content: /*
   * 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.carbondata.core.devapi;
  
  public interface BiDictionary<K, V> {
  
    /**
     * Get the dictionary key corresponding to the input value, generate a new key if value is
     * not exist. The new key value pair will be added to this dictionary
     * @param value dictionary value
     * @return dictionary key
     */
    K getOrGenerateKey(V value);
  
    /**
     * Get the dictionary key corresponding to the input value, return null if value is not exist in
     * the dictionary.
     * @param value dictionary value
     * @return dictionary key
     */
    K getKey(V value);
  
    /**
     * Get dictionary value corresponding to the input key, return null if key is not exist in the
     * dictionary.
     * @param key dictionary key
     * @return dictionary value
     */
    V getValue(K key);
  
    /**
     * Return the size of the dictionary
     * @return size
     */
    int size();
  }
  