root / trunk / extensions / extGeoProcessing / src / com / iver / cit / gvsig / geoprocess / merge / fmap / MergeVisitor.java @ 5412
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| 1 | 5412 | azabala | /*
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| 2 | * Created on 05-mar-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 2006-05-24 21:10:15 azabala
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| 49 | * primera version en cvs despues de refactoring orientado a crear un framework extensible de geoprocessing
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| 50 | *
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| 51 | * Revision 1.5 2006/03/23 21:05:11 azabala
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| 52 | * *** empty log message ***
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| 53 | *
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| 54 | * Revision 1.4 2006/03/17 19:53:34 azabala
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| 55 | * *** empty log message ***
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| 56 | *
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| 57 | * Revision 1.3 2006/03/14 18:32:46 fjp
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| 58 | * Cambio con LayerDefinition para que sea compatible con la definici?n de tablas tambi?n.
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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 2006/03/05 19:59:16 azabala
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| 64 | * *** empty log message ***
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| 65 | *
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| 66 | *
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| 67 | */
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| 68 | package com.iver.cit.gvsig.geoprocess.merge.fmap; |
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| 69 | |||
| 70 | import com.hardcode.gdbms.engine.values.Value; |
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| 71 | import com.hardcode.gdbms.engine.values.ValueFactory; |
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| 72 | import com.iver.cit.gvsig.fmap.DriverException; |
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| 73 | import com.iver.cit.gvsig.fmap.core.IFeature; |
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| 74 | import com.iver.cit.gvsig.fmap.core.IGeometry; |
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| 75 | import com.iver.cit.gvsig.fmap.drivers.FieldDescription; |
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| 76 | import com.iver.cit.gvsig.fmap.drivers.ITableDefinition; |
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| 77 | import com.iver.cit.gvsig.fmap.edition.EditionException; |
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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.SelectableDataSource; |
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| 80 | import com.iver.cit.gvsig.fmap.layers.layerOperations.AlphanumericData; |
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| 81 | import com.iver.cit.gvsig.fmap.layers.layerOperations.VectorialData; |
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| 82 | import com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor; |
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| 83 | import com.iver.cit.gvsig.fmap.operations.strategies.VisitException; |
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| 84 | import com.iver.cit.gvsig.geoprocess.core.fmap.FeatureFactory; |
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| 85 | import com.iver.cit.gvsig.geoprocess.core.fmap.FeatureProcessor; |
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| 86 | |||
| 87 | /**
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| 88 | * Visits all features of a layer, in context of a
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| 89 | * merge geoprocess, and creates a new feature with the
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| 90 | * attributes equals to ITableDefinition specified
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| 91 | *
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| 92 | * @author azabala
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| 93 | *
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| 94 | */
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| 95 | public class MergeVisitor implements FeatureVisitor { |
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| 96 | |||
| 97 | SelectableDataSource recordset; |
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| 98 | ITableDefinition definition; |
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| 99 | FeatureProcessor featureProcessor; |
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| 100 | |||
| 101 | public MergeVisitor(ITableDefinition schema,
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| 102 | FeatureProcessor processor){
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| 103 | this.definition = schema;
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| 104 | this.featureProcessor = processor;
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| 105 | } |
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| 106 | |||
| 107 | public void visit(IGeometry g, int index) throws VisitException { |
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| 108 | FieldDescription[] fields =
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| 109 | definition.getFieldsDesc(); |
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| 110 | Value[] values = new Value[fields.length]; |
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| 111 | for(int i = 0; i < fields.length; i++){ |
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| 112 | String fieldName = fields[i].getFieldName();
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| 113 | try {
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| 114 | int fieldIndex = recordset.getFieldIndexByName(fieldName);
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| 115 | if(fieldIndex == -1) |
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| 116 | values[i] = ValueFactory.createNullValue(); |
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| 117 | else{
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| 118 | //we must to verify data type, not only field name
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| 119 | int fieldType = fields[i].getFieldType();
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| 120 | int recordsetType = recordset.getFieldType(fieldIndex);
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| 121 | if(fieldType != recordsetType){
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| 122 | values[i] = ValueFactory.createNullValue(); |
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| 123 | }else{
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| 124 | values[i] = recordset.getFieldValue(index, fieldIndex); |
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| 125 | } |
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| 126 | } |
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| 127 | } catch (com.hardcode.gdbms.engine.data.driver.DriverException e) {
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| 128 | throw new VisitException("Error en merge al tratar de leer el atributo de un feature de una de las capas"); |
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| 129 | } |
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| 130 | }//for
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| 131 | IFeature feature = FeatureFactory.createFeature(values, g); |
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| 132 | featureProcessor.processFeature(feature); |
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| 133 | } |
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| 134 | |||
| 135 | public void stop(FLayer layer) { |
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| 136 | featureProcessor.finish(); |
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| 137 | } |
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| 138 | |||
| 139 | public boolean start(FLayer layer) { |
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| 140 | if(layer instanceof VectorialData && layer instanceof AlphanumericData){ |
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| 141 | try {
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| 142 | this.recordset = ((AlphanumericData)layer).getRecordset();
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| 143 | this.featureProcessor.start();
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| 144 | } catch (DriverException e) {
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| 145 | return false; |
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| 146 | } catch (EditionException e) {
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| 147 | return false; |
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| 148 | } |
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| 149 | return true; |
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| 150 | } |
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| 151 | return false; |
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| 152 | } |
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| 153 | |||
| 154 | public String getProcessDescription() { |
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| 155 | return "Merging many layers"; |
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| 156 | } |
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| 157 | |||
| 158 | } |