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.

There is a newer version: 1.9.1

/*
 * 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());
    }


}