Class PreparedGeometryFactory

1	/*
2	* Copyright (c) 2016 Vivid Solutions.
3	*
4	* All rights reserved. This program and the accompanying materials
5	* are made available under the terms of the Eclipse Public License 2.0
6	* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
7	* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
8	* and the Eclipse Distribution License is available at
9	*
10	* http://www.eclipse.org/org/documents/edl-v10.php.
11	*/
12	package org.locationtech.jts.geom.prep;
13
14	import org.locationtech.jts.geom.Geometry;
15	import org.locationtech.jts.geom.Lineal;
16	import org.locationtech.jts.geom.Polygonal;
17	import org.locationtech.jts.geom.Puntal;
18
19	/**
20	* A factory for creating {@link PreparedGeometry}s.
21	* It chooses an appropriate implementation of PreparedGeometry
22	* based on the geometric type of the input geometry.
23	* <p>
24	* In the future, the factory may accept hints that indicate
25	* special optimizations which can be performed.
26	* <p>
27	* Instances of this class are thread-safe.
28	*
29	* @author Martin Davis
30	*
31	*/
32	public class PreparedGeometryFactory
33	{
34	/**
35	* Creates a new {@link PreparedGeometry} appropriate for the argument {@link Geometry}.
36	*
37	* @param geom the geometry to prepare
38	* @return the prepared geometry
39	*/
40	public static PreparedGeometry prepare(Geometry geom)
41	{
42	return (new PreparedGeometryFactory()).create(geom);
43	}
44
45	public PreparedGeometryFactory() {
46	}
47
48	/**
49	* Creates a new {@link PreparedGeometry} appropriate for the argument {@link Geometry}.
50	*
51	* @param geom the geometry to prepare
52	* @return the prepared geometry
53	*/
54	public PreparedGeometry create(Geometry geom)
55	{
56	if (geom instanceof Polygonal)
57	return new PreparedPolygon((Polygonal) geom);
58	if (geom instanceof Lineal)
59	return new PreparedLineString((Lineal) geom);
60	if (geom instanceof Puntal)
61	return new PreparedPoint((Puntal) geom);
62
63	/**
64	* Default representation.
65	*/
66	return new BasicPreparedGeometry(geom);
67	}
68	}
69