Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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.

 *

 */

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

import java.io.File;

import java.util.ArrayList;

import java.util.List;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.exportto.ExporttoService;

import org.gvsig.exportto.ExporttoServiceException;

import org.gvsig.exportto.ExporttoServiceFinishAction;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

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.tools.dispose.DisposableIterator;

import org.gvsig.tools.dispose.DisposeUtils;

import org.gvsig.tools.task.AbstractMonitorableTask;

/**

 * @author gvSIG Team

 * @version $Id$

 * 

 */

public class ExporttoShapeService extends AbstractMonitorableTask implements

    ExporttoService {

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

    private File theShapeFile;

    private IProjection projection;

    private FeatureStore featureStore;

    private int geometryType = -1;

    private NewFeatureStoreParameters newFeatureStoreParameters;

    private FilesystemServerExplorer filesystemServerExplorer;

    private static GeometryManager geoManager = GeometryLocator.getGeometryManager();

    private ExporttoServiceFinishAction exporttoServiceFinishAction;

    public ExporttoShapeService(File shapeFile, FeatureStore featureStore,

        IProjection projection) {

        super("Export to shape");

        this.featureStore = featureStore;

        this.theShapeFile = shapeFile;

        this.projection = projection;

    }

    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");

        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(fileName, newFeatureStoreParameters);

            // 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(fileName, newFeatureStoreParameters);

            // 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(fileName, newFeatureStoreParameters);

        } else {

            // params already initialized

            newFeatureStoreParameters.setDynValue("shpfile", single_file);

            try {

                export(filesystemServerExplorer, newFeatureStoreParameters,

                    featureSet, geometryType, false);

            } catch (ExporttoServiceException ee) {

                throw_exp = ee;

            }

            finishAction(single_file.getName(), newFeatureStoreParameters);

        }

        this.taskStatus.terminate();

        this.taskStatus.remove();

        if (throw_exp != null) {

            throw throw_exp;

        }

    }

    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().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, Geometry.SUBTYPES.GEOM2D);

            } catch (Exception e) {

                throw new ExporttoServiceException(e);

            }

            efad.setGeometryType(gty);

            efad.setPrecision(fad.getPrecision());

            type.setDefaultGeometryAttributeName(fad.getName());

            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 != 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 boolean

                        setNonNulls(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);

        }

    }

    /**

     * @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 ft,

        Feature feat, EditableFeature edit_f) {

        boolean error = false;

        FeatureAttributeDescriptor[] atts = ft.getAttributeDescriptors();

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

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

                Object val = null;

                try {

                    val = feat.get(atts[i].getName());

                    if (val != null) {

                        edit_f.set(

                            atts[i].getName(),

                            feat.get(atts[i].getName()));

                    }

                } 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,

        NewFeatureStoreParameters newFeatureStoreParameters) {

        if (exporttoServiceFinishAction != null) {

            exporttoServiceFinishAction.finished(layerName,

                newFeatureStoreParameters);

        }

    }

    public void setFinishAction(

        ExporttoServiceFinishAction exporttoServiceFinishAction) {

        this.exporttoServiceFinishAction = exporttoServiceFinishAction;

    }

}