Application: gvSIG desktop

package org.gvsig.fmap.dal.store.h2.operations;

import java.sql.Connection;

import java.sql.ResultSet;

import java.sql.ResultSetMetaData;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.dal.DataTypes;

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

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

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

import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper;

import org.gvsig.fmap.dal.store.jdbc2.JDBCUtils;

import org.gvsig.fmap.dal.store.jdbc2.OperationsFactory.TableReference;

import org.gvsig.fmap.dal.store.jdbc2.spi.SRSSolver;

import org.gvsig.fmap.dal.store.jdbc2.spi.operations.FetchFeatureTypeOperation;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

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

@SuppressWarnings("UseSpecificCatch")

public class H2SpatialFetchFeatureTypeOperation extends FetchFeatureTypeOperation {

    private static Map<String,GeometryType>h2spatialGeometryTypes = null;

    private Map<String,GeometryColumnInfo> geometry_column;

    private static class GeometryColumnInfo {

        public String columnName;

        public int geometryType;

        public String geometryTypeName;

        public int dimensions;

        public int srid;

        public GeometryColumnInfo(String columnName, int geometryType, String geometryTypeName, int dimensions, int srid) {

            this.columnName = columnName;

            this.geometryType = geometryType;

            this.geometryTypeName = geometryTypeName;

            this.dimensions = dimensions;

            this.srid = srid;

        }

    }

    public H2SpatialFetchFeatureTypeOperation(

            JDBCHelper helper

        ) {

        super(helper);

    }

    private GeometryType getGT(

            GeometryManager manager, 

            int type, 

            int subtype

        ) {

        try {

            return manager.getGeometryType(type, subtype);

        } catch (Exception ex) {

            return null;

        }

    }

    public H2SpatialFetchFeatureTypeOperation(

            JDBCHelper helper,

            EditableFeatureType featureType,

            TableReference table,

            List<String> primaryKeys,

            String defaultGeometryColumn,

            IProjection crs

        ) {

        super(helper, featureType, table, primaryKeys, defaultGeometryColumn, crs);

    }            

    @Override

    public void fetch(EditableFeatureType featureType, Connection conn, TableReference table, List<String> pks, String defaultGeometryColumn, IProjection crs) throws DataException {

        geometry_column = new HashMap<>();

        try {

            //

            // https://github.com/orbisgis/h2gis/wiki/1.-Spatial-data#geometry-columns-view

            //

            StringBuilder where = null;

            if( table.hasDatabase() ) {

                if( where == null ) {

                    where = new StringBuilder();

                } else {

                    where.append(" AND ");

                }

                where.append("UPPER(F_TABLE_CATALOG) = '");

                where.append(table.getDatabase().toUpperCase());

                where.append("'");

            }

            if( table.hasSchema()) {

                if( where == null ) {

                    where = new StringBuilder();

                } else {

                    where.append(" AND ");

                }

                where.append("UPPER(F_TABLE_SCHEMA) = '");

                where.append(table.getSchema().toUpperCase());

                where.append("'");

            }

            if( table.hasTable()) {

                if( where == null ) {

                    where = new StringBuilder();

                } else {

                    where.append(" AND ");

                }

                where.append("UPPER(F_TABLE_NAME) = '");

                where.append(table.getTable().toUpperCase());

                where.append("'");

            }            

            String sql = "SELECT F_GEOMETRY_COLUMN, GEOMETRY_TYPE, COORD_DIMENSION, SRID, TYPE FROM GEOMETRY_COLUMNS WHERE " + where;

            Statement st = this.getConnection().createStatement();

            ResultSet rs = JDBCUtils.executeQuery(st,sql);

            while( rs.next() ) {

                geometry_column.put(

                    rs.getString("F_GEOMETRY_COLUMN"), 

                    new GeometryColumnInfo(

                        rs.getString("F_GEOMETRY_COLUMN"), 

                        rs.getInt("GEOMETRY_TYPE"), 

                        rs.getString("TYPE"), 

                        rs.getInt("COORD_DIMENSION"), 

                        rs.getInt("SRID")

