author | František Kučera <franta-hg@frantovo.cz> |
Sun, 09 Dec 2018 22:38:17 +0100 | |
branch | v_0 |
changeset 31 | f153025c5b21 |
parent 30 | 3f18cb7a6963 |
child 41 | 744b61559eb2 |
permissions | -rw-r--r-- |
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/** |
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license of protocol, reader and writer: GNU LGPLv3+ or GNU GPLv2+
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* Relational pipes (library) |
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* Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the: |
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* - GNU Lesser General Public License as published by the Free Software Foundation; |
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* either version 3 of the License, or (at your option) any later version; |
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* or (at your option) |
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* - GNU General Public License as published by the Free Software Foundation; |
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* either version 2 of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#pragma once |
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#include <string> |
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#include <iostream> |
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#include <vector> |
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#include <relpipe/protocol/constants.h> |
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#include "../include/relpipe/writer/typedefs.h" |
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#include "../include/relpipe/writer/RelationalWriter.h" |
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#include "../include/relpipe/writer/TypeId.h" |
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#include "../include/relpipe/writer/AttributeMetadata.h" |
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#include "DataTypeWriterBase.h" |
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#include "types/BooleanDataTypeWriter.h" |
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#include "types/IntegerDataTypeWriter.h" |
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#include "types/StringDataTypeWriter.h" |
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namespace relpipe { |
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namespace writer { |
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using namespace relpipe::protocol; |
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class StreamRelationalWriter : public RelationalWriter { |
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private: |
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std::ostream &output; |
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types::BooleanDataTypeWriter booleanWriter; |
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types::IntegerDataTypeWriter integerWriter; |
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types::StringDataTypeWriter stringWriter; |
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std::vector<DataTypeWriterBase*> writers = {&booleanWriter, &integerWriter, &stringWriter}; |
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/** |
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* count of columns in the current table |
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*/ |
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integer_t columnCount; |
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/** |
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* number of column (0 = first) that will be written; after writing, the number is increased and prepared for next one |
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*/ |
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integer_t currentColumn; |
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/** |
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* types of columns in the current table |
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*/ |
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std::vector<TypeId> columnTypes; |
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void writeString(const string_t &stringValue, const TypeId typeId) { |
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for (DataTypeWriterBase* writer : writers) if (writer->supports(typeId)) return writer->writeString(output, stringValue); |
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throw RelpipeWriterException(L"Unsupported data type: " + static_cast<integer_t> (typeId)); |
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} |
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void writeRaw(const void* value, const type_info& typeInfo, const TypeId typeId) { |
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for (DataTypeWriterBase* writer : writers) if (writer->supports(typeId)) return writer->writeRaw(output, value, typeInfo); |
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throw RelpipeWriterException(L"Unsupported data type: " + static_cast<integer_t> (typeId)); |
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} |
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public: |
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StreamRelationalWriter(std::ostream &output) : |
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output(output) { |
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} |
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TypeId toTypeId(const string_t typeCode) override { |
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for (DataTypeWriterBase* writer : writers) if (writer->supports(typeCode)) return writer->getTypeId(); |
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throw RelpipeWriterException(L"Unsupported data type: " + typeCode); |
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} |
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void startRelation(string_t name, std::vector<AttributeMetadata> attributes, boolean_t writeHeader) override { |
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string_t tableName = name; |
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columnCount = attributes.size(); |
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currentColumn = 0; |
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// Write table name and column count: |
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integerWriter.writeValue(output, DATA_PART_START); |
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stringWriter.writeValue(output, tableName); |
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integerWriter.writeValue(output, columnCount); |
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columnTypes.clear(); |
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columnTypes.resize(columnCount); |
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// Write column names: |
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for (size_t c = 0; c < columnCount; c++) { |
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wstring columnName = attributes[c].attributeName; |
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stringWriter.writeValue(output, columnName); |
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} |
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// Write column types: |
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106 |
for (size_t c = 0; c < columnCount; c++) { |
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use AttributeMetadata instead of std::pair for relation header
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107 |
TypeId typeId = attributes[c].typeId; |
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writeAttribute() with raw pointer and type_info
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108 |
integerWriter.writeValue(output, static_cast<integer_t> (typeId)); |
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640e88aedf8f
code for table generation ported from the prototype: RelationalGenerator.h
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parents:
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109 |
columnTypes[c] = typeId; |
640e88aedf8f
code for table generation ported from the prototype: RelationalGenerator.h
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parents:
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110 |
} |
640e88aedf8f
code for table generation ported from the prototype: RelationalGenerator.h
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parents:
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111 |
|
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0a40752e401d
shared library with pure abstract class (interface)
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112 |
} |
0a40752e401d
shared library with pure abstract class (interface)
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113 |
|
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replace writeRecord() with sequence of writeAttribute()
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114 |
void writeAttribute(const string_t& value) override { |
f2cccaa9dd38
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115 |
if (currentColumn == 0) integerWriter.writeValue(output, DATA_PART_ROW); |
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116 |
writeString(value, columnTypes[currentColumn]); |
f2cccaa9dd38
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117 |
if (++currentColumn == columnCount) currentColumn = 0; |
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add data type and catalog classes from the prototype
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118 |
} |
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119 |
|
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writeAttribute() with raw pointer and type_info
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120 |
void writeAttribute(const void* value, const std::type_info& type) override { |
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parents:
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121 |
if (currentColumn == 0) integerWriter.writeValue(output, DATA_PART_ROW); |
3613617d3076
writeAttribute() with raw pointer and type_info
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parents:
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122 |
writeRaw(value, type, columnTypes[currentColumn]); |
3613617d3076
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parents:
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123 |
if (++currentColumn == columnCount) currentColumn = 0; |
3613617d3076
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124 |
} |
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writeAttribute() with raw pointer and type_info
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125 |
|
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01dd90eeedbb
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126 |
}; |
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127 |
|
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03750aff8619
writer only writes + refactoring
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128 |
} |
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129 |
} |