# Coverage details for edu.uci.ics.jung.graph.predicates.IsolatedVertexPredicate

Line | Hits | Source
--- | --- | ---
1 |  | `/*`
2 |  | `* Copyright (c) 2003, the JUNG Project and the Regents of the University of`
3 |  | `* California All rights reserved.`
4 |  | `*`
5 |  | `* This software is open-source under the BSD license; see either "license.txt"`
6 |  | `* or http://jung.sourceforge.net/license.txt for a description.`
7 |  | `*`
8 |  | `* Created on Mar 3, 2004`
9 |  | `*/`
10 |  | `package edu.uci.ics.jung.graph.predicates;`
11 |  | ``
12 |  | `import edu.uci.ics.jung.graph.ArchetypeVertex;`
13 |  | ``
14 |  | `/**`
15 |  | `* A predicate which tests to see whether a specified`
16 |  | `* vertex has any neighbors. Not suitable for use`
17 |  | `* as a constraint.`
18 |  | `*`
19 |  | `* @author Joshua O'Madadhain`
20 |  | `*/`
21 |  | `public class IsolatedVertexPredicate extends VertexPredicate {`
22 |  | ``
23 |  | `private static IsolatedVertexPredicate instance;`
24 |  | ``
25 |  | `private static final String message = "IsolatedVertexPredicate";`
26 |  | ``
27 |  | `/**`
28 |  | `* Returns an instance of this class.`
29 |  | `*/`
30 |  | `public static IsolatedVertexPredicate getInstance() {`
31 | 3 | `if (instance == null) instance = new IsolatedVertexPredicate();`
32 | 3 | `return instance;`
33 |  | `}`
34 |  | ``
35 |  | `public String toString() {`
36 | 0 | `return message;`
37 |  | `}`
38 |  | ``
39 |  | `/**`
40 |  | `* Returns <code>true</code> if the argument is a <code>Vertex</code>`
41 |  | `* whose degree is 0.`
42 |  | `*`
43 |  | `* @see org.apache.commons.collections.Predicate#evaluate(java.lang.Object)`
44 |  | `*/`
45 |  | `public boolean evaluateVertex(ArchetypeVertex v) {`
46 | 13 | `return (v.degree() == 0);`
47 |  | `}`
48 |  | ``
49 |  | `/**`
50 |  | `* This constructor is protected in order to keep equals working by`
51 |  | `* retaining only one instance. (Currently, since there can only be one`
52 |  | `* instance, equals trivially returns true. If this class is extended, be`
53 |  | `* careful to write equals correctly.)`
54 |  | `*/`
55 |  | `protected IsolatedVertexPredicate() {`
56 | 2 | `super();`
57 | 2 | `}`
58 |  | `}`

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