Source code

001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.io.network.util;
020
021import java.io.Serializable;
022
023public final class Pair<T1, T2> implements Serializable {
024  private final T1 first;
025  private final T2 second;
026
027  public T1 getFirst() {
028    return first;
029  }
030
031  public T2 getSecond() {
032    return second;
033  }
034
035  private String pairStr = null;
036
037  public Pair(final T1 first, final T2 second) {
038    this.first = first;
039    this.second = second;
040  }
041
042  @Override
043  public String toString() {
044    if (this.pairStr == null) {
045      this.pairStr = "(" + this.first + "," + this.second + ")";
046    }
047    return this.pairStr;
048  }
049}