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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