                    )

                );

            }

        } catch (SQLException ex) {

            LOGGER.warn("Can't read metadata from table '"+table+"'.",ex);

        }

        super.fetch(featureType, conn, table, pks, defaultGeometryColumn, crs);

    }

    @Override

    protected void fetchGeometryTypeAndSRS(

            EditableFeatureAttributeDescriptor attr,

            ResultSetMetaData rsMetadata,

            int colIndex

        ) {

        try {

            if( attr.getType()==DataTypes.GEOMETRY ) {

                GeometryColumnInfo column_info = this.geometry_column.get(attr.getName());

                String type = "GEOMETRY";

                if( column_info!=null ) {

                    // H2GIS solo soporte 2D y 3D no soporta Ms

                    if( column_info.dimensions==3 ) {

                        type = column_info.geometryTypeName+"Z";

                    } else {

                        type = column_info.geometryTypeName;

                    }

                    SRSSolver solver = this.helper.getSRSSolver();

                    attr.setSRS(

                        solver.getProjection(getConnection(), column_info.srid)

                    );

                }

                GeometryType gt = getGeometryTypeFromH2SpatialType(type);

                if( gt != null ) {

                    attr.setGeometryType(gt);

                }

            }

        } catch(Exception ex) {

            throw new RuntimeException("Can't fetch geometry type and SRS.", ex);

        }

    }

    private GeometryType getGeometryTypeFromH2SpatialType(String typeName) {

        if( h2spatialGeometryTypes==null ) {

            //

            // https://github.com/orbisgis/h2gis/wiki/1.-Spatial-data#geometry-columns-view

            //

            GeometryManager manager = GeometryLocator.getGeometryManager();

            h2spatialGeometryTypes = new HashMap<>();

            h2spatialGeometryTypes.put("POINT", getGT(manager, Geometry.TYPES.POINT,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("POINTZ", getGT(manager, Geometry.TYPES.POINT,Geometry.SUBTYPES.GEOM3D));

            h2spatialGeometryTypes.put("LINESTRING", getGT(manager, Geometry.TYPES.LINE,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("LINESTRINGZ", getGT(manager, Geometry.TYPES.LINE,Geometry.SUBTYPES.GEOM3D));

            h2spatialGeometryTypes.put("POLYGON", getGT(manager, Geometry.TYPES.POLYGON,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("POLYGONZ", getGT(manager, Geometry.TYPES.POLYGON,Geometry.SUBTYPES.GEOM3D));

            h2spatialGeometryTypes.put("MULTIPOINT", getGT(manager, Geometry.TYPES.MULTIPOINT,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("MULTIPOINTZ", getGT(manager, Geometry.TYPES.MULTIPOINT,Geometry.SUBTYPES.GEOM3D));

            h2spatialGeometryTypes.put("MULTILINESTRING", getGT(manager, Geometry.TYPES.MULTILINE,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("MULTILINESTRINGZ", getGT(manager, Geometry.TYPES.MULTILINE,Geometry.SUBTYPES.GEOM3D));

            h2spatialGeometryTypes.put("MULTIPOLYGON", getGT(manager, Geometry.TYPES.MULTIPOLYGON,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("MULTIPOLYGONZ", getGT(manager, Geometry.TYPES.MULTIPOLYGON,Geometry.SUBTYPES.GEOM3D));

            h2spatialGeometryTypes.put("GEOMETRY", getGT(manager, Geometry.TYPES.GEOMETRY,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("GEOMETRYZ", getGT(manager, Geometry.TYPES.GEOMETRY,Geometry.SUBTYPES.GEOM3D));

            h2spatialGeometryTypes.put("GEOMCOLLECTION", getGT(manager, Geometry.TYPES.GEOMETRY,Geometry.SUBTYPES.GEOM2D));

            h2spatialGeometryTypes.put("GEOMCOLLECTIONZ", getGT(manager, Geometry.TYPES.GEOMETRY,Geometry.SUBTYPES.GEOM3D));

        }

        return h2spatialGeometryTypes.get(typeName);

    }

}