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gvsig-geoprocess / org.gvsig.geoprocess / trunk / org.gvsig.geoprocess / org.gvsig.geoprocess.algorithm / org.gvsig.geoprocess.algorithm.difference / src / main / java / org / gvsig / geoprocess / algorithm / difference / DifferenceAlgorithm.java @ 245

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/**
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 * gvSIG. Desktop Geographic Information System.
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 *
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 * Copyright (C) 2007-2012 gvSIG Association.
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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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 * For any additional information, do not hesitate to contact us
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 * at info AT gvsig.com, or visit our website www.gvsig.com.
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 */
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package org.gvsig.geoprocess.algorithm.difference;
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import es.unex.sextante.core.Sextante;
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import es.unex.sextante.dataObjects.IVectorLayer;
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import es.unex.sextante.exceptions.GeoAlgorithmExecutionException;
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import es.unex.sextante.exceptions.RepeatedParameterNameException;
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import es.unex.sextante.outputs.OutputVectorLayer;
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import org.gvsig.fmap.dal.exception.DataException;
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import org.gvsig.fmap.dal.feature.FeatureSet;
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import org.gvsig.fmap.dal.feature.FeatureStore;
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import org.gvsig.fmap.dal.feature.FeatureType;
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import org.gvsig.geoprocess.algorithm.base.core.GeometryOperation;
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import org.gvsig.geoprocess.algorithm.base.core.ScalableUnionOperation;
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import org.gvsig.geoprocess.lib.sextante.AbstractSextanteGeoProcess;
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import org.gvsig.geoprocess.lib.sextante.dataObjects.FlyrVectIVectorLayer;
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/**
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 * Difference algorithm
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 * @author <a href="mailto:nachobrodin@gmail.com">Nacho Brodin</a>
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 */
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public class DifferenceAlgorithm extends AbstractSextanteGeoProcess {
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        public static final String  RESULT    = "RESULT";
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        public static final String  LAYER     = "LAYER";
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        public static final String  DIF       = "DIF";
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        public static final String  CHECK     = "CHECK";
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        public void defineCharacteristics(){
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        setName(getTranslation("Difference"));
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        setGroup(getTranslation("basic_vect_algorithms"));
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        // setGeneratesUserDefinedRasterOutput(false);
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                try {
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                        m_Parameters.addInputVectorLayer(LAYER, 
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                getTranslation("Input_layer"),
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                                                                                                IVectorLayer.SHAPE_TYPE_WRONG, 
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                                                                                                true);
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                        m_Parameters.addInputVectorLayer(DIF, 
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                getTranslation("Overlays_layer"),
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                                                                                                IVectorLayer.SHAPE_TYPE_WRONG, 
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                                                                                                true);
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            m_Parameters.addBoolean(CHECK,
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                getTranslation("Selected_geometries"), false);
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                } catch (RepeatedParameterNameException e) {
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                        Sextante.addErrorToLog(e);
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                }
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                addOutputVectorLayer(RESULT,
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 getTranslation("Difference"),
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                                                                OutputVectorLayer.SHAPE_TYPE_UNDEFINED);
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        }
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        /*
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         * (non-Javadoc)
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         * @see es.unex.sextante.core.GeoAlgorithm#processAlgorithm()
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         */
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        public boolean processAlgorithm() throws GeoAlgorithmExecutionException {
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                org.gvsig.fmap.geom.Geometry overlayGeometry = null;
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                IVectorLayer dif = m_Parameters.getParameterValueAsVectorLayer(DIF);
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                IVectorLayer layer = m_Parameters.getParameterValueAsVectorLayer(LAYER);
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                boolean selectedGeom = m_Parameters.getParameter(CHECK).getParameterValueAsBoolean();
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                try {
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                        overlayGeometry = ScalableUnionOperation.joinLayerGeometries(dif);
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                } catch (Exception e) {
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                        Sextante.addErrorToLog(e);
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                        return false;
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                }
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                FeatureStore storeLayer = null;
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                if(layer instanceof FlyrVectIVectorLayer)
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                        storeLayer = ((FlyrVectIVectorLayer)layer).getFeatureStore();
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                else
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                        return false;
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                try {
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                        FeatureSet features = null;
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                        features = storeLayer.getFeatureSet();
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                        FeatureType featureType = features.getDefaultFeatureType();
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            FeatureStore outFeatStore =
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                buildOutPutStore(featureType, layer.getShapeType(),
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                    getTranslation("Difference"), RESULT);
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                        GeometryOperation operation = new DifferenceOperation(overlayGeometry);
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            operation.setTaskStatus(getStatus());
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                        operation.computesGeometryOperation(storeLayer, outFeatStore, attrNames, selectedGeom, true);
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                } catch (DataException e) {
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                        Sextante.addErrorToLog(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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}