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/*
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* Copyright (C) 2015 Christian Ehringfeld <c.ehringfeld@t-online.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "entitymanager.h"
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#include "enums/databasetype.h"
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#include "databasemigration.h"
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using namespace CuteEntityManager;
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QStringList EntityManager::connectionNames = QStringList();
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void EntityManager::init() {
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auto schema = Database::getSchema(Database::getDatabaseType(
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this->db.data()->getDatabase().driverName()), this->db);
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this->schema = QSharedPointer<Schema>(schema);
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this->schema.data()->setTables(this->schema.data()->getTableSchemas());
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}
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EntityManager::EntityManager(QSqlDatabase database) {
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auto db = new Database(database);
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this->db = QSharedPointer<Database>(db);
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this->init();
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}
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bool EntityManager::startup(QString version, QStringList toInitialize) {
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DatabaseMigration *dbm = new DatabaseMigration();
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QSharedPointer<Entity> ptrDbm = QSharedPointer<Entity>(dbm);
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QHash<QString, QVariant> map = QHash<QString, QVariant>();
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bool ok = true;
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map.insert("version", version);
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if (this->findAllByAttributes(map, dbm->getTablename()).isEmpty()) {
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for (int var = 0; var < toInitialize.size(); ++var) {
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if (ok) {
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QString c = toInitialize.at(var);
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ok = this->createTable(QSharedPointer<Entity>(EntityInstanceFactory::createInstance(c)));
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} else {
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break;
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}
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}
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if (ok) {
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dbm->setVersion(version);
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dbm->setApplyTime(QDateTime::currentDateTime());
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this->create(ptrDbm);
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}
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}
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delete dbm;
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return ok;
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}
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EntityManager::EntityManager(const QString &databaseType, QString databasename , QString hostname, QString username,
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QString password, QString port) {
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auto db = new Database(databaseType, this->createConnection(), hostname, databasename, username, password,
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port.toInt());
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this->db = QSharedPointer<Database>(db);
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this->init();
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}
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bool EntityManager::checkTable(const QSharedPointer<Entity> &entity) {
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bool rc = true;
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if (!this->schema.data()->containsTable(entity.data()->getTablename())) {
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if (this->schema.data()->getQueryBuilder().data()->createTable(entity)) {
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this->schema.data()->getTableSchema(entity.data()->getTablename(), true);
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rc = this->schema.data()->getTables().contains(entity.data()->getTablename());
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}
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}
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return rc;
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}
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QSharedPointer<Database> EntityManager::getDb() const {
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return db;
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}
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void EntityManager::setDb(const QSharedPointer<Database> &value) {
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db = value;
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}
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QSharedPointer<Schema> EntityManager::getSchema() const {
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return schema;
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}
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void EntityManager::setSchema(const QSharedPointer<Schema> &value) {
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schema = value;
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}
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QString EntityManager::createConnection() {
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QStringList l = EntityManager::getConnectionNames();
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QString conName = "";
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bool ok = false;
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qint16 i = 0;
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while (!ok) {
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if (l.contains("con" + QString::number(i))) {
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++i;
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} else {
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l.append("con" + QString::number(i));
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ok = true;
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conName = "con" + QString::number(i);
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EntityManager::setConnectionNames(l);
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}
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}
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return conName;
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}
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void EntityManager::removeConnectionName(const QString &name) {
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EntityManager::connectionNames.removeOne(name);
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}
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QSharedPointer<Entity> EntityManager::findById(const qint64 &id, Entity *&e) {
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QSharedPointer<Entity> r;
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if (e) {
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if ((r = this->cache.get(id, QString(e->getClassname()))) && !r.data()) {
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auto map = this->findByPk(id, e->getTablename());
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r = this->convert(map, e->getClassname());
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}
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delete e;
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}
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return r;
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}
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QSharedPointer<Entity> EntityManager::findById(const qint64 &id, const QString &classname) {
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Entity *e = EntityInstanceFactory::createInstance(classname);
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return this->findById(id, e);
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}
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QSharedPointer<Entity> EntityManager::convert(const QHash<QString, QVariant> &map, const char *classname) {
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auto ptr = QSharedPointer<Entity>(EntityInstanceFactory::createInstance(classname, map));
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this->cache.insert(ptr);
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return ptr;
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}
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QList<QSharedPointer<Entity> > EntityManager::convert(QList<QHash<QString, QVariant> > maps, const char *classname) {
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auto list = QList<QSharedPointer<Entity> >();
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for (int var = 0; var < maps.size(); ++var) {
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auto ptr = this->convert(maps.at(var), classname);
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list.append(ptr);
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this->cache.insert(ptr);
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}
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return list;
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}
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void EntityManager::manyToOne(const QSharedPointer<Entity> &entity, const QVariant &id, const QMetaProperty &property) {
