Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 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 3

 * 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.

 */

package org.gvsig.exportto.swing.prov.shape;

import java.io.File;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import javax.swing.JOptionPane;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.gvsig.exportto.ExporttoService;

import org.gvsig.exportto.ExporttoServiceException;

import org.gvsig.exportto.ExporttoServiceFinishAction;

import org.gvsig.exportto.swing.prov.file.panel.SelectFileOptionPanel;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

import org.gvsig.fmap.dal.DataStoreParameters;

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

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

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

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

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

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

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

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

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.fmap.dal.feature.NewFeatureStoreParameters;

import org.gvsig.fmap.dal.serverexplorer.filesystem.FilesystemServerExplorer;

import org.gvsig.fmap.dal.serverexplorer.filesystem.FilesystemServerExplorerParameters;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.aggregate.Aggregate;

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

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.fmap.geom.primitive.Curve;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.fmap.geom.primitive.Surface;

import org.gvsig.fmap.geom.type.GeometryType;

import org.gvsig.i18n.Messages;

import org.gvsig.tools.dispose.DisposableIterator;

import org.gvsig.tools.dispose.DisposeUtils;

import org.gvsig.tools.task.AbstractMonitorableTask;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * @author gvSIG Team

 * @version $Id$

 * 

 */

public class ExporttoShapeService extends AbstractMonitorableTask implements

    ExporttoService {

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

    public static final int MAX_FIELD_NAME_LENGTH = 10;

    private File theShapeFile;

    private IProjection projection;

    private FeatureStore featureStore;

    private Map<String, String> origNameToDbfName;

    private int geometryType = -1;

    private NewFeatureStoreParameters newFeatureStoreParameters;

    private FilesystemServerExplorer filesystemServerExplorer;

    private SelectFileOptionPanel filePanel = null;

    private static GeometryManager geoManager = GeometryLocator.getGeometryManager();

    private ExporttoServiceFinishAction exporttoServiceFinishAction;

    public ExporttoShapeService(

                    SelectFileOptionPanel fPanel,

                    FeatureStore featureStore,

                    IProjection projection) {

        super("Export to shape");

        this.featureStore = featureStore;

        this.filePanel = fPanel;

        this.theShapeFile = fPanel.getSelectedFile();

        this.projection = projection;

        try {

                        origNameToDbfName = getNames(featureStore.getDefaultFeatureType());

                } catch (DataException e) {

                        logger.error("While getting def feat type.", e);

                }

    }

    private Map<String, String> getNames(FeatureType ft) {

            Map<String, String> resp = new HashMap<String, String>();

            FeatureAttributeDescriptor[] atts = ft.getAttributeDescriptors();

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

                    if (atts[i].getName().length() > MAX_FIELD_NAME_LENGTH) {

                            String new_name = getNewName(atts[i].getName(), resp.values());

                            resp.put(atts[i].getName(), new_name);

                    }

            }

                return resp;

        }

        private String getNewName(String name, Collection<String> values) {

                int len = name.length(); 

                if (len <= MAX_FIELD_NAME_LENGTH) {

                        /*

                         * Should not happen

                         */

                        return name;

                }

                /*

                 * Composes a new name with start and end of old name and an index

                 * THISISAVERYLONGNAME => THISI_AME_1, THISI_AME_2 ... THISI_AME_9

                 */

                /*

                String pref = name.substring(0, 6) + "_" + name.substring(len - 2) + "_";

                String resp = null;

                for (int i=0; i<10; i++) {

                        resp = pref + i;

                        if (!values.contains(resp)) {

                                return resp;

                        }

                }

                */

                /*

                 * Very strange to get here...

