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root/src/querybuilder.cpp @ 9e62667d

c22391b2 Christian Ehringfeld
/*
* 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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#include "querybuilder.h"
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#include "database.h"
#include <QMetaObject>
#include "entity.h"
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#include <QRegularExpression>
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#include "entityinstancefactory.h"
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using namespace CuteEntityManager;
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QueryBuilder::QueryBuilder(QSharedPointer<Schema> schema,
QSharedPointer<Database> database) {
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this->schema = schema;
this->database = database;
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}

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QueryBuilder::~QueryBuilder() {
}

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bool QueryBuilder::createTable(const QSharedPointer<Entity> &entity,
bool createRelationTables) const {
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bool rc = false;
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if (entity.data()) {
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auto tableDefinition = this->generateTableDefinition(entity);
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QString tableName = entity->getTablename();
this->schema->containsTable(tableName) ? rc = true : rc = false;
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if (!rc) {
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QSqlQuery q = this->database->getQuery(this->createTable(tableName,
tableDefinition));
if (this->database->transaction(q)) {
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if (createRelationTables) {
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auto relTables = this->generateRelationTables(entity);
auto i = relTables.constBegin();
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while (i != relTables.constEnd()) {
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auto query = this->database->getQuery(this->createTable(i.key(),
i.value()));
this->database->exec(query);
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++i;
}
}
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this->schema->getTableSchema(tableName);
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rc = true;
if (rc) {
rc = this->createIndices(entity);
}
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}
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}
}
return rc;
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}

bool QueryBuilder::createIndices(const QSharedPointer<Entity> &entity) const {
bool ok = true;
QStringList queries = QStringList();
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QString superIndex = this->createFkSuperClass(entity.data());
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if (!superIndex.isEmpty()) {
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queries.append(superIndex);
}
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queries.append(this->relationFks(entity));
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ok = this->database->transaction(queries);
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return ok;
}

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QStringList QueryBuilder::relationFks(const QSharedPointer<Entity> &entity)
const {
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QStringList queries = QStringList();
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if (this->supportsForeignKeys()) {
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auto relations = entity->getNonInheritedRelations();
auto props = entity->getMetaProperties();
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auto iterator = relations.constBegin();
while (iterator != relations.constEnd()) {
auto relation = iterator.value();
if (relation.getMappedBy().isEmpty() && !relation.getCascadeType().isEmpty()) {
QString update = relation.getCascadeType().contains(MERGE)
|| relation.getCascadeType().contains(ALL) ? this->getForeignKeyCascade(
CASCADE) : this->getForeignKeyCascade(NO_ACTION);
QString remove = relation.getCascadeType().contains(REMOVE)
|| relation.getCascadeType().contains(ALL) ? this->getForeignKeyCascade(
CASCADE) : this->getForeignKeyCascade(SET_NULL);
this->createRelationFK(queries, entity, relation,
props.value(relation.getPropertyName()), update, remove);
}
++iterator;
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}
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}
return queries;
}

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bool QueryBuilder::supportsForeignKeys() const {
return true;
}

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void QueryBuilder::createRelationFK(QStringList &queries,
const QSharedPointer<Entity> &entity, const Relation &relation,
const QMetaProperty &metaProperty, const QString &update,
const QString &remove) const {
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auto ptr = QSharedPointer<Entity>
(EntityInstanceFactory::createInstance(metaProperty.type()));
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if (ptr) {
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if (relation.getType() == ONE_TO_ONE || relation.getType() == MANY_TO_ONE) {
QString indexName = this->generateIndexName(relation.getPropertyName(),
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entity->getTablename(),
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this->generateColumnNameID(relation.getPropertyName()),
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ptr->getTablename(), true);
queries.append(this->addForeignKey(indexName, entity->getTablename(),
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QStringList(this->generateColumnNameID(relation.getPropertyName())),
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ptr->getTablename(),
QStringList(ptr->getPrimaryKey()), remove, update));
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} else if (relation.getType() == MANY_TO_MANY) {
QString tableName = this->generateManyToManyTableName(entity, ptr);
queries.append(this->createForeignKeyManyToMany(tableName, entity, update,
remove));
queries.append(this->createForeignKeyManyToMany(tableName, ptr, update,
remove));
}
}
}

QString QueryBuilder::createForeignKeyManyToMany(const QString &tableName,
const QSharedPointer<Entity> &entity, const QString &update,
const QString &remove) const {
QString fkColumn = this->generateManyToManyColumnName(entity);
QString indexName = this->generateIndexName(fkColumn,
tableName, fkColumn,
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entity->getTablename(), true);
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return this->addForeignKey(indexName, tableName, QStringList(fkColumn),
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entity->getTablename(), QStringList(entity->getPrimaryKey()),
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remove, update);
}

