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root/src/querybuilder.h @ afde9013

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/*
* Copyright (C) 2015 Christian Ehringfeld <c.ehringfeld@t-online.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
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#ifndef QUERYBUILDER_H
#define QUERYBUILDER_H
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#include <QString>
#include <QHash>
#include <QSharedPointer>
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#include <QPointer>
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#include <QSqlQuery>
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#include <QStringList>
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#include <QMetaProperty>
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#include "relation.h"
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namespace CuteEntityManager {
class Schema;
class Entity;
class Database;
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enum DbForeignKeyCascade {
RESTRICT,
CASCADE,
NO_ACTION,
SET_DEFAULT,
SET_NULL,
};

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class QueryBuilder {
public:
QueryBuilder(QSharedPointer<Schema> schema, QSharedPointer<Database> database);
virtual ~QueryBuilder();
virtual bool createTable(const QSharedPointer<Entity> &entity) const;
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virtual bool createIndices(const QSharedPointer<Entity> &entity) const;
virtual QString createTable(const QString &tableName,
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const QHash<QString, QString> &tableDefinition) const;
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virtual QString createTableQuery(const QString &tableName,
const QHash<QString, QString> &tableDefinition) const;
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virtual QString renameTable(QString tableName, QString newName) const;
virtual QString dropTable(QString tableName) const;
virtual QString truncateTable(QString tableName) const;
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virtual QString addColumn(QString tableName, QString columnName,
QString columnType) const;
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virtual QString dropColumn(QString tableName, QString columName)const;
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virtual QString renameColumn(QString tableName, QString oldName,
QString newName) const;
virtual QString alterColumn(QString tableName, QString columnName,
QString newType)const;
virtual QString addPrimaryKey(QString name, QString tableName,
QStringList columns)const;
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virtual QString dropPrimaryKey(QString name, QString tableName) const;
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virtual QString addForeignKey(QString name, QString tableName,
QStringList columns,
QString refTableName,
QStringList refColumns, QString deleteConstraint,
QString updateConstraint) const;
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QString generateIndexName(const QString &name, const QString &table,
const QString &refColumn, const QString &refTable, const bool fk) const;
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QString generateColumnNameID(QString name) const;
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virtual QString getForeignKeyCascade(DbForeignKeyCascade cascade) const;
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virtual QString dropForeignKey(QString name, QString tableName) const;
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virtual QString createIndex(QString name, QString tableName,
QStringList columns,
bool unique)const;
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virtual QString dropIndex(QString name, QString tableName)const;
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virtual QString createFkSuperClass(const Entity *e) const;
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QHash<QString, QVariant> getEntityAttributes(const QHash<QString, QMetaProperty>
&props,
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const QSharedPointer<Entity> &entity) const;
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virtual QStringList relationFks(const QSharedPointer<Entity> &entity) const;
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virtual bool supportsForeignKeys() const;
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virtual QString createForeignKeyManyToMany(const QString &tableName,
const QSharedPointer<Entity> &entity, const QString &update,
const QString &remove) const;
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QSharedPointer<Schema> getSchema() const;
void setSchema(const QSharedPointer<Schema> &value);
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QSharedPointer<Database> getDatabase() const;
void setDatabase(const QSharedPointer<Database> &value);
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QHash<QString, QHash<QString, QString>> generateRelationTables(
const QSharedPointer<Entity> &entity)
const;
QHash<QString, QString> generateTableDefinition(const QSharedPointer<Entity>
&entity)
const;
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QString generateManyToManyTableName(const QSharedPointer<Entity> &firstEntity,
const QSharedPointer<Entity> &secondEntity) const;
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QString transformTypeToAbstractDbType(QString typeName) const;
QString transformAbstractTypeToRealDbType(QString typeName) const;
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QString getColumnType(const QString &type) const;
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QSqlQuery find(const qint64 &id, const QString &tableName) const;
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QSqlQuery find(const qint64 &id, const QSharedPointer<Entity> &entity,
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qint64 offset = 0, QString pk = "id") const;
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QSqlQuery findByAttributes(const QHash<QString, QVariant> &m,
const QString &tableName,
const bool &ignoreID = true, const qint64 limit = 0,
const qint64 offset = 0) const;
QSqlQuery findByAttributes(const QSharedPointer<Entity> &e,
bool ignoreID = true,
const qint64 limit = 0, const qint64 offset = 0);
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QSqlQuery findAll(const QString &tableName) const;
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QSqlQuery findAll(const QSharedPointer<Entity> &entity, const qint64 limit = 0,
qint64 offset = 0);
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QList<QSqlQuery> remove(const QSharedPointer<Entity> &entity) const;
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QSqlQuery findId(const QSharedPointer<Entity> &entity) const;
QSqlQuery count(const QSharedPointer<Entity> &entity, bool ignoreID) const;
QSqlQuery count(const QString &tableName) const;
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QList<QSqlQuery> merge(const QSharedPointer<Entity> &entity) const;
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QList<QSqlQuery> create(const QSharedPointer<Entity> &entity) const;
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QSqlQuery oneToMany(const QString &tableName, const QString &attribute,
const qint64 &id,
const qint64 &limit = 0);
QSqlQuery manyToMany(const QString &tableName, const QString &attribute,
const qint64 &id,
const QString &foreignKey,
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const QString &foreignTable);
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QSqlQuery manyToManyDelete(const QString &tableName, const QString &attribute,
const qint64 &id);
QSqlQuery manyToManyInsert(const QString &tableName, const QString &col1,
const QString &col2) const;