                 * THISISAVERYLONGNAME => THISISA_1, THISISA_2 ... THISISA_999

                 */

                /*

                pref = name.substring(0, 7) + "_";

                for (int i=0; i<1000; i++) {

                        resp = pref + i;

                        if (!values.contains(resp)) {

                                return resp;

                        }

                }

                */

                /*

                 * GDAL field name truncation method (extended from 100 to 255)

                 * THISISAVERYLONGNAME => THISISAVER, THISISAV_1 ... THISISAV_9,

                 * THISISAV10 ... THISISAV99, THISISA100 ... THISISA255

                 * (255 = max number of fields in a SHP)

                 */

                String resp = null;

                for (int i=0; i<255; i++) {

                    if (i==0)

                            resp = name.substring(0, 10);

                    else if (i<=9)

                        resp = name.substring(0, 8) + "_" + i;

                    else if (i<=99)

                            resp = name.substring(0, 8) + i;

                    else

                            resp = name.substring(0, 7) + i;

                    if (!values.contains(resp))

                        return resp;

                }

                /*

                 * Should not get here

                 */

                return name.substring(0, 4) + "_" + (System.currentTimeMillis() % 1000000);

        }

        public void export(FeatureSet featureSet) throws ExporttoServiceException {

        ExporttoServiceException throw_exp = null;

        File item_shp = null;

        String pathFile = theShapeFile.getAbsolutePath();

        String withoutShp = pathFile.replaceAll("\\.shp", "");

        File single_file = new File(withoutShp + ".shp");

        String layer_name = single_file.getName();

        int lastp = layer_name.lastIndexOf(".shp");

        if (lastp > -1) {

            layer_name = layer_name.substring(0, lastp);

        }

        initializeParams(featureSet, single_file);

        if (geometryType == Geometry.TYPES.GEOMETRY) {

            // POINT

            String fileName = withoutShp + "_point" + ".shp";

            item_shp = new File(fileName);

            initializeParams(featureSet, item_shp);

            newFeatureStoreParameters.setDynValue("shpfile", item_shp);

            taskStatus.setTittle("Exporting points");

            try {

                export(filesystemServerExplorer, newFeatureStoreParameters,

                    featureSet, Geometry.TYPES.POINT, true);

            } catch (ExporttoServiceException ee) {

                throw_exp = ee;

            }

            finishAction(layer_name + " (point)", item_shp, projection);

            // CURVE

            fileName = withoutShp + "_curve" + ".shp";

            item_shp = new File(fileName);

            initializeParams(featureSet, item_shp);

            newFeatureStoreParameters.setDynValue("shpfile", item_shp);

            taskStatus.setTittle("Exporting curves");

            try {

                export(filesystemServerExplorer, newFeatureStoreParameters,

                    featureSet, Geometry.TYPES.CURVE, true);

            } catch (ExporttoServiceException ee) {

                throw_exp = ee;

            }

            finishAction(layer_name + " (curve)", item_shp, projection);

            // SURFACE

            fileName = withoutShp + "_surface" + ".shp";

            item_shp = new File(fileName);

            initializeParams(featureSet, item_shp);

            newFeatureStoreParameters.setDynValue("shpfile", item_shp);

            taskStatus.setTittle("Exporting surfaces");

            try {

                export(filesystemServerExplorer, newFeatureStoreParameters,

                    featureSet, Geometry.TYPES.SURFACE, true);

            } catch (ExporttoServiceException ee) {

                throw_exp = ee;

            }

            finishAction(layer_name + " (surface)", item_shp, projection);

        } else {

            // params already initialized

            newFeatureStoreParameters.setDynValue("shpfile", single_file);

            try {

                export(filesystemServerExplorer, newFeatureStoreParameters,

                    featureSet, geometryType, false);

            } catch (ExporttoServiceException ee) {

                throw_exp = ee;

            }

            finishAction(layer_name, single_file, projection);

        }

        this.taskStatus.terminate();

        this.taskStatus.remove();

        if (throw_exp != null) {

            throw throw_exp;

        } else {

                if (origNameToDbfName.size() > 0) {

                        showNewNamesDialog(origNameToDbfName);

