001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.record.meta;
020
021import java.io.IOException;
022import org.apache.hadoop.classification.InterfaceAudience;
023import org.apache.hadoop.classification.InterfaceStability;
024import org.apache.hadoop.record.RecordOutput;
025
026/** 
027 * Represents typeID for a Map 
028 * 
029 * @deprecated Replaced by <a href="https://hadoop.apache.org/avro/">Avro</a>.
030 */
031@Deprecated
032@InterfaceAudience.Public
033@InterfaceStability.Stable
034public class MapTypeID extends TypeID {
035  
036  private TypeID typeIDKey; 
037  private TypeID typeIDValue; 
038  
039  public MapTypeID(TypeID typeIDKey, TypeID typeIDValue) {
040    super(RIOType.MAP);
041    this.typeIDKey = typeIDKey;
042    this.typeIDValue = typeIDValue;
043  }
044  
045  /**
046   * get the TypeID of the map's key element
047   */
048  public TypeID getKeyTypeID() {
049    return this.typeIDKey;
050  }
051  
052  /**
053   * get the TypeID of the map's value element
054   */
055  public TypeID getValueTypeID() {
056    return this.typeIDValue;
057  }
058  
059  @Override
060  void write(RecordOutput rout, String tag) throws IOException {
061    rout.writeByte(typeVal, tag);
062    typeIDKey.write(rout, tag);
063    typeIDValue.write(rout, tag);
064  }
065  
066  /**
067   * Two map  typeIDs are equal if their constituent elements have the 
068   * same type
069   */
070  @Override
071  public boolean equals(Object o) {
072    if (!super.equals(o))
073      return false;
074
075    MapTypeID mti = (MapTypeID) o;
076
077    return this.typeIDKey.equals(mti.typeIDKey) &&
078           this.typeIDValue.equals(mti.typeIDValue);
079  }
080  
081  /**
082   * We use a basic hashcode implementation, since this class will likely not
083   * be used as a hashmap key 
084   */
085  @Override
086  public int hashCode() {
087    return 37*17+typeIDKey.hashCode() + 37*17+typeIDValue.hashCode();
088  }
089  
090}