org.geolatte.geom.codec.db.sqlserver.AbstractSqlServerEncoder Maven / Gradle / Ivy

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This geoLatte-geom library offers a geometry model that conforms to the OGC Simple Features for SQL specification.
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/*
 * This file is part of the GeoLatte project.
 *
 *     GeoLatte is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     GeoLatte 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 Lesser General Public License for more details.
 *
 *     You should have received a copy of the GNU Lesser General Public License
 *     along with GeoLatte.  If not, see .
 *
 * Copyright (C) 2010 - 2013 and Ownership of code is shared by:
 * Qmino bvba - Romeinsestraat 18 - 3001 Heverlee  (http://www.qmino.com)
 * Geovise bvba - Generaal Eisenhowerlei 9 - 2140 Antwerpen (http://www.geovise.com)
 */

package org.geolatte.geom.codec.db.sqlserver;

import org.geolatte.geom.Geometry;
import org.geolatte.geom.Position;
import org.geolatte.geom.PositionSequence;
import org.geolatte.geom.codec.db.Encoder;
import org.geolatte.geom.crs.CoordinateReferenceSystems;

import java.util.ArrayList;
import java.util.List;


abstract class AbstractSqlServerEncoder implements Encoder {

    @SuppressWarnings("unchecked")
    public > SqlServerGeometry encode(G geom) {
        SqlServerGeometry nativeGeom = new SqlServerGeometry();

        if (geom.getSRID() > 0) {
            nativeGeom.setCoordinateReferenceSystem(geom.getCoordinateReferenceSystem());
        }

        nativeGeom.setIsValid();

        if (CoordinateReferenceSystems.hasMeasureAxis(geom.getCoordinateReferenceSystem())) {
            nativeGeom.setHasMValues();
        }

        if (CoordinateReferenceSystems.hasVerticalAxis(geom.getCoordinateReferenceSystem())) {
            nativeGeom.setHasZValues();
        }

        CountingPositionSequenceBuilder coordinates = new CountingPositionSequenceBuilder(geom.getCoordinateReferenceSystem());
        List figures = new ArrayList();
        List shapes = new ArrayList();

        encode(geom, -1, coordinates, figures, shapes);
        encodePoints(nativeGeom, coordinates.toPositionSequence());
        encodeFigures(nativeGeom, figures);
        encodeShapes(nativeGeom, shapes);
        return nativeGeom;
    }

    /**
     * Appends the points, figures, shapes to the resp. lists
     *
     * @param geom             geometry to serialization
     * @param parentShapeIndex index of the parent Shape for the geometry
     * @param coordinates      coordinate list to append to
     * @param figures          figure list to append to
     * @param shapes           shape list to append to
     */
    protected abstract void encode(Geometry geom, int parentShapeIndex,
                                   CountingPositionSequenceBuilder coordinates,
                                   List figures, List shapes);


    protected void encodeShapes(SqlServerGeometry nativeGeom, List shapes) {
        nativeGeom.setNumberOfShapes(shapes.size());
        for (int i = 0; i < shapes.size(); i++) {
            nativeGeom.setShape(i, shapes.get(i));
        }
    }

    protected void encodeFigures(SqlServerGeometry nativeGeom, List figures) {
        nativeGeom.setNumberOfFigures(figures.size());
        for (int i = 0; i < figures.size(); i++) {
            nativeGeom.setFigure(i, figures.get(i));
        }
    }


    protected void encodePoints(SqlServerGeometry nativeGeom, PositionSequence coordinates) {
        nativeGeom.setNumberOfPoints(coordinates.size());
        nativeGeom.allocateMValueArray();
        nativeGeom.allocateZValueArray();
        for (int i = 0; i < coordinates.size(); i++) {
            setCoordinate(nativeGeom, i, coordinates);
        }
    }

    protected void setCoordinate(SqlServerGeometry nativeGeom, int idx, PositionSequence coordinates) {
        nativeGeom.setCoordinate(idx, coordinates);
    }

}