                }

        }

    }

    private void showNewNamesDialog(Map<String, String> map) {

            Iterator<String> iter = map.keySet().iterator();

            String msg = Messages.getText("_Some_field_names_too_long_automatically_changed");

            msg = msg + ":\n";

            String k, v;

            while (iter.hasNext()) {

                    k = iter.next();

                    v = map.get(k);

                    msg = msg + "\n" + k + " > " + v;

            }

            JOptionPane.showMessageDialog(

                            this.filePanel,

                            msg,

                            Messages.getText("export_progress"),

                            JOptionPane.WARNING_MESSAGE);

        }

        private void initializeParams(

        FeatureSet featureSet, File out_shp_file)

        throws ExporttoServiceException {

        DataManager dataManager = DALLocator.getDataManager();

        FilesystemServerExplorerParameters explorerParams;

        try {

            explorerParams =

                (FilesystemServerExplorerParameters) dataManager

                    .createServerExplorerParameters(FilesystemServerExplorer.NAME);

        } catch (InitializeException e) {

            throw new ExporttoServiceException(e);

        } catch (ProviderNotRegisteredException e) {

            throw new ExporttoServiceException(e);

        }

        explorerParams.setRoot(out_shp_file.getParent());

        try {

            filesystemServerExplorer =

                (FilesystemServerExplorer) dataManager.openServerExplorer(

                    "FilesystemExplorer", explorerParams);

        } catch (ValidateDataParametersException e) {

            throw new ExporttoServiceException(e);

        } catch (InitializeException e) {

            throw new ExporttoServiceException(e);

        } catch (ProviderNotRegisteredException e) {

            throw new ExporttoServiceException(e);

        }

        try {

            newFeatureStoreParameters =

                (NewFeatureStoreParameters) filesystemServerExplorer

                    .getAddParameters(out_shp_file);

        } catch (DataException e) {

            throw new ExporttoServiceException(e);

        }

        newFeatureStoreParameters.setDynValue("CRS", projection);

        geometryType =

            featureSet.getDefaultFeatureType().getDefaultGeometryAttribute()

                .getGeomType().getType();

    }

    private void export(FilesystemServerExplorer explorer,

        NewFeatureStoreParameters params, FeatureSet featureSet,

        int geometryType, boolean checkType) throws ExporttoServiceException {

        String providerName = params.getDataStoreName();

        String explorerName = explorer.getProviderName();

        boolean there_was_error = false;

        DisposableIterator it = null;

        try {

            EditableFeatureType type =

                featureStore.getDefaultFeatureType().getCopy().getEditable();

            FeatureAttributeDescriptor fad =

                (FeatureAttributeDescriptor) type.get(type

                    .getDefaultGeometryAttributeName());

            type.remove(fad.getName());

            EditableFeatureAttributeDescriptor efad =

                type.add(fad.getName(), fad.getType(), fad.getSize());

            efad.setDefaultValue(fad.getDefaultValue());

            GeometryType gty = null;

            try {

                    gty = geoManager.getGeometryType(geometryType, fad.getGeomType().getSubType());

            } catch (Exception e) {

                throw new ExporttoServiceException(e);

            }

            efad.setGeometryType(gty);

            efad.setPrecision(fad.getPrecision());

            type.setDefaultGeometryAttributeName(fad.getName());

            // ==========================

            fixNames(type);

            // ==========================

            params.setDefaultFeatureType(type);

            params.setDynValue("geometryType", null);

            DataManager manager = DALLocator.getDataManager();

            manager.newStore(explorerName, providerName, params, true);

            FeatureStore target =

                (FeatureStore) manager.openStore(providerName, params);

            FeatureType targetType = target.getDefaultFeatureType();

            taskStatus.setRangeOfValues(0, featureSet.getSize());

            target.edit(FeatureStore.MODE_APPEND);

            it = featureSet.fastIterator();

            int featureCount = 0;

