[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.record.meta; |
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| 20 | |
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| 21 | import java.io.IOException; |
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| 22 | import java.util.*; |
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| 23 | |
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| 24 | import org.apache.hadoop.record.RecordOutput; |
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| 25 | |
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| 26 | /** |
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| 27 | * Represents typeID for a Map |
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| 28 | */ |
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| 29 | public class MapTypeID extends TypeID { |
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| 30 | |
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| 31 | private TypeID typeIDKey; |
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| 32 | private TypeID typeIDValue; |
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| 33 | |
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| 34 | public MapTypeID(TypeID typeIDKey, TypeID typeIDValue) { |
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| 35 | super(RIOType.MAP); |
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| 36 | this.typeIDKey = typeIDKey; |
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| 37 | this.typeIDValue = typeIDValue; |
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| 38 | } |
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| 39 | |
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| 40 | /** |
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| 41 | * get the TypeID of the map's key element |
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| 42 | */ |
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| 43 | public TypeID getKeyTypeID() { |
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| 44 | return this.typeIDKey; |
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| 45 | } |
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| 46 | |
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| 47 | /** |
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| 48 | * get the TypeID of the map's value element |
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| 49 | */ |
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| 50 | public TypeID getValueTypeID() { |
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| 51 | return this.typeIDValue; |
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| 52 | } |
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| 53 | |
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| 54 | void write(RecordOutput rout, String tag) throws IOException { |
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| 55 | rout.writeByte(typeVal, tag); |
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| 56 | typeIDKey.write(rout, tag); |
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| 57 | typeIDValue.write(rout, tag); |
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| 58 | } |
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| 59 | |
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| 60 | /** |
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| 61 | * Two map typeIDs are equal if their constituent elements have the |
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| 62 | * same type |
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| 63 | */ |
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| 64 | public boolean equals(Object o) { |
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| 65 | if (!super.equals(o)) |
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| 66 | return false; |
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| 67 | |
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| 68 | MapTypeID mti = (MapTypeID) o; |
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| 69 | |
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| 70 | return this.typeIDKey.equals(mti.typeIDKey) && |
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| 71 | this.typeIDValue.equals(mti.typeIDValue); |
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| 72 | } |
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| 73 | |
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| 74 | /** |
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| 75 | * We use a basic hashcode implementation, since this class will likely not |
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| 76 | * be used as a hashmap key |
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| 77 | */ |
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| 78 | public int hashCode() { |
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| 79 | return 37*17+typeIDKey.hashCode() + 37*17+typeIDValue.hashCode(); |
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| 80 | } |
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| 81 | |
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| 82 | } |
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