Line | Hits | Source |
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1 | /* | |
2 | * Copyright (c) 2003, the JUNG Project and the Regents of the University | |
3 | * of California | |
4 | * All rights reserved. | |
5 | * | |
6 | * This software is open-source under the BSD license; see either | |
7 | * "license.txt" or | |
8 | * http://jung.sourceforge.net/license.txt for a description. | |
9 | */ | |
10 | /* | |
11 | * Created on Mar 22, 2004 | |
12 | */ | |
13 | package edu.uci.ics.jung.graph.predicates; | |
14 | ||
15 | import java.util.Iterator; | |
16 | import java.util.Set; | |
17 | ||
18 | import edu.uci.ics.jung.graph.ArchetypeGraph; | |
19 | import edu.uci.ics.jung.graph.Vertex; | |
20 | ||
21 | /** | |
22 | * Returns true if this graph is a clique (that is, if | |
23 | * each vertex in the graph is a neighbor of each other | |
24 | * vertex; also known as a <i>complete graph</i>). | |
25 | * | |
26 | * @author danyelf | |
27 | */ | |
28 | public class CliqueGraphPredicate extends GraphPredicate { | |
29 | ||
30 | private static final String message = "CliqueGraphPredicate"; | |
31 | private static CliqueGraphPredicate instance; | |
32 | ||
33 | protected CliqueGraphPredicate() | |
34 | { | |
35 | 1 | super(); |
36 | 1 | } |
37 | ||
38 | public static CliqueGraphPredicate getInstance() | |
39 | { | |
40 | 10 | if (instance == null) |
41 | 1 | instance = new CliqueGraphPredicate(); |
42 | 10 | return instance; |
43 | } | |
44 | ||
45 | /** | |
46 | * @see edu.uci.ics.jung.graph.predicates.GraphPredicate#evaluateGraph(edu.uci.ics.jung.graph.ArchetypeGraph) | |
47 | */ | |
48 | public boolean evaluateGraph(ArchetypeGraph g) { | |
49 | 11 | for (Iterator iter = g.getVertices().iterator(); iter.hasNext();) { |
50 | 43 | Vertex v = (Vertex) iter.next(); |
51 | 43 | int wanted = g.numVertices() - 1; |
52 | 43 | Set s = v.getNeighbors(); |
53 | ||
54 | 43 | if( s.contains( v )) |
55 | 20 | wanted += 1; |
56 | 43 | if (s.size() != wanted) |
57 | 3 | return false; |
58 | } | |
59 | 8 | return true; |
60 | ||
61 | } | |
62 | ||
63 | public String toString() { | |
64 | 0 | return message; |
65 | } | |
66 | ||
67 | } |
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