1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
2 | * |
3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
4 | * |
5 | * "Hilbert II" is free software; you can redistribute |
6 | * it and/or modify it under the terms of the GNU General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2 of the License, or (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | */ |
15 | |
16 | package org.qedeq.kernel.bo.logic.common; |
17 | |
18 | import org.qedeq.base.utility.EqualsUtility; |
19 | |
20 | /** |
21 | * One subject variable. This class is mainly used in the model area. |
22 | * For this kernel he normal form of a subject variable is an |
23 | * {@link org.qedeq.kernel.se.base.list.ElementList} |
24 | * with an {@link org.qedeq.kernel.se.base.list.Atom} with the name of the subject variable. |
25 | * |
26 | * @author Michael Meyling |
27 | */ |
28 | public class SubjectVariable { |
29 | |
30 | /** Text to identify the subject variable. */ |
31 | private final String name; |
32 | |
33 | /** |
34 | * Constructor. |
35 | * |
36 | * @param name Show this to represent the subject variable within outputs. |
37 | */ |
38 | public SubjectVariable(final String name) { |
39 | this.name = name; |
40 | } |
41 | |
42 | /** |
43 | * Get subject variable name. |
44 | * |
45 | * @return Subject variable name. |
46 | */ |
47 | public String getName() { |
48 | return name; |
49 | } |
50 | |
51 | public int hashCode() { |
52 | return name.hashCode(); |
53 | } |
54 | |
55 | public boolean equals(final Object other) { |
56 | if (!(other instanceof SubjectVariable)) { |
57 | return false; |
58 | } |
59 | final SubjectVariable var = (SubjectVariable) other; |
60 | return EqualsUtility.equals(name, var.name); |
61 | } |
62 | |
63 | public String toString() { |
64 | return name; |
65 | } |
66 | |
67 | } |