Application: gvSIG desktop » gvSIG geoprocess

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2012 gvSIG Association.

 *

 * 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., 51

 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us at info AT

 * gvsig.com, or visit our website www.gvsig.com.

 */

/*

 * 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.geoprocess.algorithm.buffer;

import java.util.ArrayList;

import java.util.List;

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

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

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

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

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

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.geoprocess.algorithm.base.core.GeometryOperation;

import org.gvsig.geoprocess.algorithm.base.util.GeometryUtil;

import org.gvsig.geoprocess.algorithm.base.util.JTSFacade;

import org.gvsig.geoprocess.lib.sextante.AbstractSextanteGeoProcess;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.vividsolutions.jts.geom.Geometry;

import java.util.Iterator;

/**

 * Fuse operation

 *

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

 */

public class FuseOperation extends GeometryOperation {

    private static Logger logger = LoggerFactory.getLogger(FuseOperation.class.getName());

    private List<Element> featureList = null;

    private String nameIdField = "FID";

    private int iFeat = 0;

    class Element {

        public int id = -1;

        public Feature feat = null;

        public List<Element> overlapList = new ArrayList<Element>();

        public boolean insertedToJoin = false;

        public Geometry jtsGeom = null;

        public void finalize() throws Throwable {

            super.finalize();

            overlapList.clear();

        }

    }

    class NodeTree {

        public Element element = null;

        public int pos = 0;

        public NodeTree parent = null;

        public NodeTree(Element node, NodeTree parent) {

            this.element = node;

            this.parent = parent;

        }

        public Element getNext() {

            if (pos < element.overlapList.size()) {

                return element.overlapList.get(pos++);

            }

            return null;

        }

    }

    public FuseOperation(AbstractSextanteGeoProcess process) {

        super(process);

        featureList = new ArrayList<Element>();

    }

    @Override

    public EditableFeature invoke(org.gvsig.fmap.geom.Geometry g,

            Feature featureInput) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    public void invoke(org.gvsig.fmap.geom.Geometry g,

            EditableFeature featureInput) {

                // TODO Auto-generated method stub

    }

    /**

     * Computes a complete operation over the input FeatureStore. The result of

     * this operation is stored in the output FeatureStore. This method will

     * call once for each geometry.

     *

     * @param inFeatStore Input FeatureStore

     * @param outFeatStore Output FeatureStore

     * @throws DataException

     */

    @SuppressWarnings("deprecation")

    public void computesGeometryOperation(FeatureStore inFeatStore,

            FeatureStore outFeatStore,

            String[] attrNames,

            boolean first) throws DataException {

        if (featureList != null) {

            featureList.clear();

        }

        this.inFeatureStore = inFeatStore;

        FeatureSet featuresSet = inFeatStore.getFeatureSet();

        if (first) {

            setFeatureStore(outFeatStore, attrNames);

        }

        Iterator it = featuresSet.iterator();

        numberOfFeatures = (int) featuresSet.getSize();

        if (status != null) {

            status.setRangeOfValues(0, numberOfFeatures);

        }

        if (process != null) {

            process.setProgress(0, numberOfFeatures);

        }

        //Crear lista de elementos

        int iCount = 0;

        while (it.hasNext() && !process.getTaskMonitor().isCanceled()) {

            Feature feat = (Feature) it.next();

            Element el = new Element();

            el.feat = feat;

            el.id = iCount;

            featureList.add(el);

            if (status != null && process != null) {

                status.setCurValue(iCount);

            }

            if (process != null) {

                process.setProgress(iCount, numberOfFeatures);

            }

            iCount++;

        }

        //it.dispose();

        //Crear listas de solapes para cada feature

        iCount = 0;

        while (iCount < featureList.size() && !process.getTaskMonitor().isCanceled()) {

            Element elem1 = featureList.get(iCount);

            org.gvsig.fmap.geom.Geometry geom1 = elem1.feat.getDefaultGeometry();

            if (status != null) {

                status.setCurValue(iCount);

            }

            if (process != null) {

                process.setProgress(iCount, numberOfFeatures);

            }

            for (int i = iCount + 1; i < featureList.size(); i++) {

                Element elem2 = featureList.get(i);

                org.gvsig.fmap.geom.Geometry geom2 = elem2.feat.getDefaultGeometry();

                if (areBBoxesOverlaping(geom1, geom2)) {

                    if (elem1.jtsGeom == null) {

                        elem1.jtsGeom = GeometryUtil.geomToJTS(geom1);

                    }

                    elem2.jtsGeom = GeometryUtil.geomToJTS(geom2);

                    if (elem1.jtsGeom.intersects(elem2.jtsGeom)) {

                        elem1.overlapList.add(elem2);

                        elem2.overlapList.add(elem1);

                    }

                }

            }

            iCount++;

        }

        iCount = 0;

        while (iCount < featureList.size() && !process.getTaskMonitor().isCanceled()) {

            Element elem1 = featureList.get(iCount);

            if (status != null) {

                status.setCurValue(iCount);

            }

            if (process != null) {

                process.setProgress(iCount, numberOfFeatures);

            }

            if (!elem1.insertedToJoin) {

                buildListToJoin(elem1);

