/**
 * 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 com.datatorrent.lib.util;

import java.util.AbstractMap;

/**
 *
 * A single KeyValPair for basic data passing, It is a write once, and read often model. <p>
 * <br>
 * Key and Value are to be treated as immutable objects.
 *
 * @param <K>
 * @param <V>
 * @since 0.3.2
 */
public class KeyValPair<K, V> extends AbstractMap.SimpleEntry<K, V>
{
  private static final long serialVersionUID = 201301281547L;

  /**
   * Added default constructor for deserializer.
   */
  private KeyValPair()
  {
    super(null, null);
  }

  /**
   * Constructor
   *
   * @param k sets key
   * @param v sets value
   */
  public KeyValPair(K k, V v)
  {
    super(k, v);
  }

}