1 //
2 // ========================================================================
3 // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.start.graph;
20
21 /**
22 * Represents a selection criteria.
23 * <p>
24 * Each <code>Selection</code> can be used [0..n] times in the graph. The <code>Selection</code> must contain a unique
25 * 'criteria' description that how selection was determined.
26 */
27 public class Selection
28 {
29 private final boolean explicit;
30 private final String criteria;
31
32 public Selection(String criteria)
33 {
34 this(criteria,true);
35 }
36
37 /**
38 * The Selection criteria
39 *
40 * @param criteria
41 * the selection criteria
42 * @param explicit
43 * true if explicitly selected, false if transitively selected.
44 */
45 public Selection(String criteria, boolean explicit)
46 {
47 this.criteria = criteria;
48 this.explicit = explicit;
49 }
50
51 public Selection asTransitive()
52 {
53 if (this.explicit)
54 {
55 return new Selection(criteria,false);
56 }
57 return this;
58 }
59
60 @Override
61 public boolean equals(Object obj)
62 {
63 if (this == obj)
64 {
65 return true;
66 }
67 if (obj == null)
68 {
69 return false;
70 }
71 if (getClass() != obj.getClass())
72 {
73 return false;
74 }
75 Selection other = (Selection)obj;
76 if (explicit != other.explicit)
77 {
78 return false;
79 }
80 if (criteria == null)
81 {
82 if (other.criteria != null)
83 {
84 return false;
85 }
86 }
87 else if (!criteria.equals(other.criteria))
88 {
89 return false;
90 }
91 return true;
92 }
93
94 /**
95 * Get the criteria for this selection
96 * @return the criteria
97 */
98 public String getCriteria()
99 {
100 return criteria;
101 }
102
103 @Override
104 public int hashCode()
105 {
106 final int prime = 31;
107 int result = 1;
108 result = (prime * result) + (explicit ? 1231 : 1237);
109 result = (prime * result) + ((criteria == null) ? 0 : criteria.hashCode());
110 return result;
111 }
112
113 public boolean isExplicit()
114 {
115 return explicit;
116 }
117
118 @Override
119 public String toString()
120 {
121 StringBuilder str = new StringBuilder();
122 if (!explicit)
123 {
124 str.append("<transitive from> ");
125 }
126 str.append(criteria);
127 return str.toString();
128 }
129 }