            }

            iCount++;

        }

    }

    public void end() {

        if (persister != null) {

            persister.end();

        }

    }

    private boolean areBBoxesOverlaping(org.gvsig.fmap.geom.Geometry g1, org.gvsig.fmap.geom.Geometry g2) {

        if (g1.getEnvelope().getMaximum(0) < g2.getEnvelope().getMinimum(0)) {

            return false;

        }

        if (g1.getEnvelope().getMinimum(0) > g2.getEnvelope().getMaximum(0)) {

            return false;

        }

        if (g1.getEnvelope().getMaximum(1) < g2.getEnvelope().getMinimum(1)) {

            return false;

        }

        if (g1.getEnvelope().getMinimum(1) > g2.getEnvelope().getMaximum(1)) {

            return false;

        }

        return true;

    }

    private Geometry computesUnion(List<Geometry> listResult) {

        Geometry newGeom = null;

        int iCount = 0;

        int max = listResult.size();

        if (process != null) {

            process.setName("Generating union");

        }

        while (listResult.size() > 1) {

            List<Geometry> list = new ArrayList<Geometry>();

            if (status != null) {

                status.setCurValue(iCount);

            }

            if (process != null) {

                process.setProgress(iCount, max);

            }

            for (int i = 0; i < listResult.size(); i = i + 2) {

                if (i == (listResult.size() - 1)) {

                    list.add(listResult.get(i));

                } else {

                    newGeom = JTSFacade.union(listResult.get(i), listResult.get(i + 1));

                    list.add(newGeom);

                }

            }

            listResult = list;

        }

        return newGeom;

    }

    /**

     * Builds the union of all lists

     *

     * @param listResult

     * @param listToJoin

     */

    private void buildListToJoin(Element elem) {

        Geometry newGeom = null;

        if (elem.overlapList.size() == 0) {

            if (!elem.insertedToJoin) {

                elem.insertedToJoin = true;

            }

            try {

                addFeatureToOutput(elem.feat.getDefaultGeometry(), elem.feat);

            } catch (DataException e) {

                logger.info("Imposible insertar en la tabla", e);

            } catch (CreateGeometryException e) {

                logger.info("Error a?adiendo geometr?a", e);

            }

        } else {

            List<Geometry> listResult = new ArrayList<Geometry>();

            NodeTree subtree = new NodeTree(elem, null);

                        //Hacemos un recorrido en profundidad del ?rbol para a?adir

            //todos los elementos a la lista de geometrias a unir sin

            //repetir ninguna.

            while (subtree != null) {

                if (!subtree.element.insertedToJoin) {

                    listResult.add(subtree.element.jtsGeom);

                    subtree.element.insertedToJoin = true;

                }

                boolean back = false;

                Element l = subtree.getNext();

                if (l == null) {

                    back = true;

                }

                while (!back && l.insertedToJoin) {

                    l = subtree.getNext();

                    if (l == null) {

                        back = true;

                    }

                }

                if (back) {

                    subtree = subtree.parent;

                    continue;

                }

                subtree = new NodeTree(l, subtree);

            }

            newGeom = computesUnion(listResult);

            try {

                addFeatureToOutput(newGeom, elem.feat);

            } catch (DataException e) {

                logger.info("Imposible insertar en la tabla", e);

            } catch (CreateGeometryException e) {

                logger.info("Error a?adiendo geometr?a", e);

            }

        }

    }

    /**

     * Adds a feature to the output

     *

     * @param newGeom

     * @param feat

     * @param newFeatID

     * @throws DataException

     * @throws CreateGeometryException

     */

    private void addFeatureToOutput(org.gvsig.fmap.geom.Geometry newGeom,

            Feature feat) throws DataException, CreateGeometryException {

        String[] fieldNames = persister.getFieldNamesWithoutGeom();

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

        ArrayList<Object> values = new ArrayList<Object>();

        fields.add(nameIdField);

        values.add(iFeat);

        for (int j = 0; j < fieldNames.length; j++) {

            Object obj = feat.get(fieldNames[j]);

            if (obj != null && fieldNames[j].compareTo(nameIdField) != 0) {

                fields.add(fieldNames[j]);

                values.add(obj);

            }

        }

        lastEditFeature = persister.addFeature(newGeom, fields, values);

        iFeat++;

    }

    /**

     * Adds a feature to the output

     *

     * @param newGeom

     * @param feat

     * @param newFeatID

     * @throws DataException

     * @throws CreateGeometryException

     */

    private void addFeatureToOutput(Geometry newGeom,

            Feature feat) throws DataException, CreateGeometryException {

        String[] fieldNames = persister.getFieldNamesWithoutGeom();

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

        ArrayList<Object> values = new ArrayList<Object>();

        fields.add(nameIdField);

        values.add(iFeat);

        for (int j = 0; j < fieldNames.length; j++) {

            Object obj = feat.get(fieldNames[j]);

            if (obj != null && fieldNames[j].compareTo(nameIdField) != 0) {

                fields.add(fieldNames[j]);

                values.add(obj);

            }

        }

        lastEditFeature = persister.addFeature(newGeom, fields, values);

        iFeat++;

    }

}