author | František Kučera <franta-hg@frantovo.cz> |
Mon, 26 Jul 2021 21:25:48 +0200 | |
branch | v_0 |
changeset 5 | f913370404eb |
parent 4 | 368ba99bb98f |
child 6 | 523c9c39c996 |
permissions | -rw-r--r-- |
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/** |
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* Relational pipes |
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* Copyright © 2021 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 GNU General Public License as published by |
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* the Free Software Foundation, version 3 of the License. |
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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 <relpipe/writer/RelationalWriter.h> |
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#include <relpipe/writer/RelpipeWriterException.h> |
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#include "lib/ASN1ContentHandler.h" |
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#include "Configuration.h" |
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namespace relpipe { |
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namespace in { |
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namespace asn1 { |
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class RelpipeASN1ContentHandler : public lib::ASN1ContentHandler { |
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private: |
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wstring_convert < codecvt_utf8<wchar_t>> convertor; // ASN.1 parser works with UTF-8 |
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std::shared_ptr<relpipe::writer::RelationalWriter> writer; |
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Configuration configuration; |
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relpipe::common::type::StringX currentRelationName; |
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std::vector<relpipe::writer::AttributeMetadata> currentAttributes; |
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enum class State { |
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Start, |
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Relation, |
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RelationName, |
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Header, |
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HeaderItem, |
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AttributeName, |
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AttributeType, |
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Records, |
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Record, |
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Attribute, |
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}; |
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State state = State::Start; |
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void assertTag(const Header& header, uint64_t expectedTag, TagClass expectedClass = TagClass::Universal) { |
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if (header.tagClass != expectedClass || header.tag != expectedTag) throw relpipe::writer::RelpipeWriterException(L"Unexpected tag."); // TODO: add actual vs. expected values |
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} |
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public: |
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RelpipeASN1ContentHandler(std::shared_ptr<relpipe::writer::RelationalWriter> writer, Configuration configuration) : writer(writer), configuration(configuration) { |
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} |
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bool setOption(const std::string& uri, const std::string& value) override { |
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return false; |
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} |
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void writeStreamStart() override { |
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} |
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void writeStreamEnd() override { |
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} |
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void writeCollectionStart(const Header& header) override { |
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assertTag(header, lib::UniversalType::Sequence); |
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if (state == State::Start) state = State::Relation; |
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else if (state == State::Relation) state = State::RelationName; |
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else if (state == State::Header) state = State::HeaderItem; |
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else if (state == State::HeaderItem) state = State::AttributeName; |
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else if (state == State::Records) state = State::Record; |
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else std::wcerr << L"writeCollectionStart(): state=" << (int) state << std::endl; // TODO: remove |
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} |
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void writeCollectionEnd() override { |
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if (state == State::Header) state = State::Records; |
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else if (state == State::AttributeType) state = State::HeaderItem; |
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else if (state == State::HeaderItem) state = State::Records; |
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else if (state == State::Records) state = State::Relation; |
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else if (state == State::Record) state = State::Record; |
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else std::wcerr << L"writeCollectionEnd(): state=" << (int) state << std::endl; // TODO: remove |
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if (state == State::Records) { |
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writer->startRelation(currentRelationName, currentAttributes, true); |
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currentRelationName = L""; |
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currentAttributes.clear(); |
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} |
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} |
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void writeBitString(const Header& header, std::vector<bool> value) override { |
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} |
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void writeBoolean(const Header& header, bool value) override { |
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if (state == State::Record) writer->writeAttribute(&value, typeid (value)); |
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} |
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void writeDateTime(const Header& header, DateTime value) override { |
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} |
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105 |
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void writeInteger(const Header& header, Integer value) override { |
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relpipe::common::type::Integer integer = value.toInt64(); |
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if (state == State::Record) writer->writeAttribute(&integer, typeid (integer)); |
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} |
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110 |
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void writeNull(const Header& header) override { |
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} |
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113 |
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void writeOID(const Header& header, ObjectIdentifier value) override { |
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} |
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116 |
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void writeOctetString(const Header& header, std::string value) override { |
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} |
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119 |
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void writeTextString(const Header& header, std::string value) override { |
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assertTag(header, lib::UniversalType::UTF8String); |
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relpipe::common::type::StringX str = convertor.from_bytes(value); |
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123 |
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if (state == State::RelationName) { |
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currentRelationName = convertor.from_bytes(value); |
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state = State::Header; |
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} else if (state == State::AttributeName) { |
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currentAttributes.push_back({str, relpipe::writer::TypeId::STRING}); |
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state = State::AttributeType; |
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} else if (state == State::AttributeType) { |
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currentAttributes.back().typeId = writer->toTypeId(str); |
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} else if (state == State::Record) { |
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writer->writeAttribute(&str, typeid (str)); |
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} else std::wcerr << L"writeTextString(): state=" << (int) state << std::endl; // TODO: remove |
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} |
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136 |
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void writeSpecific(const Header& header, std::string value) override { |
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} |
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139 |
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140 |
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141 |
}; |
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142 |
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} |
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} |
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} |