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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.LineString;
import org.geolatte.geom.Polygon;
import org.geolatte.geom.Position;
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);
}
}
