927 lines
19 KiB
C++
927 lines
19 KiB
C++
/*
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* This file is a part of morm
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* and is distributed under the 2-Clause BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2018-2023, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <cstdlib>
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#include <memory>
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#include "space/spaceparser.h"
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#include "dbconnector.h"
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#include "dbexpression.h"
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#include "model.h"
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#include "utf8/utf8.h"
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#include "convert/convert.h"
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namespace morm
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{
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DbConnector::DbConnector()
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{
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db_expression = nullptr;
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expression_allocated = false;
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log = nullptr;
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log_queries = false;
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transaction_index = 0;
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transaction_group = 0;
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}
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DbConnector::~DbConnector()
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{
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deallocate_expression();
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}
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void DbConnector::set_logger(pt::Log * log)
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{
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this->log = log;
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}
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void DbConnector::set_logger(pt::Log & log)
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{
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this->log = &log;
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}
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void DbConnector::set_log_queries(bool log_queries)
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{
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this->log_queries = log_queries;
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}
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bool DbConnector::query(const pt::TextStream & stream)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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return query(stream, *query_result_ptr);
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}
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bool DbConnector::query(const std::string & query_str)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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return query(query_str, *query_result_ptr);
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}
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bool DbConnector::query(const char * query_str)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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return query(query_str, *query_result_ptr);
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}
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bool DbConnector::query(const pt::TextStream & stream, QueryResult & query_result)
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{
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std::string query_str;
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stream.to_str(query_str);
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return query(query_str, query_result);
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}
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bool DbConnector::query(const std::string & query_str, QueryResult & query_result)
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{
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return query(query_str.c_str(), query_result);
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}
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bool DbConnector::query(const char * query_str, QueryResult & query_result)
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{
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// do query
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return false;
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}
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bool DbConnector::query_select(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_update(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_insert(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_remove(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_declare_cursor(const char * query_str, QueryResult & query_result)
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{
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return query(query_str, query_result);
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}
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bool DbConnector::query_select(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::query_update(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::query_insert(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::query_remove(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::query_declare_cursor(const pt::TextStream & stream, QueryResult & query_result)
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{
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return query(stream, query_result);
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}
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bool DbConnector::begin()
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{
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bool status = false;
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if( transaction_index > 0 )
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{
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pt::TextStream str;
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str << "SAVEPOINT savepoint_" << transaction_index;
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status = DbConnector::query(str);
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}
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else
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{
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status = DbConnector::query("BEGIN");
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}
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if( status )
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{
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transaction_index += 1;
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}
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else
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{
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if( log )
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{
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(*log) << pt::Log::log1 << "Morm: I cannot start a transaction" << pt::Log::logend;
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}
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}
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return status;
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}
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bool DbConnector::begin_if_needed()
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{
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bool status = true;
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if( transaction_index == 0 )
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{
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status = begin();
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}
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return status;
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}
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bool DbConnector::rollback()
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{
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return rollback(transaction_index);
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}
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bool DbConnector::commit()
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{
