| /* |
| * 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.pig.impl.util; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Copy of C++ STL pair container. |
| */ |
| public class Pair<T, U> implements Serializable { |
| |
| private static final long serialVersionUID = 1L; |
| public T first; |
| public U second; |
| |
| /** |
| * @param f First element in pair. |
| * @param s Second element in pair. |
| */ |
| public Pair(T f, U s) { |
| first = f; |
| second = s; |
| } |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString() { |
| return "[" + first.toString() +"," + second.toString() + "]"; |
| } |
| |
| @Override |
| public int hashCode() { |
| return (((this.first == null ? 1 : this.first.hashCode()) * 17) |
| + (this.second == null ? 1 : this.second.hashCode()) * 19); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if(other == null) { |
| return false; |
| } |
| |
| if(! (other instanceof Pair)) { |
| return false; |
| } |
| |
| Pair otherPair = (Pair) other; |
| |
| if(this.first == null) { |
| if(otherPair.first != null) { |
| return false; |
| } else { |
| return true; |
| } |
| } |
| |
| if(this.second == null) { |
| if(otherPair.second != null) { |
| return false; |
| } else { |
| return true; |
| } |
| } |
| |
| if(this.first.equals(otherPair.first) && this.second.equals(otherPair.second)) { |
| return true; |
| } else { |
| return false; |
| } |
| } |
| } |