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QString QueryBuilder::createTable(const QString &tableName,
const QHash<QString, QString> &tableDefinition) const {
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return this->createTableQuery(tableName,
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tableDefinition);
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}

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QString QueryBuilder::createFkSuperClass(const Entity *e) const {
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QString r = "";
auto superMetaObject = e->metaObject()->superClass();
if (e->getInheritanceStrategy() == JOINED_TABLE
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&& QString(superMetaObject->className()) !=
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this->entityClassname()) {
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Entity *superClass = EntityInstanceFactory::createInstance(
superMetaObject->className());
if (superClass) {
QString refColumn = superClass->getPrimaryKey();
QString refTable = superClass->getTablename();
r = this->addForeignKey(this->generateIndexName(e->getPrimaryKey(),
e->getTablename(), refColumn, refTable, true), e->getTablename(),
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QStringList(e->getPrimaryKey()), refTable, QStringList(refColumn),
this->getForeignKeyCascade(CASCADE),
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this->getForeignKeyCascade(CASCADE));
delete superClass;
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}
}
return r;
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}

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QString QueryBuilder::createTableQuery(const QString &tableName,
const QHash<QString, QString> &tableDefinition) const {
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bool first = true;
QString s = "CREATE TABLE ";
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s.append(this->schema->quoteTableName(tableName).append(" ("));
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auto i = tableDefinition.constBegin();
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while (i != tableDefinition.constEnd()) {
if (first) {
first = false;
} else {
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s.append(", ");
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}
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s.append(this->schema->quoteColumnName(i.key())).append(" " +
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this->getColumnType(
i.value()));
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++i;
}
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s.append(");");
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return s;
}

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QString QueryBuilder::renameTable(QString tableName, QString newName) const {
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return "RENAME TABLE " + this->schema->quoteTableName(
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tableName) + " TO " +
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this->schema->quoteTableName(
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newName);
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}

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QString QueryBuilder::dropTable(QString tableName) const {
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return "DROP TABLE " + this->schema->quoteTableName(tableName);
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}

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QString QueryBuilder::truncateTable(QString tableName) const {
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return "TRUNCATE TABLE " + this->schema->quoteTableName(tableName);
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}

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QString QueryBuilder::addColumn(QString tableName, QString columnName,
QString columnType) const {
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return "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + " ADD " +
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this->schema->quoteColumnName(
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columnName) + " " + this->getColumnType(columnType);
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}

QString QueryBuilder::dropColumn(QString tableName, QString columName) const {
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return "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + " DROP COLUMN " +
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this->schema->quoteColumnName(columName);
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}

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QString QueryBuilder::renameColumn(QString tableName, QString oldName,
QString newName) const {
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return "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + " RENAME COLUMN " +
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this->schema->quoteColumnName(oldName) + " TO " +
this->schema->quoteColumnName(
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newName);
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}

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QString QueryBuilder::alterColumn(QString tableName, QString columnName,
QString newType) const {
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return "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + " CHANGE " +
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this->schema->quoteColumnName(columnName) + " " +
this->schema->quoteColumnName(columnName) + this->getColumnType(newType);
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}

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QString QueryBuilder::addPrimaryKey(QString name, QString tableName,
QStringList columns) const {
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return "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + " ADD CONSTRAINT " +
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this->schema->quoteColumnName(name) + "PRIMARY KEY (" +
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this->buildColumns(columns) + " )";
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}

QString QueryBuilder::dropPrimaryKey(QString name, QString tableName) const {
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return "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + " DROP CONSTRAINT " +
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this->schema->quoteColumnName(name);
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}

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QString QueryBuilder::addForeignKey(QString name, QString tableName,
QStringList columns,
QString refTableName,
QStringList refColumns, QString deleteConstraint,
QString updateConstraint) const {
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QString r = "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + "ADD CONSTRAINT " +
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this->schema->quoteColumnName(name)
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+ " FOREIGN KEY (" + this->buildColumns(columns) + ")" + " REFERENCES " +
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this->schema->quoteTableName(
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refTableName) +
" (" + this->buildColumns(refColumns) + ")";
if (!deleteConstraint.isEmpty()) {
r.append(" ON DELETE " + deleteConstraint);
}
if (!updateConstraint.isEmpty()) {
r.append(" ON UPDATE " + updateConstraint);
}
return r;
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}

