360 lines
7.2 KiB
C++
360 lines
7.2 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, 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 "expression.h"
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#include "model.h"
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namespace morm
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{
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Expression::Expression()
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{
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out_stream = nullptr;
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model = nullptr;
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json_escaper = nullptr;
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db_escaper = nullptr;
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}
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Expression::~Expression()
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{
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}
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void Expression::set_json_escaper(BaseEscaper & json_escaper)
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{
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this->json_escaper = &json_escaper;
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}
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void Expression::set_db_escaper(BaseEscaper & db_escaper)
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{
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this->db_escaper = &db_escaper;
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}
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void Expression::generate_from_model()
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{
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before_generate_from_model();
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model->map_fields();
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after_generate_from_model();
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}
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void Expression::before_generate_from_model()
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{
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is_first_field = true;
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if( work_mode == MORM_WORK_MODE_MODEL_FIELDS_VALUES )
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{
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if( output_type == MORM_OUTPUT_TYPE_JSON )
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{
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(*out_stream) << "{";
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}
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}
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}
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void Expression::after_generate_from_model()
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{
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if( work_mode == MORM_WORK_MODE_MODEL_FIELDS_VALUES )
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{
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if( output_type == MORM_OUTPUT_TYPE_JSON )
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{
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(*out_stream) << "}";
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}
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}
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}
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bool Expression::can_field_be_generated(bool insertable, bool updatable, bool is_primary_key)
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{
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if( output_type == MORM_OUTPUT_TYPE_DB_INSERT )
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{
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return insertable;
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}
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else
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if( output_type == MORM_OUTPUT_TYPE_DB_UPDATE )
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{
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return updatable;
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}
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else
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if( output_type == MORM_OUTPUT_TYPE_DB_PRIMARY_KEY )
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{
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return is_primary_key;
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}
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else
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{
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return true;
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}
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}
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void Expression::field_before()
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{
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if( !is_first_field )
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{
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if( output_type == MORM_OUTPUT_TYPE_JSON )
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{
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(*out_stream) << ",";
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}
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else
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if( output_type == MORM_OUTPUT_TYPE_DB_INSERT ||
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output_type == MORM_OUTPUT_TYPE_DB_UPDATE )
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{
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(*out_stream) << ",";
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}
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else
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if( output_type == MORM_OUTPUT_TYPE_DB_PRIMARY_KEY )
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{
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(*out_stream) << " AND ";
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}
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}
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}
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void Expression::field_after()
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{
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is_first_field = false;
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}
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//void Expression::field(const wchar_t * field_name, Model & field, bool insertable = true, bool updatable = true)
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//{
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// // IMPLEMENT ME
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//}
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void Expression::put_field_name(const wchar_t * field_name)
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{
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before_field_name();
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field_name_raw(field_name);
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after_field_name();
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}
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void Expression::before_field_name()
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{
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if( output_type == MORM_OUTPUT_TYPE_JSON )
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{
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(*out_stream) << "\"";
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}
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}
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void Expression::after_field_name()
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{
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if( output_type == MORM_OUTPUT_TYPE_JSON )
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{
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(*out_stream) << "\"";
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}
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}
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void Expression::before_field_value_string()
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{
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if( output_type == MORM_OUTPUT_TYPE_JSON )
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{
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(*out_stream) << "\"";
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}
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else
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if( output_type == MORM_OUTPUT_TYPE_DB_INSERT ||
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output_type == MORM_OUTPUT_TYPE_DB_UPDATE ||
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output_type == MORM_OUTPUT_TYPE_DB_PRIMARY_KEY )
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{
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if( db_type == MORM_DB_TYPE_POSTGRESQL )
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{
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(*out_stream) << "E'";
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}
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}
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}
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void Expression::after_field_value_string()
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{
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if( output_type == MORM_OUTPUT_TYPE_JSON )
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{
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(*out_stream) << "\"";
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}
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else
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if( output_type == MORM_OUTPUT_TYPE_DB_INSERT ||
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output_type == MORM_OUTPUT_TYPE_DB_UPDATE ||
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output_type == MORM_OUTPUT_TYPE_DB_PRIMARY_KEY )
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{
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if( db_type == MORM_DB_TYPE_POSTGRESQL )
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{
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(*out_stream) << "'";
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}
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}
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}
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void Expression::before_field_value(const std::wstring &)
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{
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before_field_value_string();
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}
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void Expression::before_field_value(const std::string &)
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{
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before_field_value_string();
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}
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void Expression::after_field_value(const std::wstring &)
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{
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after_field_value_string();
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}
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void Expression::after_field_value(const std::string &)
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{
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after_field_value_string();
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}
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void Expression::field_name_raw(const wchar_t * field_name)
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{
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// IMPROVE ME
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// provide esc_field and esc_value methods
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esc(field_name, *out_stream);
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}
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void Expression::field_value_raw(const std::wstring & field_value)
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{
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// IMPROVE ME
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// provide esc_field and esc_value methods
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esc(field_value, *out_stream);
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}
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void Expression::field_value_raw(long field_value)
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{
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// may it should be moved to escaper?
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(*out_stream) << field_value;
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}
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void Expression::field_value_raw(int field_value)
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{
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// may it should be moved to escaper?
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(*out_stream) << field_value;
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}
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void Expression::to_json(PT::TextStream & stream, Model & model)
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{
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work_mode = MORM_WORK_MODE_MODEL_FIELDS_VALUES;
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output_type = MORM_OUTPUT_TYPE_JSON;
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out_stream = &stream;
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this->model = &model;
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generate_from_model();
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}
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void Expression::insert(PT::TextStream & stream, Model & model, int db_type)
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{
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out_stream = &stream;
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output_type = MORM_OUTPUT_TYPE_DB_INSERT;
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this->db_type = db_type;
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this->model = &model;
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stream << "insert into ";
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this->model->table_name(stream);
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stream << " (";
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work_mode = MORM_WORK_MODE_MODEL_FIELDS;
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generate_from_model();
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stream << ") values (";
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work_mode = MORM_WORK_MODE_MODEL_VALUES;
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generate_from_model();
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stream << ")";
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}
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void Expression::update(PT::TextStream & stream, Model & model, int db_type)
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{
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out_stream = &stream;
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this->db_type = db_type;
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this->model = &model;
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stream << "update ";
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this->model->table_name(stream);
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stream << " set (";
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work_mode = MORM_WORK_MODE_MODEL_FIELDS;
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output_type = MORM_OUTPUT_TYPE_DB_UPDATE;
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generate_from_model();
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stream << ") values (";
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work_mode = MORM_WORK_MODE_MODEL_VALUES;
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output_type = MORM_OUTPUT_TYPE_DB_UPDATE;
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generate_from_model();
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stream << ") where ";
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work_mode = MORM_WORK_MODE_MODEL_FIELDS_VALUES;
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output_type = MORM_OUTPUT_TYPE_DB_PRIMARY_KEY;
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generate_from_model();
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}
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/*
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template<typename Container>
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void field_container(const wchar_t * field_name, Container container, bool insertable = true, bool updatable = true)
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{
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typename Container::value Value; // czy tu jest Container::value? sprawdzic
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if( !is_first_field )
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(*out_stream) << ",";
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if( work_mode == ORM_STREAM_MODE_CREATING_JSON )
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{
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(*out_stream) << "[";
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boolean is_first = true;
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for(Value v : container)
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{
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if( !is_first )
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(*out_stream) << ",";
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v.map_fields(this);
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is_first = false;
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}
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(*out_stream) << "]";
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}
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// a co z bazą danych?
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is_first_field = false;
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}
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*/
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} // namespace
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