/**
* Creates a {@link Geometry} with the same extent as the given envelope. The Geometry returned is
* guaranteed to be valid. To provide this behaviour, the following cases occur:
*
* <p>If the <code>Envelope</code> is:
*
* <ul>
* <li>null : returns an empty {@link Point}
* <li>a point : returns a non-empty {@link Point}
* <li>a line : returns a two-point {@link LineString}
* <li>a rectangle : returns a {@link Polygon}> whose points are (minx, miny), (minx, maxy),
* (maxx, maxy), (maxx, miny), (minx, miny).
* </ul>
*
* @param envelope the <code>Envelope</code> to convert
* @return an empty <code>Point</code> (for null <code>Envelope</code>s), a <code>Point</code>
* (when min x = max x and min y = max y) or a <code>Polygon</code> (in all other cases)
*/
public Geometry toGeometry(Envelope envelope) {
// null envelope - return empty point geometry
if (envelope.isNull()) {
return createPoint((CoordinateSequence) null);
}
// point?
if (envelope.getMinX() == envelope.getMaxX() && envelope.getMinY() == envelope.getMaxY()) {
return createPoint(new Coordinate(envelope.getMinX(), envelope.getMinY()));
}
// vertical or horizontal line?
if (envelope.getMinX() == envelope.getMaxX() || envelope.getMinY() == envelope.getMaxY()) {
return createLineString(
new Coordinate[] {
new Coordinate(envelope.getMinX(), envelope.getMinY()),
new Coordinate(envelope.getMaxX(), envelope.getMaxY())
});
}
// create a CW ring for the polygon
return createPolygon(
createLinearRing(
new Coordinate[] {
new Coordinate(envelope.getMinX(), envelope.getMinY()),
new Coordinate(envelope.getMinX(), envelope.getMaxY()),
new Coordinate(envelope.getMaxX(), envelope.getMaxY()),
new Coordinate(envelope.getMaxX(), envelope.getMinY()),
new Coordinate(envelope.getMinX(), envelope.getMinY())
}),
null);
}
public MCIndexedPointInAreaLocator(Geometry g) {
areaGeom = g;
if (!(g instanceof Polygonal)) throw new IllegalArgumentException("Argument must be Polygonal");
buildIndex(g);
Envelope env = g.getEnvelopeInternal();
maxXExtent = env.getMaxX() + 1.0;
}