cn.webfuse.core.lang.Pair Maven / Gradle / Ivy
/*
* Copyright [2018] [https://github.com/vipshop/vjtools]
*
* Further modifications copyright (c) 2019 by webfuse.cn
*
* 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.
*/
package cn.webfuse.core.lang;
/**
* 引入一个简简单单的Pair, 用于返回值返回两个元素.
*
* copy from vjtools
*/
public class Pair {
private final L left;
private final R right;
/**
* Creates a new pair.
*/
public Pair(L left, R right) {
this.left = left;
this.right = right;
}
public L getLeft() {
return left;
}
public R getRight() {
return right;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((left == null) ? 0 : left.hashCode());
return prime * result + ((right == null) ? 0 : right.hashCode());
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
Pair other = (Pair) obj;
if (left == null) {
if (other.left != null) {
return false;
}
} else if (!left.equals(other.left)) {
return false;
}
if (right == null) {
if (other.right != null) {
return false;
}
} else if (!right.equals(other.right)) {
return false;
}
return true;
}
@Override
public String toString() {
return "Pair [left=" + left + ", right=" + right + ']';
}
/**
* 根据等号左边的泛型，自动构造合适的Pair
*/
public static Pair of(L left, R right) {
return new Pair(left, right);
}
}