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return commit(transaction_index);
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}
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bool DbConnector::rollback_one_transaction(size_t index)
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{
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bool status = false;
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if( index > 1 )
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{
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pt::TextStream str;
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str << "ROLLBACK TO SAVEPOINT savepoint_" << (index - 1);
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status = DbConnector::query(str);
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transaction_index = index - 1; // decrement it even if rollback failed
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}
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else
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if( index == 1 )
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{
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status = DbConnector::query("ROLLBACK");
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transaction_index = 0;
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transaction_group += 1;
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}
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return status;
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}
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bool DbConnector::rollback(size_t index)
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{
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bool status = false;
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if( index == 0 )
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{
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if( log )
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{
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(*log) << pt::Log::log1 << "Morm: there is no a transaction with zero index - skipping rollback";
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}
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}
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else
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if( index > transaction_index )
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{
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if( log )
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{
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(*log) << pt::Log::log1 << "Morm: transaction";
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if( index > 1 )
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(*log) << " for savepoint_" << (index-1);
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(*log) << " does not exist - skipping rollback" << pt::Log::logend;
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}
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}
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else
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{
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status = true;
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for(size_t i = transaction_index ; i >= index ; --i)
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{
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if( !rollback_one_transaction(i) )
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{
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/*
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* return false if at least one rollback failed
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*/
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status = false;
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}
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}
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}
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return status;
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}
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bool DbConnector::commit_one_transaction(size_t index)
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{
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bool status = false;
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if( index > 1 )
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{
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pt::TextStream str;
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str << "RELEASE SAVEPOINT savepoint_" << (index - 1);
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status = DbConnector::query(str);
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transaction_index = index - 1;
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}
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else
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if( index == 1 )
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{
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status = DbConnector::query("COMMIT");
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transaction_index = 0;
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transaction_group += 1;
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}
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return status;
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}
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bool DbConnector::commit(size_t index)
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{
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bool status = false;
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if( index == 0 )
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{
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if( log )
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{
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(*log) << pt::Log::log1 << "Morm: there is no a transaction with zero index - skipping commit";
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}
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}
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else
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if( index > transaction_index )
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{
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if( log )
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{
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(*log) << pt::Log::log1 << "Morm: transaction";
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if( index > 1 )
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(*log) << " for savepoint_" << (index-1);
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(*log) << " does not exist - skipping commit" << pt::Log::logend;
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}
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}
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else
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{
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status = true;
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for(size_t i = transaction_index ; i >= index ; --i)
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{
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if( !commit_one_transaction(i) )
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{
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/*
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* return false if at least one commit failed
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*/
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status = false;
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}
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}
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}
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return status;
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}
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size_t DbConnector::get_transaction_index()
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{
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return transaction_index;
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}
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size_t DbConnector::get_transaction_group()
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{
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return transaction_group;
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}
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DbExpression * DbConnector::get_expression()
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{
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allocate_default_expression_if_needed();
