01: /*
02: * The JTS Topology Suite is a collection of Java classes that
03: * implement the fundamental operations required to validate a given
04: * geo-spatial data set to a known topological specification.
05: *
06: * Copyright (C) 2001 Vivid Solutions
07: *
08: * This library is free software; you can redistribute it and/or
09: * modify it under the terms of the GNU Lesser General Public
10: * License as published by the Free Software Foundation; either
11: * version 2.1 of the License, or (at your option) any later version.
12: *
13: * This library is distributed in the hope that it will be useful,
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16: * Lesser General Public License for more details.
17: *
18: * You should have received a copy of the GNU Lesser General Public
19: * License along with this library; if not, write to the Free Software
20: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: *
22: * For more information, contact:
23: *
24: * Vivid Solutions
25: * Suite #1A
26: * 2328 Government Street
27: * Victoria BC V8T 5G5
28: * Canada
29: *
30: * (250)385-6040
31: * www.vividsolutions.com
32: */
33: package com.vividsolutions.jts.geomgraph;
34:
35: import java.util.*;
36: import com.vividsolutions.jts.algorithm.*;
37: import com.vividsolutions.jts.geom.*;
38: import com.vividsolutions.jts.noding.*;
39:
40: /**
41: * Validates that a collection of {@link Edge}s is correctly noded.
42: * Throws an appropriate exception if an noding error is found.
43: *
44: * @version 1.7
45: */
46: public class EdgeNodingValidator {
47:
48: private static Collection toSegmentStrings(Collection edges) {
49: // convert Edges to SegmentStrings
50: Collection segStrings = new ArrayList();
51: for (Iterator i = edges.iterator(); i.hasNext();) {
52: Edge e = (Edge) i.next();
53: segStrings.add(new SegmentString(e.getCoordinates(), e));
54: }
55: return segStrings;
56: }
57:
58: private NodingValidator nv;
59:
60: /**
61: * Creates a new validator for the given collection of {@link Edge}s.
62: *
63: * @param edges a collection of Edges.
64: */
65: public EdgeNodingValidator(Collection edges) {
66: nv = new NodingValidator(toSegmentStrings(edges));
67: }
68:
69: /**
70: * Checks whether the supplied edges
71: * are correctly noded. Throws an exception if they are not.
72: *
73: * @throws RuntimeException if the SegmentStrings are not correctly noded
74: */
75: public void checkValid() {
76: nv.checkValid();
77: }
78:
79: }
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