1 /*-
2 * #%L
3 * prolobjectlink-jpi
4 * %%
5 * Copyright (C) 2012 - 2019 Prolobjectlink Project
6 * %%
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 * #L%
25 */
26 package io.github.prolobjectlink.prolog;
27
28 /**
29 * Partial implementation of {@link PrologIndicator} interface.
30 *
31 * @author Jose Zalacain
32 * @since 1.0
33 */
34 public class AbstractIndicator implements PrologIndicator {
35
36 private final String functor;
37 private final int arity;
38
39 protected AbstractIndicator(String functor, int arity) {
40 this.functor = functor;
41 this.arity = arity;
42 }
43
44 public final String getIndicator() {
45 return functor + "/" + arity;
46 }
47
48 public final String getFunctor() {
49 return functor;
50 }
51
52 public final int getArity() {
53 return arity;
54 }
55
56 @Override
57 public final String toString() {
58 return getIndicator();
59 }
60
61 @Override
62 public final int hashCode() {
63 final int prime = 31;
64 int result = 1;
65 result = prime * result + arity;
66 result = prime * result + ((functor == null) ? 0 : functor.hashCode());
67 return result;
68 }
69
70 @Override
71 public final boolean equals(Object object) {
72 if (this == object)
73 return true;
74 if (object == null)
75 return false;
76 // if (getClass() != object.getClass())
77 // return false;
78 AbstractIndicator other = (AbstractIndicator) object;
79 if (arity != other.arity)
80 return false;
81 if (functor == null) {
82 if (other.functor != null)
83 return false;
84 } else if (!functor.equals(other.functor)) {
85 return false;
86 }
87 return true;
88 }
89
90 }