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return db_expression;
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}
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void DbConnector::generate_select_columns(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_SELECT_COLUMNS);
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db_expression->allow_to_use_prefix(true);
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db_expression->generate_from_model(stream, model);
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}
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}
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void DbConnector::generate_insert_query(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->allow_to_use_prefix(false);
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stream << "INSERT INTO ";
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db_expression->schema_table_to_stream(stream, model.model_env->schema_name, model.model_env->table_name);
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stream << " (";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_INSERT);
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db_expression->generate_from_model(stream, model);
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stream << ") VALUES (";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_VALUES);
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db_expression->generate_from_model(stream, model);
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stream << ")";
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}
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}
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void DbConnector::generate_update_query(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->allow_to_use_prefix(false);
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stream << "UPDATE ";
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db_expression->schema_table_to_stream(stream, model.model_env->schema_name, model.model_env->table_name);
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stream << " SET ";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS_VALUES);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_UPDATE);
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db_expression->generate_from_model(stream, model);
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stream << " WHERE ";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS_VALUES);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_PRIMARY_KEY);
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db_expression->generate_from_model(stream, model);
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}
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}
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void DbConnector::generate_remove_query(pt::TextStream & stream, Model & model)
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{
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allocate_default_expression_if_needed();
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if( db_expression )
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{
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db_expression->clear();
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db_expression->allow_to_use_prefix(false);
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stream << "DELETE FROM ";
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db_expression->schema_table_to_stream(stream, model.model_env->schema_name, model.model_env->table_name);
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stream << " WHERE ";
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db_expression->set_work_mode(MORM_WORK_MODE_MODEL_FIELDS_VALUES);
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db_expression->set_output_type(MORM_OUTPUT_TYPE_DB_PRIMARY_KEY);
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db_expression->generate_from_model(stream, model);
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}
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}
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bool DbConnector::insert(pt::TextStream & stream, Model & model)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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generate_insert_query(stream, model);
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return query_insert(stream, *query_result_ptr);
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}
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bool DbConnector::update(pt::TextStream & stream, Model & model)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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generate_update_query(stream, model);
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return query_update(stream, *query_result_ptr);
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}
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bool DbConnector::remove(pt::TextStream & stream, Model & model)
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{
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std::unique_ptr<QueryResult> query_result_ptr(create_query_result());
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generate_remove_query(stream, model);
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return query_remove(stream, *query_result_ptr);
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}
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void DbConnector::deallocate_expression()
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{
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if( expression_allocated )
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{
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delete db_expression;
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db_expression = nullptr;
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expression_allocated = false;
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}
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}
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void DbConnector::allocate_default_expression_if_needed()
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{
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if( !db_expression )
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{
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allocate_default_expression();
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}
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}
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unsigned int DbConnector::unescape_hex_char_part(char hex)
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{
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if( hex>='0' && hex<='9' )
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{
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return hex - '0';
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}
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else
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if( hex>='a' && hex<='f' )
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{
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return hex - 'a' + 10;
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}
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else
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if( hex>='A' && hex<='F' )
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{
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return hex - 'A' + 10;
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}
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else
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{
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if( log )
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{
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(*log) << pt::Log::log2 << "Morm: incorrect character when reading a hex string, char code: " << (int)(unsigned char)hex;
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if( hex >= 32 )
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{
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(*log) << " '" << hex << "'";
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}
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(*log) << pt::Log::logend;
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}
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}
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return 0;
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}
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const char * DbConnector::unescape_hex_char(const char * str, size_t len, unsigned int & res)
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{
