org.geolatte.geom.LinearRing Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of geolatte-geom Show documentation

This geoLatte-geom library offers a geometry model that conforms to the OGC Simple Features for SQL specification.

The newest version!

/*
 * 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 - 2011 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;

import org.geolatte.geom.crs.CoordinateReferenceSystem;

/**
 * A LineString that is both closed and simple.
 *
 * @author Karel Maesen, Geovise BVBA
 *         creation-date: 4/14/11
 */
public class LinearRing extends LineString
 {

    public LinearRing(LineString
 lineString) {
        super(lineString);
        checkIsClosed();
    }

    public LinearRing(CoordinateReferenceSystem
 crs) {
        super(crs);
    }

    public LinearRing(PositionSequence
 points, CoordinateReferenceSystem crs) {
        super(points, crs);
        checkIsClosed();
    }

    @Override
    public GeometryType getGeometryType() {
        return GeometryType.LINEARRING;
    }

    private void checkIsClosed(){
        if (isEmpty() || (isClosed() && getNumPositions() >= 3)) return;
        throw new IllegalArgumentException("Cannot create a LinearRing. PointSequence is not closed or contains < 4 points.");
    }

    @Override
    @SuppressWarnings("unchecked")
    public  LinearRing as(Class castToType){
        checkCast(castToType);
        return (LinearRing)this;
    }
}