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if (CGAlgorithms.isCCW(points)) {
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holes.add(ring); |
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} else {
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shells.add(ring); |
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} |
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ring.setSRID(srid); |
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} catch (Exception e) { |
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/* (jaume) caso cuando todos los puntos son iguales
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* devuelvo el propio punto
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*/
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boolean same = true; |
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for (int i = 0; i < points.length-1 && same; i++) { |
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if (points[i].x != points[i+1].x || |
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points[i].y != points[i+1].y /*|| |
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points[i].z != points[i+1].z*/
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) {
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same = false;
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} |
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} |
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if (same) {
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com.vividsolutions.jts.geom.Geometry geoJTS = geomFactory.createPoint(points[0]);
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geoJTS.setSRID(srid); |
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return geoJTS;
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} |
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/*
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* caso cuando es una l�nea de 3 puntos, no creo un LinearRing, sino
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* una linea
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*/
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if (points.length>1 && points.length<=3) { |
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// return geomFactory.createLineString(points);
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com.vividsolutions.jts.geom.Geometry geoJTS = geomFactory |
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.createMultiLineString(new LineString[] { geomFactory |
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.createLineString(points) }); |
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geoJTS.setSRID(srid); |
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return geoJTS;
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} |
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System.err.println(
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"Caught Topology exception in GMLLinearRingHandler");
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return null; |
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} |
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/* linRing = new GeometryFactory().createLinearRing(
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CoordinateArrays.toCoordinateArray(arrayCoords)); */
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// System.out.println("NumParts = " + numParts);
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//now we have a list of all shells and all holes
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ArrayList holesForShells = new ArrayList(shells.size()); |
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for (int i = 0; i < shells.size(); i++) { |
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holesForShells.add(new ArrayList()); |
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} |
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//find homes
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for (int i = 0; i < holes.size(); i++) { |
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LinearRing testRing = (LinearRing) holes.get(i); |
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LinearRing minShell = null;
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Envelope minEnv = null;
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Envelope testEnv = testRing.getEnvelopeInternal(); |
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Coordinate testPt = testRing.getCoordinateN(0);
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LinearRing tryRing = null;
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for (int j = 0; j < shells.size(); j++) { |
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tryRing = (LinearRing) shells.get(j); |
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Envelope tryEnv = tryRing.getEnvelopeInternal(); |
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if (minShell != null) { |
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minEnv = minShell.getEnvelopeInternal(); |
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} |
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boolean isContained = false; |
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Coordinate[] coordList = tryRing.getCoordinates();
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if (tryEnv.contains(testEnv) &&
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(CGAlgorithms.isPointInRing(testPt, coordList) || |
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(pointInList(testPt, coordList)))) {
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isContained = true;
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} |
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// check if this new containing ring is smaller than the current minimum ring
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if (isContained) {
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if ((minShell == null) || minEnv.contains(tryEnv)) { |
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minShell = tryRing; |
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} |
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} |
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} |
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if (minShell == null) { |
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// System.out.println(
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// "polygon found with a hole thats not inside a shell");
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// azabala: we do the assumption that this hole is really a shell (polygon)
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// whose point werent digitized in the right order
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Coordinate[] cs = testRing.getCoordinates();
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Coordinate[] reversed = new Coordinate[cs.length]; |
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int pointIndex = 0; |
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for(int z = cs.length-1; z >= 0; z--){ |
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reversed[pointIndex] = cs[z]; |
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pointIndex++; |
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} |
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LinearRing newRing = geomFactory.createLinearRing(reversed); |
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shells.add(newRing); |
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holesForShells.add(new ArrayList()); |
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} else {
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((ArrayList) holesForShells.get(shells.indexOf(minShell))).add(testRing);
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} |
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} |
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Polygon[] polygons = new Polygon[shells.size()]; |
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for (int i = 0; i < shells.size(); i++) { |
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polygons[i] = geomFactory.createPolygon((LinearRing) shells.get( |
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i), |
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(LinearRing[]) ((ArrayList) holesForShells.get(i)).toArray( |
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new LinearRing[0])); |
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polygons[i].setSRID(srid); |
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} |
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holesForShells = null;
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shells = null;
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holes = null;
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//com.vividsolutions.jts.geom.Geometry geoJTS = geomFactory.createMultiPolygon(polygons);
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polygons[0].setSRID(srid);
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com.vividsolutions.jts.geom.Geometry geoJTS; |
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if (polygons.length == 1) { |
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geoJTS = polygons[0];
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} else {
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// its a multi part
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geoJTS = geomFactory.createMultiPolygon(polygons); |
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} |
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geoJTS.setSRID(srid); |
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return geoJTS;
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} |
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} |