Application: gvSIG desktop » gvSIG geoprocess

/*

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2010 Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 */

package org.gvsig.sextante.app.algorithm.dissolve;

import java.util.ArrayList;

import java.util.HashMap;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.dal.feature.FeatureType;

import org.gvsig.sextante.app.extension.core.gvGeoAlgorithm;

import org.gvsig.sextante.app.extension.core.gvVectorLayer;

import es.unex.sextante.additionalInfo.AdditionalInfoNumericalValue;

import es.unex.sextante.core.Sextante;

import es.unex.sextante.dataObjects.IVectorLayer;

import es.unex.sextante.exceptions.GeoAlgorithmExecutionException;

import es.unex.sextante.exceptions.RepeatedParameterNameException;

import es.unex.sextante.exceptions.UnsupportedOutputChannelException;

import es.unex.sextante.outputs.OutputVectorLayer;

/**

 * Dissolve algorithm

 * @author <a href="mailto:nachobrodin@gmail.com">Nacho Brodin</a>

 */

public class DissolveAlgorithm extends gvGeoAlgorithm {

        public static final String        RESULT            = "RESULT";

        public static final String        LAYER             = "LAYER";

        public static final String        FIELD             = "FIELD";

        public static final String        FUNCTIONS         = "FUNCTIONS";

        public static final String        SELECTED_GEOM     = "SELECTED_GEOM";

        public static final String        DISSOLV_ADJ       = "DISSOLV_ADJ";

        public static final String        FUNCTION_LIST     = "FUNCTION_LIST";

        public static final String        Summary[]         = {"Min", "Max", "Sum", "Avg"};

        private boolean                   funcList[]        = new boolean[Summary.length];

        private HashMap<String, String>   funcMap           = new HashMap<String, String>();

        /*

         * (non-Javadoc)

         * @see es.unex.sextante.core.GeoAlgorithm#defineCharacteristics()

         */

        public void defineCharacteristics(){

                setName(Sextante.getText("Dissolve"));

                setGroup(Sextante.getText("gvSIG_Algorithms"));

                setGeneratesUserDefinedRasterOutput(false);

                try {

                        m_Parameters.addInputVectorLayer(LAYER, 

                                                                                                Sextante.getText( "Input_layer"), 

                                                                                                IVectorLayer.SHAPE_TYPE_WRONG, 

                                                                                                true);

                        m_Parameters.addBoolean(SELECTED_GEOM, 

                                                                        Sextante.getText("Selected_geometries"), 

                                                                        false);

                        m_Parameters.addBoolean(DISSOLV_ADJ, 

                                                                        Sextante.getText("Selected_geometries"), 

                                                                        false);

                        m_Parameters.addNumericalValue(FIELD, 

                                                                                        Sextante.getText("Field"),

                                                                                        0,

                                                                                        AdditionalInfoNumericalValue.NUMERICAL_VALUE_INTEGER);

                        m_Parameters.addString(FUNCTION_LIST, Sextante.getText("Function_list"));

                        addOutputVectorLayer(RESULT,

                                                                Sextante.getText( "Dissolve"),

                                                                OutputVectorLayer.SHAPE_TYPE_POLYGON);

                } catch (RepeatedParameterNameException e) {

                        Sextante.addErrorToLog(e);

                }

                setExternalParameters(new DissolveParametersPanel());

        }

        /*

         * (non-Javadoc)

         * @see es.unex.sextante.core.GeoAlgorithm#processAlgorithm()

         */

        public boolean processAlgorithm() throws GeoAlgorithmExecutionException {

                IVectorLayer layer = m_Parameters.getParameterValueAsVectorLayer(LAYER);

                int indexField = m_Parameters.getParameterValueAsInt(FIELD);

                boolean selectedGeom = m_Parameters.getParameterValueAsBoolean(SELECTED_GEOM);

                boolean dissolvAdj = m_Parameters.getParameterValueAsBoolean(DISSOLV_ADJ);

                String functionList = m_Parameters.getParameterValueAsString(FUNCTION_LIST);

                loadSummary(functionList);

                FeatureStore storeLayer = null;

                if(layer instanceof gvVectorLayer)

                        storeLayer = ((gvVectorLayer)layer).getFeatureStore();

                else

                        return false;

                FeatureSet features = null;

                FeatureType featureType = null;

                try {

                        features = storeLayer.getFeatureSet();

                        featureType = features.getDefaultFeatureType();

                } catch (DataException e) {

                        Sextante.addErrorToLog(e);

                        return false;

                }

                FeatureStore outFeatStore = buildDissolvedOutPutStore(featureType, indexField, layer.getShapeType(),

                                                                                                                Sextante.getText("Dissolve"), RESULT);

                IDissolveRule criteria = null;

                if(dissolvAdj)

                        criteria = new AdjacencyDissolveRule(indexField, funcMap);

                else

                        criteria = new DissolveRule(indexField, funcMap);

                try {

                        DissolveOperation op = new DissolveOperation(criteria);

                        op.computesGeometryOperation(storeLayer, outFeatStore, attrNames, selectedGeom, true);

                } catch (DataException e) {

                        Sextante.addErrorToLog(e);

                        return false;

                }

                return true;

        }

        /**

         * Checks if the parameter is in Summary list

         * @param it

         * @return the position in the list

         */

        private int isInList(String it) {

                for (int i = 0; i < Summary.length; i++) {

                        if(Summary[i].compareTo(it) == 0)

                                return i;

                }

                return -1;

        }

        /**

         * Loads the list of functions to use

         * @param functionList

         */

        private void loadSummary(String functionList) {

                String[] attrList = functionList.split(";");

                for (int i = 0; i < attrList.length; i++) {

                        String[] func = attrList[i].split(",");

                        for (int j = 1; j < func.length; j++) {

                                int pos = isInList(func[j]);

                                if(pos != -1) {

                                        funcList[pos] = true;

                                        funcMap.put(Summary[pos], func[0]);

                                }

                        }

                }

        }

        /**

         * Builds the output FeatureStore 

         * @param featureType

         * @return FeatureStore

         */

        @SuppressWarnings("unchecked")

        protected FeatureStore buildDissolvedOutPutStore(FeatureType featureType1,

                                                                                        int indexField,

                                                                                        int shapeType,

                                                                                        String sextanteLayerName, 

                                                                                        String sextanteLayerLabel) {

                ArrayList<Class> typesList = new ArrayList<Class>();

                ArrayList<String> attr = new ArrayList<String>();

                attr.add("FID");

                typesList.add(Integer.class);

                FeatureAttributeDescriptor desc = featureType1.getAttributeDescriptor(indexField);

                attr.add(desc.getName());

                typesList.add(desc.getObjectClass());

                for (int i = 0; i < funcList.length; i++) 

                        if(funcList[i]) {

                                String fieldName = funcMap.get(Summary[i]);

                                if(fieldName.length() >= 6)

                                        fieldName = fieldName.substring(0, 7);

                                attr.add(fieldName + "_" + Summary[i]);

                                typesList.add(Double.class);

                        }

                attrNames = new String[attr.size()];

                attr.toArray(attrNames);

                Class[] types = new Class[typesList.size()];

                typesList.toArray(types);

                try {

                        IVectorLayer output = getNewVectorLayer(sextanteLayerLabel,

                                                                                                        sextanteLayerName,

                                                                                                        shapeType, types, attrNames);

                        return ((gvVectorLayer)output).getFeatureStore();

                } catch (UnsupportedOutputChannelException e) {

                        Sextante.addErrorToLog(e);

                }

                return null;

        }

}