svn-gvsig-desktop / trunk / extensions / extGeoProcessing / src / com / iver / cit / gvsig / geoprocess / impl / merge / fmap / MergeVisitor.java @ 10626
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/*
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* Created on 05-mar-2006
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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: MergeVisitor.java 10626 2007-03-06 16:55:54Z caballero $
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* $Log$
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* Revision 1.2 2007-03-06 16:47:58 caballero
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* Exceptions
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*
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* Revision 1.1 2006/06/20 18:20:45 azabala
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* first version in cvs
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*
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* Revision 1.2 2006/06/02 18:21:28 azabala
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* *** empty log message ***
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*
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* Revision 1.1 2006/05/24 21:10:15 azabala
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* primera version en cvs despues de refactoring orientado a crear un framework extensible de geoprocessing
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*
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* Revision 1.5 2006/03/23 21:05:11 azabala
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* *** empty log message ***
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*
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* Revision 1.4 2006/03/17 19:53:34 azabala
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* *** empty log message ***
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*
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* Revision 1.3 2006/03/14 18:32:46 fjp
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* Cambio con LayerDefinition para que sea compatible con la definici?n de tablas tambi?n.
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*
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* Revision 1.2 2006/03/07 21:01:33 azabala
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* *** empty log message ***
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*
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* Revision 1.1 2006/03/05 19:59:16 azabala
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* *** empty log message ***
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*
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*
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*/
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package com.iver.cit.gvsig.geoprocess.impl.merge.fmap; |
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import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.hardcode.gdbms.engine.values.ValueFactory; |
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import com.iver.cit.gvsig.exceptions.visitors.ProcessVisitorException; |
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import com.iver.cit.gvsig.exceptions.visitors.StartVisitorException; |
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import com.iver.cit.gvsig.exceptions.visitors.VisitorException; |
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import com.iver.cit.gvsig.fmap.core.IFeature; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.drivers.FieldDescription; |
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import com.iver.cit.gvsig.fmap.drivers.ITableDefinition; |
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import com.iver.cit.gvsig.fmap.layers.FLayer; |
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import com.iver.cit.gvsig.fmap.layers.SelectableDataSource; |
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import com.iver.cit.gvsig.fmap.layers.layerOperations.AlphanumericData; |
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import com.iver.cit.gvsig.fmap.layers.layerOperations.VectorialData; |
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import com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor; |
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import com.iver.cit.gvsig.geoprocess.core.fmap.FeatureFactory; |
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import com.iver.cit.gvsig.geoprocess.core.fmap.FeatureProcessor; |
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/**
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* Visits all features of a layer, in context of a
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* merge geoprocess, and creates a new feature with the
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* attributes equals to ITableDefinition specified
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*
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* @author azabala
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*
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*/
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public class MergeVisitor implements FeatureVisitor { |
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SelectableDataSource recordset; |
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ITableDefinition definition; |
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FeatureProcessor featureProcessor; |
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public MergeVisitor(ITableDefinition schema,
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FeatureProcessor processor){
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this.definition = schema;
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this.featureProcessor = processor;
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} |
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public void visit(IGeometry g, int index) throws VisitorException, ProcessVisitorException { |
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if(g == null) |
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return;
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FieldDescription[] fields =
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definition.getFieldsDesc(); |
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Value[] values = new Value[fields.length]; |
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for(int i = 0; i < fields.length; i++){ |
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String fieldName = fields[i].getFieldName();
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try {
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int fieldIndex = recordset.getFieldIndexByName(fieldName);
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if(fieldIndex == -1) |
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values[i] = ValueFactory.createNullValue(); |
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else{
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//we must to verify data type, not only field name
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int fieldType = fields[i].getFieldType();
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int recordsetType = recordset.getFieldType(fieldIndex);
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if(fieldType != recordsetType){
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values[i] = ValueFactory.createNullValue(); |
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}else{
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values[i] = recordset.getFieldValue(index, fieldIndex); |
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} |
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} |
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} catch (ReadDriverException e) {
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throw new ProcessVisitorException(recordset.getName(),e,"Error en merge al tratar de leer el atributo de un feature de una de las capas"); |
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} |
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}//for
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IFeature feature = FeatureFactory.createFeature(values, g); |
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featureProcessor.processFeature(feature); |
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} |
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public void stop(FLayer layer) throws VisitorException { |
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featureProcessor.finish(); |
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} |
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public boolean start(FLayer layer) throws StartVisitorException { |
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if(layer instanceof VectorialData && layer instanceof AlphanumericData){ |
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try {
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this.recordset = ((AlphanumericData)layer).getRecordset();
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this.featureProcessor.start();
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} catch (ReadDriverException e) {
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return false; |
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} |
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return true; |
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} |
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return false; |
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} |
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public String getProcessDescription() { |
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return "Merging many layers"; |
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} |
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} |
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