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QString QueryBuilder::generateIndexName(const QString &name,
const QString &table, const QString &refColumn, const QString &refTable,
const bool fk) const {
return QString(fk ? "fk" : "idx").append("_").append(name).append(table).append(
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refColumn).append(refTable);
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}

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QString QueryBuilder::generateColumnNameID(QString name) const {
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return name.append("_id");
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}

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QString QueryBuilder::getForeignKeyCascade(DbForeignKeyCascade cascade) const {
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QString r = "";
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switch (cascade) {
case RESTRICT:
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r = "RESTRICT";
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break;
case CASCADE:
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r = "CASCADE";
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break;
case NO_ACTION:
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r = "NO ACTION";
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break;
case SET_DEFAULT:
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r = "SET DEFAULT";
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break;
case SET_NULL:
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r = "SET NULL";
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break;
}
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return r;
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}

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QString QueryBuilder::dropForeignKey(QString name, QString tableName) const {
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return "ALTER TABLE " + this->schema->quoteTableName(
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tableName) + " DROP CONSTRAINT " +
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this->schema->quoteColumnName(name);
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}

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QString QueryBuilder::createIndex(QString name, QString tableName,
QStringList columns,
bool unique) const {
QString s = (unique ? "CREATE UNIQUE INDEX " : "CREATE INDEX ") +
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this->schema->quoteTableName(
name) + " ON " + this->schema->quoteTableName(tableName) + " (";
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s.append(this->buildColumns(columns));
s.append(");");
return s;
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}

QString QueryBuilder::dropIndex(QString name, QString tableName) const {
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return "DROP INDEX " + this->schema->quoteTableName(name) + " ON " +
this->schema->quoteTableName(
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tableName);
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}

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QSharedPointer<Database> QueryBuilder::getDatabase() const {
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return this->database;
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}
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void QueryBuilder::setDatabase(const QSharedPointer<Database> &value) {
database = value;
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}

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QString QueryBuilder::buildCreateQuery(QHash<QString, QVariant>::const_iterator
i,
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QHash<QString, QVariant>::const_iterator end,
QString &p1, QString &p2) const {
bool first = true;
while (i != end) {
if (!first) {
p1 += ",";
p2 += ",";
} else {
first = false;
}
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p1 += this->schema->quoteColumnName(i.key());
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p2 += ":" + i.key();
++i;
}
p1 += ")";
p2 += ");";
return p1 + p2;
}

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QHash<QString, QString> QueryBuilder::generateTableDefinition(
const QSharedPointer<Entity> &entity)
const {
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auto map = QHash<QString, QString>();
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auto o = entity->metaObject();
auto superMetaObject = entity->metaObject()->superClass();
auto superMetaObjectPropertyMap = entity->getSuperMetaProperties();
QHash<QString, Relation> relations = entity->getRelations();
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for (int var = 0; var < o->propertyCount(); ++var) {
auto m = o->property(var);
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if (!superMetaObjectPropertyMap.contains(QString(m.name()))
&& m.name() != QString("objectName") && m.isReadable()
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&& !entity->getTransientAttributes().contains(m.name())) {
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if (m.isEnumType()) {
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map.insert(m.name(), this->schema->getTypeMap()->value(
this->schema->TYPE_INTEGER));
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} else if (relations.contains(m.name())) {
Relation r = relations.value(m.name());
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if (r.getType() == RelationType::MANY_TO_ONE
|| (r.getType() == RelationType::ONE_TO_ONE
&& r.getMappedBy().isEmpty())) {
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map.insert(this->generateColumnNameID(QString(m.name())),
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this->schema->TYPE_BIGINT);
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}
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} else if (entity->getBLOBColumns().contains(m.name())) {
map.insert(m.name(), this->schema->getTypeMap()->value(
this->schema->TYPE_BINARY));
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} else {
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map.insert(m.name(), this->transformAbstractTypeToRealDbType(
this->transformTypeToAbstractDbType(
m.typeName())));
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}
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}
}
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if (!(QString(superMetaObject->className()) !=
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this->entityClassname()
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&& entity->getInheritanceStrategy() == JOINED_TABLE)) {
map.insert(entity->getPrimaryKey(), this->schema->TYPE_BIGPK);
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}
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return map;
}

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QString QueryBuilder::generateManyToManyTableName(const QSharedPointer<Entity>
&firstEntity,
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const QSharedPointer<Entity> &secondEntity) const {
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QString first = QString(firstEntity->getClassname());
QString second = QString(secondEntity->getClassname());
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if (QString::compare(first, second, Qt::CaseSensitive) <= 0) {
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return firstEntity->getTablename() + "_" +
secondEntity->getTablename();
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} else {
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return secondEntity->getTablename() + "_" +
firstEntity->getTablename();
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}
}