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qint64 convertedId = -1;
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bool ok = false;
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if ((convertedId == id.toLongLong(&ok)) && ok && convertedId > -1) {
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QString className = EntityInstanceFactory::extractEntityType(property.typeName());
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QSharedPointer<Entity> ptr = QSharedPointer<Entity>();
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if (this->cache.contains(convertedId, className) && (ptr = this->cache.get(convertedId, className)) && ptr.data()) {
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} else {
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ptr = this->findById(convertedId, className);
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}
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if (ptr.data() && ptr.data()->getId() > -1) {
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property.write(entity.data(), QVariant(ptr));
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}
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}
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}
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void EntityManager::oneToMany(const QSharedPointer<Entity> &entity, const Relation &r, const QMetaProperty &property) {
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if (entity.data() && entity.data()->getId() > -1) {
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Entity *e = EntityInstanceFactory::createInstance(EntityInstanceFactory::extractEntityType(property.typeName()));
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->oneToMany(e->getTablename(),
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r.getMappedBy() + "_id", entity.data()->getId());
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auto listMap = this->convertQueryResult(q);
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auto entities = this->convert(listMap, e->getClassname());
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delete e;
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this->setListProperty(entity, entities, property);
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}
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}
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void EntityManager::setListProperty(const QSharedPointer<Entity> &entity, QList<QSharedPointer<Entity> > &list,
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const QMetaProperty &property) const {
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QVariant var;
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var.setValue<QList<QSharedPointer<Entity>>>(list);
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property.write(entity.data(), var);
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}
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void EntityManager::manyToMany(const QSharedPointer<Entity> &entity, const Relation &r, const QMetaProperty &property) {
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Entity *secEntity = EntityInstanceFactory::createInstance(EntityInstanceFactory::extractEntityType(QString(
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property.typeName())));
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auto builder = this->schema.data()->getQueryBuilder();
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if (secEntity) {
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QSharedPointer<Entity> secEntityPtr = QSharedPointer<Entity>(secEntity);
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QString tblName = "";
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if (r.getMappedBy().isEmpty()) {
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tblName = builder.data()->generateManyToManyTableName(entity, secEntityPtr);
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} else {
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tblName = builder.data()->generateManyToManyTableName(secEntityPtr, entity);
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}
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/**
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* maybe it would be better, to fetch first the ids, look up cache and then request missing entities
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*/
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->manyToMany(tblName,
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builder.data()->generateManyToManyColumnName(entity), entity.data()->getId(),
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builder.data()->generateManyToManyColumnName(secEntityPtr),
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secEntityPtr.data()->getTablename());
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auto listMap = this->convertQueryResult(q);
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auto entities = this->convert(listMap, entity.data()->getClassname());
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this->setListProperty(entity, entities, property);
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}
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}
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void EntityManager::oneToOne(const QSharedPointer<Entity> &entity, const Relation &r, const QMetaProperty &property,
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const QVariant &id) {
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}
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QList<QSharedPointer<Entity> > EntityManager::findEntityByAttributes(const QSharedPointer<Entity> &entity,
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bool ignoreID) {
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auto maps = this->findAllByAttributes(entity, ignoreID);
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return this->convert(maps, entity.data()->getClassname());
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}
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/**
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* @todo should be an insert statement with much values
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* not really usefull atm
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* @brief EntityManager::create
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* @param entities
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* @return
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*/
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bool EntityManager::create(QList<QSharedPointer<Entity> > entities) {
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bool ok = true;
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foreach (QSharedPointer<Entity> ent, entities) {
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ok = this->create(ent);
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if (!ok) {
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break;
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}
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}
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return ok;
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}
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/**
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* @TODO insert Relations
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* @brief EntityManager::create
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* @param entity
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* @return
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*/
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bool EntityManager::create(QSharedPointer<Entity> &entity) {
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bool rc = false;
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if (this->checkTable(entity) && this->count(entity) == 0) {
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->create(entity);
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rc = this->db->transaction(q);
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if (rc) {
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entity.data()->setId(this->schema.data()->getLastInsertID().toLongLong(&rc));
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this->cache.insert(entity);
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}
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}
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return rc;
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}
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EntityManager::~EntityManager() {
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EntityManager::removeConnectionName(this->db->getConnectionName());
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}
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QStringList EntityManager::getConnectionNames() {
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return EntityManager::connectionNames;
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}
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QHash<QString, QVariant> EntityManager::findByPk(qint64 id, QString tblname) {
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->find(id, tblname);
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auto listMap = this->convertQueryResult(q);
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if (!listMap.isEmpty()) {
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return listMap.at(0);
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}
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// this->db->select(q);
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// QSqlRecord rec = q.record();
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// QHash<QString, QVariant> map = QHash<QString, QVariant>();
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// if (q.next()) {
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// for (int var = 0; var < rec.count(); ++var) {
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// QVariant variant = rec.value(var);
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// if (variant.isValid()) {
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// map.insert(rec.fieldName(var), variant);
