01: /*
02: * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
03: * for visualizing and manipulating spatial features with geometry and attributes.
04: *
05: * Copyright (C) 2003 Vivid Solutions
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * as published by the Free Software Foundation; either version 2
10: * of the License, or (at your option) any later version.
11: *
12: * This program is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: * GNU General Public License for more details.
16: *
17: * You should have received a copy of the GNU General Public License
18: * along with this program; if not, write to the Free Software
19: * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20: *
21: * For more information, contact:
22: *
23: * Vivid Solutions
24: * Suite #1A
25: * 2328 Government Street
26: * Victoria BC V8T 5G5
27: * Canada
28: *
29: * (250)385-6040
30: * www.vividsolutions.com
31: */
32:
33: package com.vividsolutions.jump.qa.diff;
34:
35: import com.vividsolutions.jump.feature.*;
36: import java.util.*;
37: import com.vividsolutions.jump.task.TaskMonitor;
38:
39: /**
40: * Finds all line segments in two
41: * FeatureCollections which occur once only.
42: */
43: public class DiffSegments {
44:
45: private FeatureCollection[] fc = new FeatureCollection[2];
46: private UnmatchedEdgeExtracter[] uee = new UnmatchedEdgeExtracter[2];
47: private TaskMonitor monitor;
48:
49: public DiffSegments(TaskMonitor monitor) {
50: this .monitor = monitor;
51: }
52:
53: public void setSegments(int index, FeatureCollection fc) {
54: this .fc[index] = fc;
55: uee[index] = new UnmatchedEdgeExtracter();
56: for (Iterator it = fc.getFeatures().iterator(); it.hasNext();) {
57: Feature f = (Feature) it.next();
58: uee[index].add(f.getGeometry());
59: }
60: }
61:
62: /**
63: * Returns all the subedges from fc which are unmatched.
64: */
65: public FeatureCollection computeDiffEdges(int index) {
66: List diffEdges = new ArrayList();
67: UnmatchedEdgeExtracter otherUee = uee[1 - index];
68: for (Iterator i = fc[index].getFeatures().iterator(); i
69: .hasNext();) {
70: Feature f = (Feature) i.next();
71: otherUee.getDiffEdges(f.getGeometry(), diffEdges);
72: }
73: return FeatureDatasetFactory.createFromGeometry(diffEdges);
74: }
75:
76: }
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