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 | * Predicate constant key, describing a predicate constant. |
22 | * |
23 | * @author Michael Meyling |
24 | */ |
25 | public final class PredicateKey { |
26 | |
27 | /** Predicate name. */ |
28 | private String name; |
29 | |
30 | /** Predicate argument number. */ |
31 | private String arguments; |
32 | |
33 | /** |
34 | * Constructor. |
35 | * |
36 | * @param name Predicate name. |
37 | * @param arguments Predicate argument number. |
38 | */ |
39 | public PredicateKey(final String name, final String arguments) { |
40 | this.name = name; |
41 | this.arguments = arguments; |
42 | } |
43 | |
44 | /** |
45 | * Get predicate name. |
46 | * |
47 | * @return Predicate name. |
48 | */ |
49 | public String getName() { |
50 | return name; |
51 | } |
52 | |
53 | /** |
54 | * Get predicate argument number. |
55 | * |
56 | * @return Number of arguments. |
57 | */ |
58 | public String getArguments() { |
59 | return arguments; |
60 | } |
61 | |
62 | public int hashCode() { |
63 | return (getName() != null ? getName().hashCode() : 0) |
64 | ^ (getArguments() != null ? getArguments().hashCode() : 0); |
65 | } |
66 | |
67 | public boolean equals(final Object obj) { |
68 | if (!(obj instanceof PredicateKey)) { |
69 | return false; |
70 | } |
71 | final PredicateKey other = (PredicateKey) obj; |
72 | return EqualsUtility.equals(getName(), other.getName()) |
73 | && EqualsUtility.equals(getArguments(), other.getArguments()); |
74 | } |
75 | |
76 | public String toString() { |
77 | return getName() + "[" + getArguments() + "]"; |
78 | } |
79 | |
80 | } |