MapShape.java

/**
 * Copyright (C) 2006 Steve Ratcliffe
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * Author: steve
 * Date: 23-Dec-2006
 */
package uk.me.parabola.mkgmap.general;

import uk.me.parabola.imgfmt.app.Coord;
import uk.me.parabola.mkgmap.filters.ShapeMergeFilter;

/**
 * A shape or polygon is just the same as a line really as far as I can tell.
 * There are some things that you cannot do with them semantically.
 *
 * @author Steve Ratcliffe.
 */
public class MapShape extends MapLine {// So top code can link objects from here
	private long osmid; //TODO: remove debug aid
	private long fullArea = Long.MAX_VALUE; // meaning unset
	public MapShape() {
		osmid = 0;
	}
	public MapShape(long id) {
		osmid = id;
	}
	MapShape(MapShape s) {
		super(s);
		this.osmid = s.osmid;
		this.fullArea = s.getFullArea();
	}

	public MapShape copy() {
		return new MapShape(this);
	}

	public void setDirection(boolean direction) {
		throw new IllegalArgumentException(
				"can't set a direction on a polygon");
	}

	public void setOsmid(long osmid) {
		this.osmid = osmid;
	}

	public long getOsmid() {
		return osmid;
	}

	public void setFullArea(long fullArea) {
		this.fullArea = fullArea;
	}

	public long getFullArea() { // this is unadulterated size, +ve if clockwise
		if (this.fullArea == Long.MAX_VALUE) {
			java.util.List<Coord> points = this.getPoints();
			if (points.size() >= 4 && points.get(0).highPrecEquals(points.get(points.size()-1)))
				this.fullArea = ShapeMergeFilter.calcAreaSizeTestVal(points);
		}
		return this.fullArea;
	}

}