Class GeometryCollectionMapper

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
13	package org.locationtech.jts.geom.util;
14
15	import java.util.ArrayList;
16	import java.util.List;
17
18	import org.locationtech.jts.geom.Geometry;
19	import org.locationtech.jts.geom.GeometryCollection;
20	import org.locationtech.jts.geom.GeometryFactory;
21	import org.locationtech.jts.geom.util.GeometryMapper.MapOp;
22
23	/**
24	* Maps the members of a {@link GeometryCollection}
25	* into another <tt>GeometryCollection</tt> via a defined
26	* mapping function.
27	*
28	* @author Martin Davis
29	*
30	*/
31	public class GeometryCollectionMapper
32	{
33	public static GeometryCollection map(GeometryCollection gc, MapOp op)
34	{
35	GeometryCollectionMapper mapper = new GeometryCollectionMapper(op);
36	return mapper.map(gc);
37	}
38
39	private MapOp mapOp = null;
40
41	public GeometryCollectionMapper(MapOp mapOp) {
42	this.mapOp = mapOp;
43	}
44
45	public GeometryCollection map(GeometryCollection gc)
46	{
47	List mapped = new ArrayList();
48	for (int i = 0; i < gc.getNumGeometries(); i++) {
49	Geometry g = mapOp.map(gc.getGeometryN(i));
50	if (!g.isEmpty())
51	mapped.add(g);
52	}
53	return gc.getFactory().createGeometryCollection(
54	GeometryFactory.toGeometryArray(mapped));
55	}
56	}
57