| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The ASF licenses this file to you 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 org.apache.storm.streams; |
| |
| import java.io.Serializable; |
| |
| /** |
| * A pair of values. |
| * |
| * @param <T1> the type of the first value |
| * @param <T2> the type of the second value |
| */ |
| public final class Pair<T1, T2> implements Serializable { |
| /** |
| * The first value. |
| */ |
| public final T1 value1; |
| /** |
| * The second value. |
| */ |
| public final T2 value2; |
| |
| /** |
| * Constructs a new pair of values. |
| * |
| * @param first the first value |
| * @param second the second value |
| */ |
| private Pair(T1 first, T2 second) { |
| value1 = first; |
| value2 = second; |
| } |
| |
| /** |
| * Constructs a new pair of values. |
| * |
| * @param first the first value |
| * @param second the second value |
| * @param <T1> the type of the first value |
| * @param <T2> the type of the second value |
| * @return a new pair of values |
| */ |
| public static <T1, T2> Pair<T1, T2> of(T1 first, T2 second) { |
| return new Pair<>(first, second); |
| } |
| |
| /** |
| * Returns the first value in a pair. |
| * |
| * @return the first value |
| */ |
| public T1 getFirst() { |
| return value1; |
| } |
| |
| /** |
| * Returns the second value in a pair. |
| * |
| * @return the second value |
| */ |
| public T2 getSecond() { |
| return value2; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| Pair<?, ?> pair = (Pair<?, ?>) o; |
| |
| if (value1 != null ? !value1.equals(pair.value1) : pair.value1 != null) { |
| return false; |
| } |
| return value2 != null ? value2.equals(pair.value2) : pair.value2 == null; |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = value1 != null ? value1.hashCode() : 0; |
| result = 31 * result + (value2 != null ? value2.hashCode() : 0); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return "(" + value1 + ", " + value2 + ')'; |
| } |
| } |