content: /**
   * Copyright 1999-2011 Alibaba Group
   *
   * 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 com.alibaba.cobar.client.support.vo;
  
  /**
   * value object to model a Key-Value entity which similar to Map.Entry, but more generic.<br>
   * you can use other alternatives too if you would like to.
   * 
   * @author fujohnwang
   *
   * @param <K>
   * @param <V>
   */
  public class Pair<K,V> {
      private K key;
      private V value;
      
      public K getKey() {
          return key;
      }
      public void setKey(K key) {
          this.key = key;
      }
      public V getValue() {
          return value;
      }
      public void setValue(V value) {
          this.value = value;
      }
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((key == null) ? 0 : key.hashCode());
          result = prime * result + ((value == null) ? 0 : value.hashCode());
          return result;
      }
      @Override
      public boolean equals(Object obj) {
          if (this == obj)
              return true;
          if (obj == null)
              return false;
          if (getClass() != obj.getClass())
              return false;
          Pair other = (Pair) obj;
          if (key == null) {
              if (other.key != null)
                  return false;
          } else if (!key.equals(other.key))
              return false;
          if (value == null) {
              if (other.value != null)
                  return false;
          } else if (!value.equals(other.value))
              return false;
          return true;
      }
      @Override
      public String toString() {
          return "Pair [key=" + key + ", value=" + value + "]";
      }
      
  }
  