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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.internal.cache.persistence.soplog;

import java.util.Iterator;

/**
 * Provides an {@link Iterator} view over a collection of keys and values.  The
 * implementor must provide access to the current key/value as well as a means
 * to move to the next pair.
 * 
 * @author bakera
 *
 * @param  the key type
 * @param  the value type
 */
public interface KeyValueIterator extends Iterator {
  /**
   * Returns the key at the current position.
   * @return the key
   */
  public K key();
  
  /**
   * Returns the value at the current position.
   * @return the value
   */
  public abstract V value();
}