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/*
 * 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.netease.arctic.log.data;

import java.io.Serializable;
import java.util.Map;

/**
 * An internal data structure representing data of map.
 */
public interface LogMapData {
  /**
   * Returns the number of key-value mappings in this map.
   */
  int size();

  /**
   * Returns an array view of the keys contained in this map.
   *
   * A key-value pair has the same index in the key array and value array.
   */
  LogArrayData keyArray();

  /**
   * Returns an array view of the values contained in this map.
   *
   * A key-value pair has the same index in the key array and value array.
   */
  LogArrayData valueArray();

  /**
   * used by log deserialization
   */
  interface Factory extends Serializable {
    LogMapData create(Map result);
  }
}