            // ================================================

            // Reprojection stuff

            Geometry reproj_geom = null;

            EditableFeature edit_feat = null;

            IProjection sourceProjection =

                featureStore.getDefaultFeatureType().getDefaultGeometryAttribute().getSRS();

            ICoordTrans coord_trans = null;

            // this comparison is perhaps too preventive

            // we could  have two instances of same projection

            // so we would do more computations than needed

            if (sourceProjection != null && sourceProjection != this.projection) {

                coord_trans = sourceProjection.getCT(this.projection); 

            }

            // ================================================

            List<Geometry> extracted = null;

            Geometry gitem = null;

            while (it.hasNext()) {

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

                gitem = feature.getDefaultGeometry();

                if (checkType) {

                    extracted = getGeometriesFrom(gitem, geometryType);

                    if (extracted.size() == 0) {

                        // found no geometries of correct type

                        continue;

                    } else {

                        if (geometryType != Geometry.TYPES.POINT) {

                            // If not points, merge geometries

                            // (curves or surfaces)

                            try {

                                gitem = union(extracted);

                                extracted = new ArrayList<Geometry>();

                                extracted.add(gitem);

                            } catch (Exception ex) {

                                there_was_error = true;

                                logger.info("Error in union.", ex);

                            }

                        } else {

                            // only in the case of points, we can have several

                            // geometries if source is multipoint

                        }

                    }

                } else {

                    extracted = new ArrayList<Geometry>();

                    extracted.add(gitem);

                }

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

                    gitem = extracted.get(i);

                    //gitem = force2D(gitem, geometryType);

                    edit_feat = target.createNewFeature(true);

                    there_was_error = there_was_error |

                                    /*

                                     * Accumulate error in boolean.

                                     * This also fixes field names (using origNameToDbfName)

                                     */

                                    setNonNulls(featureStore.getDefaultFeatureType(),

                                                    targetType, feature, edit_feat);

                    edit_feat.setDefaultGeometry(gitem);

                    // ================================================

                    // Reprojection stuff

                    if (coord_trans != null) {

                        reproj_geom = edit_feat.getDefaultGeometry();

                        reproj_geom = reproj_geom.cloneGeometry();

                        reproj_geom.reProject(coord_trans);

                        edit_feat.setDefaultGeometry(reproj_geom);

                    }

                    // ================================================

                    target.insert(edit_feat);

                }

                featureCount++;

                this.taskStatus.setCurValue(featureCount);

                if (this.taskStatus.isCancellationRequested()) {

                    return;

                }

            }

            target.finishEditing();

            target.dispose();

        } catch (Exception e) {

            throw new ExporttoServiceException(e);

        } finally {

            DisposeUtils.dispose(it);

        }

        if (there_was_error) {

            Exception cause = new Exception(

                "_Issues_with_attributes_or_geometries");

            throw new ExporttoServiceException(cause);

        }

    }

    private void fixNames(EditableFeatureType eft) {

            FeatureAttributeDescriptor[] atts = eft.getAttributeDescriptors();

            EditableFeatureAttributeDescriptor efad = null;

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

                    String new_name = origNameToDbfName.get(atts[i].getName()); 

                    if (new_name != null) {

                            eft.remove(atts[i].getName());

                            efad = eft.add(new_name, atts[i].getType(), atts[i].getSize());

                            efad.setPrecision(atts[i].getPrecision());

                    }

            }

        }

        /**

     * @param gitem

     * @param geometryType2

     * @return

     */

    private Geometry force2D(Geometry ge, int gt) throws CreateGeometryException {

        if (ge.getGeometryType().getSubType() == Geometry.SUBTYPES.GEOM2D) {

            return ge;

        } else {

            switch (gt) {

            case Geometry.TYPES.POINT:

