/*************************GO-LICENSE-START*********************************
* Copyright 2014 ThoughtWorks, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*************************GO-LICENSE-END***********************************/
package com.thoughtworks.go.util;
public class Pair<A,B> {
private final A a;
private final B b;
public static <U, V> Pair<U, V> pair(U a, V b) {
return new Pair<>(a, b);
}
public Pair(A a, B b){
this.a = a;
this.b = b;
}
public static<T> Pair<T,T> twins(T value){
return new Pair<>(value, value);
}
public A first(){
return a;
}
public B last(){
return b;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Pair pair = (Pair) o;
if (a != null ? !a.equals(pair.a) : pair.a != null) {
return false;
}
if (b != null ? !b.equals(pair.b) : pair.b != null) {
return false;
}
return true;
}
@Override
public int hashCode() {
int result = a != null ? a.hashCode() : 0;
result = 31 * result + (b != null ? b.hashCode() : 0);
return result;
}
}