org.geolatte.geom.codec.db.sqlserver.PointSqlServerDecoder 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.Point;
import org.geolatte.geom.PositionSequence;
import org.geolatte.geom.crs.CoordinateReferenceSystem;

/**
 * @author Karel Maesen, Geovise BVBA.
 * Date: Nov 2, 2009
 */
class PointSqlServerDecoder extends AbstractSqlServerDecoder {


    @Override
    protected OpenGisType getOpenGisType() {
        return OpenGisType.POINT;
    }

    protected Point createNullGeometry(CoordinateReferenceSystem crs) {
        return new Point(crs);
    }

    protected Point createGeometry(SqlServerGeometry nativeGeom) {
        return createPoint(nativeGeom, 0);
    }

    @Override
    protected Point createGeometry(SqlServerGeometry nativeGeom, int shapeIndex) {
        if (nativeGeom.isEmptyShape(shapeIndex)) {
            return createNullGeometry(nativeGeom.getCoordinateReferenceSystem());
        }
        int figureOffset = nativeGeom.getFiguresForShape(shapeIndex).start;
        int pntOffset = nativeGeom.getPointsForFigure(figureOffset).start;
        return createPoint(nativeGeom, pntOffset);
    }

    private Point createPoint(SqlServerGeometry nativeGeom, int pntOffset) {
        PositionSequence positionSequence = nativeGeom.coordinateRange(new IndexRange(pntOffset, pntOffset + 1));
        return new Point(positionSequence, nativeGeom.getCoordinateReferenceSystem());
    }


}