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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.*;
import java.util.List;
/**
* Encoder for Polygons.
*
* @uthor Karel Maesen, Geovise BVBA
*/
class PolygonSqlServerEncoder extends AbstractSqlServerEncoder {
public boolean accepts(Geometry geom) {
return geom instanceof Polygon;
}
@Override
protected void encode(Geometry geom, int parentShapeIndex, CountingPositionSequenceBuilder coordinates, List figures, List shapes) {
if ( !( geom instanceof Polygon ) ) {
throw new IllegalArgumentException( "Polygon geometry expected." );
}
if ( geom.isEmpty() ) {
shapes.add( new Shape( parentShapeIndex, -1, OpenGisType.POLYGON ) );
return;
}
Polygon polygon = (Polygon) geom;
int figureOffset = figures.size();
shapes.add( new Shape( parentShapeIndex, figureOffset, OpenGisType.POLYGON ) );
int pointOffset = coordinates.getNumAdded();
addExteriorRing( polygon, coordinates, figures );
addInteriorRings( polygon, coordinates, figures );
}
private void addInteriorRings(Polygon geom, CountingPositionSequenceBuilder coordinates, List figures) {
for ( int idx = 0; idx < geom.getNumInteriorRing(); idx++ ) {
addInteriorRing( geom.getInteriorRingN( idx ), coordinates, figures );
}
}
private void addInteriorRing(LineString ring, CountingPositionSequenceBuilder coordinates, List figures) {
int pointOffset = coordinates.getNumAdded();
addPoints( ring, coordinates );
Figure figure = new Figure( FigureAttribute.InteriorRing, pointOffset );
figures.add( figure );
}
private void addPoints(LineString ring, CountingPositionSequenceBuilder coordinates) {
double[] c = new double[coordinates.getCoordinateDimension()];
for ( Position p : ring.getPositions() ) {
coordinates.add( p.toArray(c) );
}
}
private void addExteriorRing(Polygon geom, CountingPositionSequenceBuilder coordinates, List figures) {
LineString shell = geom.getExteriorRing();
int offset = coordinates.getNumAdded();
addPoints( shell, coordinates );
Figure exterior = new Figure( FigureAttribute.ExteriorRing, offset );
figures.add( exterior );
}
}
