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 | #ifndef CSVARCHIVE_HH_ |
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20 | #define CSVARCHIVE_HH_ |
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21 | |
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22 | #include "recordio.hh" |
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23 | |
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24 | namespace hadoop { |
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25 | |
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26 | class PushBackInStream { |
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27 | private: |
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28 | InStream* stream; |
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29 | bool isAvail; |
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30 | char pbchar; |
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31 | public: |
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32 | void setStream(InStream* stream_) { |
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33 | stream = stream_; |
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34 | isAvail = false; |
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35 | pbchar = 0; |
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36 | } |
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37 | ssize_t read(void* buf, size_t len) { |
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38 | if (len > 0 && isAvail) { |
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39 | char* p = (char*) buf; |
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40 | *p = pbchar; |
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41 | isAvail = false; |
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42 | if (len > 1) { |
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43 | ssize_t ret = stream->read((char*)buf + 1, len - 1); |
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44 | return ret + 1; |
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45 | } else { |
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46 | return 1; |
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47 | } |
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48 | } else { |
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49 | return stream->read(buf, len); |
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50 | } |
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51 | } |
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52 | void pushBack(char c) { |
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53 | pbchar = c; |
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54 | isAvail = true; |
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55 | } |
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56 | }; |
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57 | |
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58 | class CsvIndex : public Index { |
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59 | private: |
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60 | PushBackInStream& stream; |
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61 | public: |
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62 | CsvIndex(PushBackInStream& _stream) : stream(_stream) {} |
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63 | bool done() { |
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64 | char c; |
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65 | stream.read(&c, 1); |
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66 | if (c != ',') { |
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67 | stream.pushBack(c); |
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68 | } |
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69 | return (c == '}') ? true : false; |
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70 | } |
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71 | void incr() {} |
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72 | ~CsvIndex() {} |
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73 | }; |
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74 | |
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75 | class ICsvArchive : public IArchive { |
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76 | private: |
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77 | PushBackInStream stream; |
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78 | public: |
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79 | ICsvArchive(InStream& _stream) { stream.setStream(&_stream); } |
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80 | virtual void deserialize(int8_t& t, const char* tag); |
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81 | virtual void deserialize(bool& t, const char* tag); |
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82 | virtual void deserialize(int32_t& t, const char* tag); |
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83 | virtual void deserialize(int64_t& t, const char* tag); |
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84 | virtual void deserialize(float& t, const char* tag); |
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85 | virtual void deserialize(double& t, const char* tag); |
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86 | virtual void deserialize(std::string& t, const char* tag); |
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87 | virtual void deserialize(std::string& t, size_t& len, const char* tag); |
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88 | virtual void startRecord(Record& s, const char* tag); |
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89 | virtual void endRecord(Record& s, const char* tag); |
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90 | virtual Index* startVector(const char* tag); |
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91 | virtual void endVector(Index* idx, const char* tag); |
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92 | virtual Index* startMap(const char* tag); |
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93 | virtual void endMap(Index* idx, const char* tag); |
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94 | virtual ~ICsvArchive(); |
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95 | }; |
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96 | |
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97 | class OCsvArchive : public OArchive { |
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98 | private: |
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99 | OutStream& stream; |
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100 | bool isFirst; |
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101 | |
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102 | void printCommaUnlessFirst() { |
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103 | if (!isFirst) { |
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104 | stream.write(",",1); |
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105 | } |
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106 | isFirst = false; |
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107 | } |
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108 | public: |
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109 | OCsvArchive(OutStream& _stream) : stream(_stream) {isFirst = true;} |
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110 | virtual void serialize(int8_t t, const char* tag); |
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111 | virtual void serialize(bool t, const char* tag); |
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112 | virtual void serialize(int32_t t, const char* tag); |
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113 | virtual void serialize(int64_t t, const char* tag); |
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114 | virtual void serialize(float t, const char* tag); |
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115 | virtual void serialize(double t, const char* tag); |
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116 | virtual void serialize(const std::string& t, const char* tag); |
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117 | virtual void serialize(const std::string& t, size_t len, const char* tag); |
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118 | virtual void startRecord(const Record& s, const char* tag); |
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119 | virtual void endRecord(const Record& s, const char* tag); |
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120 | virtual void startVector(size_t len, const char* tag); |
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121 | virtual void endVector(size_t len, const char* tag); |
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122 | virtual void startMap(size_t len, const char* tag); |
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123 | virtual void endMap(size_t len, const char* tag); |
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124 | virtual ~OCsvArchive(); |
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125 | }; |
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126 | |
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127 | } |
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128 | #endif /*CSVARCHIVE_HH_*/ |
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