671 lines
12 KiB
C++
671 lines
12 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) 2018-2019, 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 "model.h"
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namespace morm
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{
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Model::Model()
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{
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model_connector = nullptr;
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model_env = nullptr;
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save_mode = DO_INSERT_ON_SAVE;
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}
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Model::Model(const Model & m)
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{
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model_connector = m.model_connector;
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save_mode = m.save_mode;
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model_env = m.model_env; // or just set to null?
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}
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Model::~Model()
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{
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}
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void Model::set_save_mode(SaveMode save_mode)
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{
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this->save_mode = save_mode;
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}
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Model::SaveMode Model::get_save_mode()
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{
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return save_mode;
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}
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void Model::mark_to_delete()
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{
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save_mode = DO_DELETE_ON_SAVE;
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}
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void Model::mark_to_remove()
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{
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save_mode = DO_DELETE_ON_SAVE;
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}
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void Model::mark_to_insert()
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{
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save_mode = DO_INSERT_ON_SAVE;
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}
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void Model::mark_to_update()
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{
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save_mode = DO_UPDATE_ON_SAVE;
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}
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void Model::table_name(PT::TextStream & stream)
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{
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}
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void Model::set_connector(ModelConnector & connector)
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{
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set_connector(&connector);
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}
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void Model::set_connector(ModelConnector * connector)
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{
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model_connector = connector;
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}
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bool Model::object_exists()
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{
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return save_mode == DO_UPDATE_ON_SAVE;
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}
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bool Model::found()
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{
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return save_mode == DO_UPDATE_ON_SAVE;
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}
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void Model::to_text(PT::TextStream & stream, ModelData * model_data, bool clear_stream)
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{
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if( clear_stream )
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{
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stream.clear();
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}
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_FLAT_STRING;
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if( model_connector )
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{
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FlatConnector * flat_connector = model_connector->get_flat_connector();
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if( flat_connector )
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{
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model_env->model_data = model_data;
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flat_connector->to_text(stream, *this);
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model_env->model_data = nullptr;
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}
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}
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// what about if an exception was thrown? this pointer will not be null
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model_env = nullptr;
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}
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void Model::to_text(PT::TextStream & stream, ModelData & model_data, bool clear_stream)
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{
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to_text(stream, &model_data, clear_stream);
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}
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void Model::to_text(PT::TextStream & stream, bool clear_stream)
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{
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to_text(stream, nullptr, clear_stream);
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}
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void Model::to_text(std::string & str, ModelData * model_data, bool clear_string)
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{
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if( model_connector )
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{
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// CHECK ME what if the stream is being used by something other?
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PT::TextStream * out_stream = model_connector->get_stream();
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if( out_stream )
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{
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to_text(*out_stream, model_data, true);
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out_stream->to_string(str, clear_string);
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}
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}
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}
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void Model::to_text(std::string & str, ModelData & model_data, bool clear_string)
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{
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to_text(str, &model_data, clear_string);
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}
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void Model::to_text(std::string & str, bool clear_string)
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{
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to_text(str, nullptr, clear_string);
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}
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std::string Model::to_text()
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{
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std::string str;
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to_text(str, false);
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return str;
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}
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std::string Model::to_string()
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{
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return to_text();
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}
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void Model::generate_insert_query(PT::TextStream & stream, ModelData * model_data)
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{
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_data = model_data;
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DB_SQL;
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if( model_connector )
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{
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DbConnector * db_connector = model_connector->get_db_connector();
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if( db_connector )
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{
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db_connector->generate_insert_query(stream, *this);
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}
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}
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// what about if an exception was thrown? this pointer will not be null
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model_env = nullptr;
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}
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bool Model::insert(ModelData * model_data, bool insert_whole_tree)
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{
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_data = model_data;
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bool status = insert_tree(insert_whole_tree);
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// what about if an exception was thrown? this pointer will not be null
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model_env = nullptr;
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return status;
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}
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// has ModelEnv set
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bool Model::insert_tree(bool insert_whole_tree)
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{
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bool result = false;
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if( insert_whole_tree )
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{
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_ITERATE_THROUGH_CHILDS_AND_INSERT;
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map_fields();
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}
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if( model_connector )
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{
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DB_SQL;
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DbConnector * db_connector = model_connector->get_db_connector();
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// CHECK ME what if the stream is being used by something other?
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PT::TextStream * out_stream = model_connector->get_stream();
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if( db_connector && out_stream )
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{
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before_insert();
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out_stream->clear();
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result = db_connector->insert(*out_stream, *this);
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if( result )
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{
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save_mode = DO_UPDATE_ON_SAVE; // IMPROVE ME check if there is a primary key
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after_insert();
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set_parent_key_in_childs();
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}
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else
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{
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after_insert_failure();
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}
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}
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}
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if( insert_whole_tree )
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{
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_ITERATE_THROUGH_CHILDS_AND_INSERT_XXX;
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map_fields();
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}
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return result;
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}
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bool Model::insert(ModelData & model_data, bool insert_whole_tree)
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{
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return insert(&model_data, insert_whole_tree);
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}
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void Model::generate_update_query(PT::TextStream & stream, ModelData * model_data)
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{
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_data = model_data;
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DB_SQL;
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if( model_connector )
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{
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DbConnector * db_connector = model_connector->get_db_connector();
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if( db_connector )
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{
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db_connector->generate_update_query(stream, *this);
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}
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}
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// what about if an exception was thrown? this pointer will not be null
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model_env = nullptr;
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}
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bool Model::update(ModelData * model_data)
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{
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bool result = false;
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if( model_connector )
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{
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_data = model_data;
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DB_SQL;
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DbConnector * db_connector = model_connector->get_db_connector();
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// CHECK ME what if the stream is being used by something other?
