root / trunk / extensions / extGeoProcessing / src / com / iver / cit / gvsig / geoprocess / impl / convexhull / fmap / ScalableConvexHullVisitor.java @ 6877
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| 1 | 5918 | azabala | /*
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| 2 | * Created on 16-feb-2006
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| 3 | *
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| 4 | * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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| 5 | *
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| 6 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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| 7 | *
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| 8 | * This program is free software; you can redistribute it and/or
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| 9 | * modify it under the terms of the GNU General Public License
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| 10 | * as published by the Free Software Foundation; either version 2
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| 11 | * of the License, or (at your option) any later version.
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| 12 | *
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| 13 | * This program is distributed in the hope that it will be useful,
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | * GNU General Public License for more details.
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| 17 | *
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| 18 | * You should have received a copy of the GNU General Public License
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| 19 | * along with this program; if not, write to the Free Software
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| 20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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| 21 | *
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| 22 | * For more information, contact:
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| 23 | *
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| 24 | * Generalitat Valenciana
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| 25 | * Conselleria d'Infraestructures i Transport
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| 26 | * Av. Blasco Ib??ez, 50
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| 27 | * 46010 VALENCIA
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| 28 | * SPAIN
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| 29 | *
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| 30 | * +34 963862235
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| 31 | * gvsig@gva.es
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| 32 | * www.gvsig.gva.es
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| 33 | *
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| 34 | * or
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| 35 | *
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| 36 | * IVER T.I. S.A
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| 37 | * Salamanca 50
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| 38 | * 46005 Valencia
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| 39 | * Spain
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| 40 | *
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| 41 | * +34 963163400
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| 42 | * dac@iver.es
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| 43 | */
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| 44 | /* CVS MESSAGES:
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| 45 | *
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| 46 | * $Id$
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| 47 | * $Log$
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| 48 | * Revision 1.1 2006-06-20 18:20:45 azabala
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| 49 | * first version in cvs
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| 50 | *
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| 51 | * Revision 1.2 2006/06/02 18:21:28 azabala
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| 52 | * *** empty log message ***
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| 53 | *
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| 54 | * Revision 1.1 2006/05/24 21:13:31 azabala
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| 55 | * primera version en cvs despues de refactoring orientado a crear un framework extensible de geoprocessing
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| 56 | *
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| 57 | * Revision 1.3 2006/03/15 18:31:06 azabala
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| 58 | * *** empty log message ***
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| 59 | *
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| 60 | * Revision 1.2 2006/03/07 21:01:33 azabala
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| 61 | * *** empty log message ***
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| 62 | *
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| 63 | * Revision 1.1 2006/03/06 19:48:39 azabala
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| 64 | * *** empty log message ***
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| 65 | *
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| 66 | * Revision 1.2 2006/03/05 19:57:48 azabala
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| 67 | * *** empty log message ***
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| 68 | *
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| 69 | * Revision 1.1 2006/02/17 16:32:50 azabala
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| 70 | * *** empty log message ***
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| 71 | *
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| 72 | *
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| 73 | */
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| 74 | package com.iver.cit.gvsig.geoprocess.impl.convexhull.fmap; |
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| 75 | |||
| 76 | import com.iver.cit.gvsig.fmap.core.IGeometry; |
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| 77 | import com.iver.cit.gvsig.fmap.core.v02.FConverter; |
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| 78 | import com.iver.cit.gvsig.fmap.layers.FLayer; |
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| 79 | import com.iver.cit.gvsig.fmap.layers.layerOperations.VectorialData; |
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| 80 | import com.iver.cit.gvsig.fmap.operations.strategies.VisitException; |
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| 81 | import com.vividsolutions.jts.geom.Geometry; |
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| 82 | import com.vividsolutions.jts.geom.GeometryCollection; |
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| 83 | import com.vividsolutions.jts.geom.GeometryFactory; |
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| 84 | |||
| 85 | public class ScalableConvexHullVisitor implements ConvexHullVisitor { |
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| 86 | Geometry geometry; |
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| 87 | GeometryFactory geomFact; |
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| 88 | |||
| 89 | public ScalableConvexHullVisitor(){
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| 90 | geomFact = new GeometryFactory();
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| 91 | } |
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| 92 | /**
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| 93 | * Returns FMap convex hull geometry.
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| 94 | * @return
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| 95 | */
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| 96 | public IGeometry getConvexHull(){
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| 97 | return FConverter.jts_to_igeometry(geometry);
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| 98 | } |
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| 99 | |||
| 100 | public Geometry getJtsConvexHull(){
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| 101 | return geometry;
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| 102 | } |
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| 103 | |||
| 104 | public void visit(IGeometry g, int index) throws VisitException { |
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| 105 | if(g == null) |
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| 106 | return;
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| 107 | Geometry actualGeometry = g.toJTSGeometry(); |
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| 108 | if(geometry == null){ |
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| 109 | geometry = actualGeometry; |
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| 110 | }else{
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| 111 | Geometry[] geoms = new Geometry[2]; |
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| 112 | geoms[0] = geometry;
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| 113 | geoms[1] = actualGeometry;
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| 114 | GeometryCollection gc = geomFact. |
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| 115 | createGeometryCollection(geoms); |
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| 116 | geometry = gc.convexHull(); |
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| 117 | } |
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| 118 | } |
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| 119 | |||
| 120 | public void stop(FLayer layer) { |
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| 121 | } |
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| 122 | |||
| 123 | public boolean start(FLayer layer) { |
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| 124 | return layer instanceof VectorialData; |
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| 125 | } |
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| 126 | |||
| 127 | public String getProcessDescription() { |
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| 128 | return "Computing convex hull in an scalable manner"; |
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| 129 | } |
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| 130 | |||
| 131 | } |