1package org.testng.internal.collections;
2
3import org.testng.collections.Objects;
4
5
6
7
8
9public class Pair<A, B> {
10  private final A first;
11  private final B second;
12
13  public Pair(A first, B second) {
14    this.first = first;
15    this.second = second;
16  }
17
18  public A first() {
19    return first;
20  }
21
22  public B second() {
23    return second;
24  }
25
26  @Override
27  public int hashCode() {
28    final int prime = 31;
29    int result = 1;
30    result = prime * result + ((first == null) ? 0 : first.hashCode());
31    result = prime * result + ((second == null) ? 0 : second.hashCode());
32    return result;
33  }
34
35  @Override
36  public boolean equals(Object obj) {
37    if (this == obj) {
38      return true;
39    }
40    if (obj == null) {
41      return false;
42    }
43    if (getClass() != obj.getClass()) {
44      return false;
45    }
46    final Pair other = (Pair) obj;
47    if (first == null) {
48      if (other.first != null) {
49        return false;
50      }
51    }
52    else if (!first.equals(other.first)) {
53      return false;
54    }
55    if (second == null) {
56      if (other.second != null) {
57        return false;
58      }
59    }
60    else if (!second.equals(other.second)) {
61      return false;
62    }
63    return true;
64  }
65
66  public static <A, B> Pair<A, B> create(A first, B second) {
67    return of(first, second);
68  }
69
70  public static <A, B> Pair<A, B> of(A a, B b) {
71    return new Pair<>(a, b);
72  }
73
74  @Override
75  public String toString() {
76    return Objects.toStringHelper(getClass())
77        .add("first", first())
78        .add("second", second())
79        .toString();
80  }
81}