/**
    * 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.hadoop.hbase.util;
  
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  
  /**
   * Utility class to manage a triple.
   */
  @InterfaceAudience.Private
  public class Triple<A, B, C> {
    private A first;
    private B second;
    private C third;
  
    public Triple(A first, B second, C third) {
      this.first = first;
      this.second = second;
      this.third = third;
    }
  
    // ctor cannot infer types w/o warning but a method can.
    public static <A, B, C> Triple<A, B, C> create(A first, B second, C third) {
      return new Triple<A, B, C>(first, second, third);
    }
  
    public int hashCode() {
      int hashFirst = (first != null ? first.hashCode() : 0);
      int hashSecond = (second != null ? second.hashCode() : 0);
      int hashThird = (third != null ? third.hashCode() : 0);
  
      return (hashFirst >> 1) ^ hashSecond ^ (hashThird << 1);
    }
  
    public boolean equals(Object obj) {
      if (!(obj instanceof Triple)) {
        return false;
      }
  
      Triple<?, ?, ?> otherTriple = (Triple<?, ?, ?>) obj;
  
      if (first != otherTriple.first && (first != null && !(first.equals(otherTriple.first))))
        return false;
      if (second != otherTriple.second && (second != null && !(second.equals(otherTriple.second))))
        return false;
      if (third != otherTriple.third && (third != null && !(third.equals(otherTriple.third))))
        return false;
  
      return true;
    }
  
    public String toString() {
      return "(" + first + ", " + second + "," + third + " )";
    }
  
    public A getFirst() {
      return first;
    }
  
    public void setFirst(A first) {
      this.first = first;
    }
  
    public B getSecond() {
      return second;
    }
  
    public void setSecond(B second) {
      this.second = second;
    }
  
    public C getThird() {
      return third;
    }
  
    public void setThird(C third) {
      this.third = third;
    }
  }