31 #include <relpipe/reader/handlers/RelationalReaderStringHandler.h> |
31 #include <relpipe/reader/handlers/RelationalReaderStringHandler.h> |
32 #include <relpipe/reader/handlers/AttributeMetadata.h> |
32 #include <relpipe/reader/handlers/AttributeMetadata.h> |
33 |
33 |
34 #include <relpipe/writer/Factory.h> |
34 #include <relpipe/writer/Factory.h> |
35 |
35 |
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36 #include <relpipe/cli/RelpipeCLIException.h> |
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37 |
36 namespace relpipe { |
38 namespace relpipe { |
37 namespace tr { |
39 namespace tr { |
38 namespace grep { |
40 namespace grep { |
39 |
41 |
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42 using namespace std; |
40 using namespace relpipe; |
43 using namespace relpipe; |
41 using namespace relpipe::reader; |
44 using namespace relpipe::reader; |
42 using namespace relpipe::reader::handlers; |
45 using namespace relpipe::reader::handlers; |
43 |
46 |
44 class GrepHandler : public RelationalReaderStringHadler { |
47 class GrepHandler : public RelationalReaderStringHadler { |
45 private: |
48 private: |
46 std::shared_ptr<writer::RelationalWriter> relationalWriter; |
49 shared_ptr<writer::RelationalWriter> relationalWriter; |
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50 |
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51 wregex relationNameRegEx; |
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52 wregex attributeNameRegEx; |
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53 wregex searchRegEx; |
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54 |
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55 vector<boolean_t> currentSearchableAttributes; |
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56 vector<string_t> currentRecord; |
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57 integer_t currentAttributeIndex = 0; |
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58 boolean_t includeCurrentRecord = false; |
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59 boolean_t filterCurrentRelation = false; |
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60 |
47 public: |
61 public: |
48 |
62 |
49 GrepHandler(std::ostream& output) { |
63 GrepHandler(ostream& output, const vector<string_t>& arguments) { |
50 relationalWriter.reset(writer::Factory::create(output)); |
64 relationalWriter.reset(writer::Factory::create(output)); |
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65 |
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66 if (arguments.size() == 3) { |
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67 relationNameRegEx = wregex(arguments[0]); |
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68 attributeNameRegEx = wregex(arguments[1]); |
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69 searchRegEx = wregex(arguments[2]); |
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70 } else { |
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71 throw cli::RelpipeCLIException(L"Usage: relpipe-tr-grep <relationNameRegExp> <attributeNameRegExp> <searchRegExp>", cli::CLI::EXIT_CODE_UNKNOWN_COMMAND); |
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72 } |
51 } |
73 } |
52 |
74 |
53 void startRelation(string_t name, std::vector<AttributeMetadata> attributes) override { |
75 void startRelation(string_t name, vector<AttributeMetadata> attributes) override { |
54 // TODO: move to a reusable method (or use same metadata on both reader and writer side?) |
76 // TODO: move to a reusable method (or use same metadata on both reader and writer side?) |
55 std::vector<writer::AttributeMetadata> writerMetadata; |
77 vector<writer::AttributeMetadata> writerMetadata; |
56 for (AttributeMetadata readerMetadata : attributes) { |
78 for (AttributeMetadata readerMetadata : attributes) { |
57 writerMetadata.push_back({readerMetadata.getAttributeName(), relationalWriter->toTypeId(readerMetadata.getTypeName())}); |
79 writerMetadata.push_back({readerMetadata.getAttributeName(), relationalWriter->toTypeId(readerMetadata.getTypeName())}); |
58 } |
80 } |
59 |
81 |
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82 |
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83 currentRecord.resize(attributes.size()); |
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84 currentSearchableAttributes.resize(attributes.size(), false); |
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85 filterCurrentRelation = regex_match(name, relationNameRegEx); |
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86 if (filterCurrentRelation) { |
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87 for (int i = 0; i < currentSearchableAttributes.size(); i++) { |
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88 currentSearchableAttributes[i] = regex_match(attributes[i].getAttributeName(), attributeNameRegEx); |
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89 } |
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90 } |
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91 |
60 relationalWriter->startRelation(name, writerMetadata, true); |
92 relationalWriter->startRelation(name, writerMetadata, true); |
61 } |
93 } |
62 |
94 |
63 void attribute(const string_t& value) override { |
95 void attribute(const string_t& value) override { |
64 relationalWriter->writeAttribute(value); |
96 if (filterCurrentRelation) { |
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97 currentRecord[currentAttributeIndex] = value; |
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98 |
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99 if (currentSearchableAttributes[currentAttributeIndex]) { |
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100 includeCurrentRecord |= regex_search(value, searchRegEx); |
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101 } |
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102 |
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103 currentAttributeIndex++; |
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104 |
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105 if (currentAttributeIndex > 0 && currentAttributeIndex % currentSearchableAttributes.size() == 0) { |
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106 if (includeCurrentRecord) for (string_t v : currentRecord) relationalWriter->writeAttribute(v); |
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107 includeCurrentRecord = false; |
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108 } |
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109 |
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110 currentAttributeIndex = currentAttributeIndex % currentSearchableAttributes.size(); |
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111 } else { |
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112 relationalWriter->writeAttribute(value); |
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113 } |
65 } |
114 } |
66 |
115 |
67 void endOfPipe() { |
116 void endOfPipe() { |
68 |
117 |
69 } |
118 } |