Subversion Repositories hibernate-spatial

/*
 * $Id: LineStringDecoder.java 163 2010-03-08 22:29:37Z maesenka $
 *
 * This file is part of Hibernate Spatial, an extension to the
 * hibernate ORM solution for geographic data.
 *
 * Copyright © 2007-2010 Geovise BVBA
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * For more information, visit: http://www.hibernatespatial.org/
 */

package org.hibernatespatial.sqlserver.convertors;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateSequence;
import com.vividsolutions.jts.geom.LineString;
import org.hibernatespatial.mgeom.MCoordinate;
import org.hibernatespatial.mgeom.MGeometryFactory;

class LineStringDecoder extends AbstractDecoder<LineString> {

    public LineStringDecoder(MGeometryFactory factory) {
        super(factory);
    }

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

    protected LineString createNullGeometry() {
        return getGeometryFactory().createLineString((CoordinateSequence) null);
    }

    protected LineString createGeometry(SqlServerGeometry nativeGeom) {
        return createLineString(nativeGeom, new IndexRange(0, nativeGeom.getNumPoints()));
    }

    @Override
    protected LineString createGeometry(SqlServerGeometry nativeGeom, int shapeIndex) {
        if (nativeGeom.isEmptyShape(shapeIndex)) return createNullGeometry();
        int figureOffset = nativeGeom.getFiguresForShape(shapeIndex).start;
        IndexRange pntIndexRange = nativeGeom.getPointsForFigure(figureOffset);
        return createLineString(nativeGeom, pntIndexRange);
    }

    protected LineString createLineString(SqlServerGeometry nativeGeom, IndexRange pntIndexRange) {
        Coordinate[] coordinates = nativeGeom.coordinateRange(pntIndexRange);
        return createLineString(coordinates, nativeGeom.hasMValues());
    }

    private LineString createLineString(Coordinate[] coords, boolean hasM) {
        if (hasM) {
            return getGeometryFactory().createMLineString((MCoordinate[]) coords);
        } else {
            return getGeometryFactory().createLineString(coords);
        }

    }


}