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virtual QString limit(const qint64 &limit, const qint64 &offset) const;
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QString generateManyToManyColumnName(const QSharedPointer<Entity> &entity)
const;
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QSqlQuery getQuery() const;
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protected:
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class ClassAttributes {
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public:
ClassAttributes() { }
explicit ClassAttributes(const QString name,
const QHash<QString, QVariant> attributes, QString pk = "id");
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QString getName() const;
void setName(const QString &value);

QHash<QString, QVariant> getAttributes() const;
void setAttributes(const QHash<QString, QVariant> &value);

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QString getPk() const;
void setPk(const QString &value);

private:
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QString name;
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QString pk;
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QHash<QString, QVariant> attributes;
};

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QSqlQuery remove(const QString &tableName, const qint64 &id,
const QString &primaryKey = "id") const;
QSqlQuery insert(const QString &tableName, QHash<QString, QVariant> &attributes,
const QString &primaryKey = "id") const;
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QSqlQuery update(const QString &tableName, QHash<QString, QVariant> &attributes,
const QString &primaryKey = "id") const;
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virtual void createRelationFK(QStringList &queries,
const QSharedPointer<Entity> &entity, const Relation &relation,
const QMetaProperty &metaProperty, const QString &update,
const QString &remove) const;
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void insertRelationId(const Entity *e, QHash<QString, QVariant> &map,
QString relName) const;
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QString buildColumns(const QStringList &columns) const;
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QHash<QString, QVariant> getManyToOneAttributes(QHash<QString, QMetaProperty>
props,
const QSharedPointer<Entity> &entity,
QHash<QString, Relation> relations = QHash<QString, Relation>()) const;
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QHash<QString, QMetaProperty> getMetaProperties(const QSharedPointer<Entity>
&entity)
const;
QHash<QString, QVariant> getPropertyValues(const QHash<QString, QMetaProperty>
&metaProps,
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const QSharedPointer<Entity> &entity) const;
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QString buildCreateQuery(QHash<QString, QVariant>::const_iterator i,
QHash<QString, QVariant>::const_iterator end,
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QString &p1, QString &p2) const;
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void bindValues(const QHash<QString, QVariant> &h, QSqlQuery &q,
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bool ignoreID = false, const QString &primaryKey = "id") const;
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QString where(const QSharedPointer<Entity> &entity, QString conjunction = ",",
bool ignoreID = false) const;
QString where(const QHash<QString, QVariant> &m,
const QString &conjunction = ",",
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bool ignoreID = false, const QString &primaryKey = "id") const;
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QString attributes(const QHash<QString, QVariant> &m,
const QString &conjunction = ",",
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bool ignoreID = false, const QString &primaryKey = "id") const;
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QHash<QString, QVariant> saveAttributes(const QSharedPointer<Entity> &entity,
QHash<QString, QMetaProperty> props = QHash<QString, QMetaProperty> (),
QHash<QString, Relation> relations = QHash<QString, Relation>())
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const;
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QHash<QString, QMetaProperty> processProperties(const QSharedPointer<Entity> &e,
QHash<QString, QMetaProperty> &usedProperties) const;
QHash<QString, Relation> processRelations(const QSharedPointer<Entity> &e,
QHash<QString, Relation> &usedRelations) const;
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QList<ClassAttributes> inheritedAttributes(
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const QSharedPointer<Entity> &entity) const;
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QString leftJoin(const QString &foreignTable, const QString &tableName,
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const QString &foreignKey = "id", const QString &primaryKey = "id") const;
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QString superClassColumnName(const QMetaObject *&superMeta) const;
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QString joinSuperClasses(const QSharedPointer<Entity> &entity) const;
virtual QString selectBase(const QStringList &tables,
const QStringList &columns = QStringList()) const;
virtual QString countFunction(const QString &distinctColumn = "") const;
virtual QString distinct() const;

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QSharedPointer<Schema> schema;
QSharedPointer<Database> database;
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};
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}
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#endif // QUERYBUILDER_H