                Point p = (Point) ge;

                return geoManager.createPoint(

                    p.getX(), p.getY(),

                    Geometry.SUBTYPES.GEOM2D);

            case Geometry.TYPES.CURVE:

                return geoManager.createCurve(ge.getGeneralPath(), Geometry.SUBTYPES.GEOM2D);

            case Geometry.TYPES.SURFACE:

                return geoManager.createSurface(ge.getGeneralPath(), Geometry.SUBTYPES.GEOM2D);

            default:

                return ge;

            }

        }

    }

    /**

     * @param feature

     * @param edit_feat

     */

    private boolean setNonNulls(

        FeatureType src_ft, FeatureType target_ft,

        Feature feat, EditableFeature edit_f) {

        boolean error = false;

        FeatureAttributeDescriptor[] atts = src_ft.getAttributeDescriptors();

        String orig_name = null;

        String dbf_name = null;

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

            if (atts[i].getType() != org.gvsig.fmap.geom.DataTypes.GEOMETRY) {

                Object val = null;

                try {

                        orig_name = atts[i].getName();

                        dbf_name = origNameToDbfName.get(orig_name);

                        if (dbf_name == null) {

                                dbf_name = orig_name; 

                        }

                    val = feat.get(orig_name);

                    if (val != null) {

                        edit_f.set(dbf_name, val);

                    }

                } catch (Exception ex) {

                    logger.info("Error while getting/setting value", ex);

                    error = true;

                }

            }

        }

        return error;

    }

    private Geometry union(List<Geometry> geoms)

        throws GeometryOperationNotSupportedException, GeometryOperationException {

        if (geoms == null || geoms.size() == 0) {

            return null;

        }

        if (geoms.size() == 1) {

            return geoms.get(0);

        }

        Geometry resp = geoms.get(0);

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

            resp = resp.union(geoms.get(i));

        }

        return resp;

    }

    /**

     * @param feat_geom_type

     * @param type must be POINT, LINE or POLYGON (Geometry.TYPES)

     * @return

     */

    private List<Geometry> getGeometriesFrom(Geometry in_geom, int type) {

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

        Aggregate agg = null;

        /*

         * If input geometry is aggregate, search its

         * primitives

         */

        if (in_geom instanceof Aggregate) {

            agg = (Aggregate) in_geom;

            Geometry item = null;

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

            for (int i=0; i<agg.getPrimitivesNumber(); i++) {

                item = agg.getPrimitiveAt(i);

                add_parts = getGeometriesFrom(item, type);

                resp.addAll(add_parts);

            }

            return resp;

        }

        // ============================================

        switch (type) {

        case Geometry.TYPES.POINT:

            if (in_geom instanceof Point) {

                resp.add(in_geom);

            }

            // =======================================================

            break;

        case Geometry.TYPES.CURVE:

            if (in_geom instanceof Curve) {

                resp.add(in_geom);

            }

            // =======================================================

            break;

        case Geometry.TYPES.SURFACE:

            if (in_geom instanceof Surface) {

                resp.add(in_geom);

            }

            // =======================================================

            break;

        }

        return resp;

    }

    private void finishAction(String layerName, File shp_file, IProjection proj)

    throws ExporttoServiceException {

        if (exporttoServiceFinishAction != null) {

            /*

             * Export is done. We notify with a SHPStoreParameters,

             * not with the NewSHPParameters we have used:

             */

                DataStoreParameters shp_params = null;

            try {

                    shp_params = DALLocator.getDataManager().createStoreParameters("Shape");

                    shp_params.setDynValue("shpfile", shp_file);

                    shp_params.setDynValue("CRS", proj);

                shp_params.validate();

            } catch (Exception e) {

                throw new ExporttoServiceException(e);

            }

            exporttoServiceFinishAction.finished(layerName, shp_params);

        }

    }

    public void setFinishAction(

        ExporttoServiceFinishAction exporttoServiceFinishAction) {

        this.exporttoServiceFinishAction = exporttoServiceFinishAction;

    }

}