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PT::TextStream * out_stream = model_connector->get_stream();
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if( db_connector && out_stream )
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{
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before_update();
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out_stream->clear();
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result = db_connector->update(*out_stream, *this);
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if( result )
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after_update();
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else
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after_update_failure();
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}
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// what about if an exception was thrown? this pointer will not be null
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model_env = nullptr;
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}
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return result;
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}
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bool Model::update(ModelData & model_data)
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{
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return update(&model_data);
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}
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void Model::generate_remove_query(PT::TextStream & stream, ModelData * model_data)
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{
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_data = model_data;
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DB_SQL;
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if( model_connector )
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{
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DbConnector * db_connector = model_connector->get_db_connector();
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if( db_connector )
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{
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db_connector->generate_remove_query(stream, *this);
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}
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}
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// what about if an exception was thrown? this pointer will not be null
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model_env = nullptr;
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}
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bool Model::remove(ModelData * model_data)
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{
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bool result = false;
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if( model_connector )
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{
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_data = model_data;
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DB_SQL;
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DbConnector * db_connector = model_connector->get_db_connector();
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// CHECK ME what if the stream is being used by something other?
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PT::TextStream * out_stream = model_connector->get_stream();
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if( db_connector && out_stream )
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{
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before_remove();
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out_stream->clear();
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result = db_connector->remove(*out_stream, *this);
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if( result )
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{
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save_mode = DO_INSERT_ON_SAVE;
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after_remove();
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}
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else
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{
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after_remove_failure();
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}
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}
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// what about if an exception was thrown? this pointer will not be null
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model_env = nullptr;
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}
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return result;
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}
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bool Model::remove(ModelData & model_data)
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{
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return remove(&model_data);
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}
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bool Model::save(ModelData * model_data)
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{
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bool result = false;
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switch( save_mode )
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{
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case DO_DELETE_ON_SAVE:
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result = remove(model_data);
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break;
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case DO_INSERT_ON_SAVE:
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result = insert(model_data);
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break;
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case DO_UPDATE_ON_SAVE:
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result = update(model_data);
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break;
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case DO_NOTHING_ON_SAVE:
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result = true;
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break;
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}
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return result;
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}
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bool Model::save(ModelData & model_data)
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{
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return save(&model_data);
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}
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void Model::generate_select_columns(PT::TextStream & stream)
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{
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if( model_connector && model_env )
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{
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DB_SQL;
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DbConnector * db_connector = model_connector->get_db_connector();
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if( db_connector )
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{
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db_connector->generate_select_columns(stream, *this);
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}
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}
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}
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void Model::generate_doc_for_flat(PT::TextStream & stream, bool clear_stream)
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{
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if( clear_stream )
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{
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stream.clear();
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}
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DOC_FOR_FLAT;
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if( model_connector )
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{
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FlatConnector * flat_connector = model_connector->get_doc_connector(); // different connector will be here
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if( flat_connector )
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{
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flat_connector->to_text(stream, *this);
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}
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}
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_NONE;
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}
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void Model::generate_doc_for_db(PT::TextStream & stream, bool clear_stream)
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{
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if( clear_stream )
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{
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stream.clear();
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}
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_GENERATING_DOC_FOR_DB;
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if( model_connector )
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{
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FlatConnector * flat_connector = model_connector->get_doc_connector(); // different connector will be here
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if( flat_connector )
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{
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flat_connector->to_text(stream, *this);
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}
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}
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_NONE;
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}
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void Model::map_values_from_query()
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{
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if( model_env )
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{
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_READING_VALUE_FROM_DB_RESULTSET;
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map_fields();
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_NONE;
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}
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}
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void Model::clear()
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{
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ModelEnv model_env_local;
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model_env = &model_env_local;
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model_env->model_connector_mode = MORM_MODEL_CONNECTOR_MODE_CLEARING_VALUE;
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map_fields();
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model_env = nullptr;
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save_mode = DO_INSERT_ON_SAVE;
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}
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void Model::before_select()
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{
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}
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void Model::before_insert()
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{
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}
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void Model::before_update()
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{
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}
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void Model::before_remove()
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{
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}
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void Model::after_select()
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{
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}
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void Model::after_insert()
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{
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}
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void Model::after_update()
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{
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}
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void Model::after_remove()
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{
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}
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void Model::after_select_failure()
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{
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}
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void Model::after_insert_failure()
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{
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}
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void Model::after_update_failure()
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{
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}
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void Model::after_remove_failure()
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{
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}
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int Model::get_connector_mode()
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{
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if( model_env )
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{
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return model_env->model_connector_mode;
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}
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else
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{
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return MORM_MODEL_CONNECTOR_MODE_NONE;
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}
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}
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ModelData * Model::get_model_data()
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{
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if( model_env )
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{
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return model_env->model_data;
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}
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else
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{
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return nullptr;
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}
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}
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bool Model::is_empty_field(const wchar_t * value)
|
|
{
|
|
return (!value || *value == '\0');
|
|
}
|
|
|
|
|
|
bool Model::is_the_same_field(const wchar_t * field1, const wchar_t * field2)
|
|
{
|
|
if( !field1 && !field2 )
|
|
return true;
|
|
|
|
if( !field1 || !field2 )
|
|
return false;
|
|
|
|
bool the_same = false;
|
|
|
|
while( *field1 && *field2 )
|
|
{
|
|
field1 += 1;
|
|
field2 += 1;
|
|
}
|
|
|
|
if( *field1 == 0 && *field2 == 0 )
|
|
{
|
|
the_same = true;
|
|
}
|
|
|
|
return the_same;
|
|
}
|
|
|
|
|
|
} // namespace
|
|
|