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unsigned int c;
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res = 0;
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for(size_t i = 0 ; i < len ; ++i)
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{
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if( *str != 0 )
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{
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c = unescape_hex_char_part(*str);
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str += 1;
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}
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else
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{
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c = 0;
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}
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res = (res << 4) | c;
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}
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return str;
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}
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void DbConnector::unescape_hex_char(const char * str, char & c)
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{
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unsigned int res = 0;
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unescape_hex_char(str, sizeof(char) * 2, res);
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c = (char)res;
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}
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void DbConnector::unescape_hex_char(const char * str, wchar_t & c)
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{
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unsigned int res = 0;
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unescape_hex_char(str, sizeof(wchar_t) * 2, res);
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c = (wchar_t)res;
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}
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void DbConnector::unescape_bin_char(const char * str, char & c)
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{
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unescape_hex_char(str, c);
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}
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void DbConnector::unescape_bin_char(const char * str, wchar_t & c)
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{
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unescape_hex_char(str, c);
|
|
}
|
|
|
|
|
|
void DbConnector::unescape_hex_string(const char * str, std::string & out)
|
|
{
|
|
unsigned int c = 0;
|
|
|
|
while( *str != 0 )
|
|
{
|
|
str = unescape_hex_char(str, sizeof(char) * 2, c);
|
|
out += (char)c;
|
|
}
|
|
}
|
|
|
|
|
|
void DbConnector::unescape_hex_string(const char * str, std::wstring & out)
|
|
{
|
|
unsigned int c = 0;
|
|
|
|
while( *str != 0 )
|
|
{
|
|
str = unescape_hex_char(str, sizeof(wchar_t) * 2, c);
|
|
out += (wchar_t)c;
|
|
}
|
|
}
|
|
|
|
|
|
void DbConnector::unescape_bin_string(const char * str, std::string & out)
|
|
{
|
|
unescape_hex_string(str, out);
|
|
}
|
|
|
|
|
|
void DbConnector::unescape_bin_string(const char * str, std::wstring & out)
|
|
{
|
|
unescape_hex_string(str, out);
|
|
}
|
|
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, char & field_value, const FT & field_type)
|
|
{
|
|
if( field_type.is_hexadecimal() )
|
|
{
|
|
unescape_hex_char(value_str, field_value);
|
|
}
|
|
else
|
|
if( field_type.is_binary() )
|
|
{
|
|
unescape_bin_char(value_str, field_value);
|
|
}
|
|
else
|
|
{
|
|
field_value = *value_str;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned char & field_value, const FT & field_type)
|
|
{
|
|
char tmp_char;
|
|
get_value(value_str, tmp_char, field_type);
|
|
field_value = static_cast<unsigned char>(tmp_char);
|
|
}
|
|
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, wchar_t & field_value, const FT & field_type)
|
|
{
|
|
field_value = 0;
|
|
|
|
if( field_type.is_hexadecimal() )
|
|
{
|
|
unescape_hex_char(value_str, field_value);
|
|
}
|
|
else
|
|
if( field_type.is_binary() )
|
|
{
|
|
unescape_bin_char(value_str, field_value);
|
|
}
|
|
else
|
|
{
|
|
if( field_type.use_utf8() )
|
|
{
|
|
int value_int;
|
|
bool is_correct;
|
|
|
|
pt::utf8_to_int(value_str, value_int, is_correct);
|
|
|
|
if( is_correct )
|
|
{
|
|
field_value = static_cast<wchar_t>(value_int);
|
|
}
|
|
else
|
|
{
|
|
field_value = 0xFFFD; // U+FFFD "replacement character";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
field_value = static_cast<wchar_t>((unsigned char)*value_str);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, std::string & field_value, const FT & field_type)
|
|
{
|
|
if( field_type.is_hexadecimal() )
|
|
{
|
|
unescape_hex_string(value_str, field_value);
|
|
}
|
|
else
|
|
if( field_type.is_binary() )
|
|
{
|
|
unescape_bin_string(value_str, field_value);
|
|
}
|
|
else
|
|
{
|
|
field_value = value_str;
|
|
}
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, std::string_view & field_value, const FT & field_type)
|
|
{
|
|
field_value = value_str;
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, std::wstring & field_value, const FT & field_type)
|
|
{
|
|
if( field_type.is_hexadecimal() )
|
|
{
|
|
unescape_hex_string(value_str, field_value);
|
|
}
|
|
else
|
|
if( field_type.is_binary() )
|
|
{
|
|
unescape_bin_string(value_str, field_value);
|
|
}
|
|
else
|
|
{
|
|
if( field_type.use_utf8() )
|
|
{
|
|
pt::utf8_to_wide(value_str, field_value);
|
|
}
|
|
else
|
|
{
|
|
for(size_t i=0 ; value_str[i] != 0 ; ++i)
|
|
{
|
|
field_value += static_cast<wchar_t>((unsigned char)value_str[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, bool & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME
|
|
// this 't' is locale dependent
|
|
field_value = (value_str[0]=='t' || value_str[0]=='y' || value_str[0]=='1');
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, short & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = (short)pt::to_i(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned short & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = (unsigned short)pt::to_ui(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, int & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::to_i(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned int & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::to_ui(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::to_l(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::to_ul(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, long long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::to_ll(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, unsigned long long & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = pt::to_ull(value_str, 10);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, float & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = strtof(value_str, 0);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, double & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = strtod(value_str, 0);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, long double & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some overflow checking
|
|
field_value = strtold(value_str, 0);
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, pt::Date & field_value, const FT & field_type)
|
|
{
|
|
// IMPROVE ME give some log if parsing failed
|
|
|
|
if( field_type.is_date_only() )
|
|
{
|
|
field_value.ParseYearMonthDay(value_str);
|
|
}
|
|
else
|
|
if( field_type.is_time_only() )
|
|
{
|
|
field_value.ParseHourMinSec(value_str);
|
|
}
|
|
else
|
|
{
|
|
field_value.Parse(value_str, !field_type.is_no_time_zone());
|
|
}
|
|
}
|
|
|
|
|
|
void DbConnector::get_value(const char * value_str, pt::Space & field_value, const FT & field_type)
|
|
{
|
|
field_value.clear();
|
|
|
|
if( *value_str != '\0' )
|
|
{
|
|
pt::SpaceParser space_parser;
|
|
|
|
if( field_type.is_space() )
|
|
{
|
|
if( space_parser.parse_space(value_str, field_value) != pt::SpaceParser::ok )
|
|
{
|
|
field_value.clear();
|
|
|
|
if( log )
|
|
{
|
|
(*log) << pt::Log::log2 << "Morm: I cannot correctly parse the Space struct (space format) from the datebase"
|
|
<< ", the raw string was: " << value_str << pt::Log::logend;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( space_parser.parse_json(value_str, field_value) != pt::SpaceParser::ok )
|
|
{
|
|
field_value.clear();
|
|
|
|
if( log )
|
|
{
|
|
(*log) << pt::Log::log2 << "Morm: I cannot correctly parse the Space struct (json format) from the datebase"
|
|
<< ", the raw string was: " << value_str << pt::Log::logend;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
const char * DbConnector::query_last_sequence(const wchar_t * sequence_table_name)
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
|
|
}
|