[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 | #ifndef HADOOP_PIPES_TEMPLATE_FACTORY_HH |
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| 19 | #define HADOOP_PIPES_TEMPLATE_FACTORY_HH |
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| 20 | |
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| 21 | namespace HadoopPipes { |
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| 22 | |
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| 23 | template <class mapper, class reducer> |
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| 24 | class TemplateFactory2: public Factory { |
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| 25 | public: |
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| 26 | Mapper* createMapper(MapContext& context) const { |
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| 27 | return new mapper(context); |
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| 28 | } |
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| 29 | Reducer* createReducer(ReduceContext& context) const { |
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| 30 | return new reducer(context); |
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| 31 | } |
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| 32 | }; |
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| 33 | |
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| 34 | template <class mapper, class reducer, class partitioner> |
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| 35 | class TemplateFactory3: public TemplateFactory2<mapper,reducer> { |
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| 36 | public: |
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| 37 | Partitioner* createPartitioner(MapContext& context) const { |
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| 38 | return new partitioner(context); |
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| 39 | } |
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| 40 | }; |
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| 41 | |
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| 42 | template <class mapper, class reducer> |
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| 43 | class TemplateFactory3<mapper, reducer, void> |
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| 44 | : public TemplateFactory2<mapper,reducer> { |
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| 45 | }; |
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| 46 | |
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| 47 | template <class mapper, class reducer, class partitioner, class combiner> |
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| 48 | class TemplateFactory4 |
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| 49 | : public TemplateFactory3<mapper,reducer,partitioner>{ |
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| 50 | public: |
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| 51 | Reducer* createCombiner(MapContext& context) const { |
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| 52 | return new combiner(context); |
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| 53 | } |
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| 54 | }; |
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| 55 | |
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| 56 | template <class mapper, class reducer, class partitioner> |
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| 57 | class TemplateFactory4<mapper,reducer,partitioner,void> |
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| 58 | : public TemplateFactory3<mapper,reducer,partitioner>{ |
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| 59 | }; |
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| 60 | |
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| 61 | template <class mapper, class reducer, class partitioner, |
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| 62 | class combiner, class recordReader> |
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| 63 | class TemplateFactory5 |
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| 64 | : public TemplateFactory4<mapper,reducer,partitioner,combiner>{ |
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| 65 | public: |
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| 66 | RecordReader* createRecordReader(MapContext& context) const { |
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| 67 | return new recordReader(context); |
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| 68 | } |
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| 69 | }; |
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| 70 | |
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| 71 | template <class mapper, class reducer, class partitioner,class combiner> |
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| 72 | class TemplateFactory5<mapper,reducer,partitioner,combiner,void> |
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| 73 | : public TemplateFactory4<mapper,reducer,partitioner,combiner>{ |
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| 74 | }; |
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| 75 | |
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| 76 | template <class mapper, class reducer, class partitioner=void, |
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| 77 | class combiner=void, class recordReader=void, |
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| 78 | class recordWriter=void> |
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| 79 | class TemplateFactory |
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| 80 | : public TemplateFactory5<mapper,reducer,partitioner,combiner,recordReader>{ |
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| 81 | public: |
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| 82 | RecordWriter* createRecordWriter(ReduceContext& context) const { |
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| 83 | return new recordWriter(context); |
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| 84 | } |
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| 85 | }; |
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| 86 | |
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| 87 | template <class mapper, class reducer, class partitioner, |
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| 88 | class combiner, class recordReader> |
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| 89 | class TemplateFactory<mapper, reducer, partitioner, combiner, recordReader, |
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| 90 | void> |
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| 91 | : public TemplateFactory5<mapper,reducer,partitioner,combiner,recordReader>{ |
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| 92 | }; |
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| 93 | |
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| 94 | } |
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| 95 | |
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| 96 | #endif |
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