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// }
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// }
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// }
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// return map;
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return QHash<QString, QVariant>();
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}
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QList<QHash<QString, QVariant> > EntityManager::findAllByAttributes(const QSharedPointer<Entity> &entity,
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bool ignoreID) {
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->findByAttributes(entity, ignoreID);
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return this->convertQueryResult(q);
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}
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QList<QHash <QString, QVariant> > EntityManager::findAllByAttributes(const QHash<QString, QVariant> &m,
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const QString &tblname,
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bool ignoreID) {
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->findByAttributes(m,
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tblname, ignoreID);
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return this->convertQueryResult(q);
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}
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/**
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* @TODO insert Relations
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* @brief EntityManager::merge
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* @param entity
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* @param withRelations
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* @return
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*/
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bool EntityManager::merge(QSharedPointer<Entity> &entity, bool withRelations) {
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if (this->count(entity) == 0 && entity->getId() != -1) {
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->merge(entity);
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return this->db->transaction(q);
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} else {
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return false;
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}
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}
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QList<QHash<QString, QVariant> > EntityManager::convertQueryResult(QSqlQuery &q) {
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QList<QHash <QString, QVariant> > listmap = QList<QHash <QString, QVariant> >();
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this->db->select(q);
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QSqlRecord rec = q.record();
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QStringList l = QStringList();
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qint16 field_count = rec.count();
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for (int var = 0; var < field_count; ++var) {
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l.append(rec.fieldName(var));
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}
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QHash<QString, QVariant> map = QHash<QString, QVariant>();
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while (q.next()) {
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for (int var = 0; var < field_count; ++var) {
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map.insert(l.at(var), q.value(rec.indexOf(l.at(var))));
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}
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listmap.append(map);
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}
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return listmap;
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}
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QList<QHash <QString, QVariant> > EntityManager::findAll(QString tblname) {
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->findAll(tblname);
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return this->convertQueryResult(q);
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}
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void EntityManager::resolveRelations(const QSharedPointer<Entity> &entity, const QHash<QString, QVariant> &map) {
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auto props = entity.data()->getRelationProperties();
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auto iterator = props.constBegin();
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while (iterator != props.constEnd()) {
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const Relation r = iterator.key();
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const QMetaProperty property = iterator.value();
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switch (r.getType()) {
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case MANY_TO_ONE:
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if (map.contains(r.getPropertyName()) + "_id") {
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this->manyToOne(entity, property.read(entity.data()), property);
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}
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break;
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case MANY_TO_MANY:
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this->manyToMany(entity, r, property);
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break;
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case ONE_TO_MANY:
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this->oneToMany(entity, r, property);
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break;
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case ONE_TO_ONE:
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this->oneToOne(entity, r, property, property.read(entity.data()));
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break;
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}
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++iterator;
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}
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}
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bool EntityManager::save(QSharedPointer<Entity> &entity) {
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if (entity.data()->getId() > -1) {
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return this->merge(entity);
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} else {
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return this->create(entity);
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}
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}
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qint64 EntityManager::findId(QSharedPointer<Entity> &entity) {
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qint64 r = -1;
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->findId(entity);
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this->db->select(q);
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if (q.next()) {
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r = q.value(0).toLongLong();
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}
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return r;
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}
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bool EntityManager::remove(QSharedPointer<Entity> &entity) {
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bool rc = false;
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->remove(entity);
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if (this->db->transaction(q)) {
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this->cache.remove(entity);
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entity.clear();
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rc = true;
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}
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return rc;
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}
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bool EntityManager::createTable(const QSharedPointer<Entity> &entity) {
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return this->schema.data()->getQueryBuilder().data()->createTable(entity);
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}
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qint8 EntityManager::count(const QSharedPointer<Entity> &entity, bool ignoreID) {
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qint8 rc = -1;
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->count(entity, ignoreID);
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this->db->select(q);
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if (q.next()) {
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rc = q.value(0).toInt();
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}
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return rc;
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}
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qint8 EntityManager::count(const QString &tableName) {
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qint8 rc = -1;
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QSqlQuery q = this->schema.data()->getQueryBuilder().data()->count(tableName);
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this->db->select(q);
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if (q.next()) {
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rc = q.value(0).toInt();
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}
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return rc;
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}
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void EntityManager::setConnectionNames(QStringList list) {
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EntityManager::connectionNames = list;
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}
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