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QHash<QString, QHash<QString, QString>> QueryBuilder::generateRelationTables(
const QSharedPointer<Entity> &entity)
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const {
auto relations = QHash<QString, QHash<QString, QString>>();
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QHash<QString, Relation> m = entity->getRelations();
auto props = entity->getMetaProperties();
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for (auto i = m.begin(); i != m.end(); ++i) {
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Relation r = i.value();
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if (r.getType() == MANY_TO_MANY && r.getMappedBy().isEmpty()) {
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QHash<QString, QString> h = QHash<QString, QString>();
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h.insert(entity->getPrimaryKey(), this->schema->TYPE_BIGPK);
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h.insert(this->generateManyToManyColumnName(entity),
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this->schema->TYPE_BIGINT);
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auto meta = props.value(r.getPropertyName());
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QSharedPointer<Entity> ptr = QSharedPointer<Entity>
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(EntityInstanceFactory::createInstance(EntityInstanceFactory::extractEntityType(
QMetaType::typeName(meta.userType()))));
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h.insert(this->generateManyToManyColumnName(ptr),
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this->schema->TYPE_BIGINT);
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relations.insert(this->generateManyToManyTableName(entity, ptr), h);
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}
}
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return relations;
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}


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QString QueryBuilder::transformTypeToAbstractDbType(QString typeName) const {
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QHash<QString, QString> *m = this->schema->getAbstractTypeMap().data();
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if (m->contains(typeName)) {
return m->value(typeName);
}
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for (auto i = m->begin(); i != m->end(); ++i) {
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if (i.key().contains(typeName)) {
return i.value();
}
}
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return this->schema->TYPE_TEXT;
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}

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QString QueryBuilder::transformAbstractTypeToRealDbType(
QString typeName) const {
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return this->schema->getTypeMap()->value(typeName);
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}

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QString QueryBuilder::getColumnType(const QString &type) const {
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/**
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* @WARNING
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*/
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QHash<QString, QString> *tMap = this->schema->getTypeMap().data();
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if (tMap->contains(type)) {
return this->transformAbstractTypeToRealDbType(type);
}
//cant believe that this could work in Qt
//https://github.com/yiisoft/yii2/blob/master/framework/db/QueryBuilder.php
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QRegularExpression reg = QRegularExpression(
QRegularExpression::escape("/^(\\w+)\((.+?)\\)(.*)$/"));
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reg.optimize();
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QRegularExpressionMatchIterator i = reg.globalMatch(type, 0,
QRegularExpression::PartialPreferFirstMatch);
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short s = 0;
bool ok = false;
QString before = "";
while (i.hasNext() && s < 2) {
before = i.next().captured();
if (tMap->contains(before)) {
ok = true;
}
if (ok) {
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return before.replace(QRegularExpression::escape("/\\(.+\\)/"),
"(" + i.next().captured() + ")");
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}
s++;
}
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reg = QRegularExpression(QRegularExpression::escape("/^(\\w+)\\s+/"));
i = reg.globalMatch(type, 0, QRegularExpression::PartialPreferFirstMatch);
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if (i.hasNext()) {
return before.replace(QRegularExpression::escape("/^w+/"), i.next().captured());
}
return type;
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}

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/**
* @brief QueryBuilder::find
* @param id
* @param tableName
* @return
*/
QSqlQuery QueryBuilder::find(const qint64 &id, const QString &tableName) const {
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QSqlQuery q = this->database->getQuery(this->selectBase(QStringList(
tableName)) + " WHERE id= :id LIMIT 1;");
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q.bindValue(":id", id);
return q;
}

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QString QueryBuilder::selectBase(const QStringList &tables,
const QStringList &columns) const {
QString r = "SELECT ";
if (columns.isEmpty()) {
r.append("*");
} else {
for (int var = 0; var < columns.size(); ++var) {
if (var != 0) {
r.append(" ");
}
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r.append(this->schema->quoteColumnName(columns.at(var)));
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}
}
r.append(" FROM");
for (int var = 0; var < tables.size(); ++var) {
r.append(" ");
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r.append(this->schema->quoteTableName(tables.at(var)));
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}
return r;
}

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QSqlQuery QueryBuilder::find(const qint64 &id,
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const QSharedPointer<Entity> &entity, qint64 offset, QString pk) const {
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QSqlQuery q = this->database->getQuery(this->selectBase(QStringList(
entity->getTablename())) + this->joinSuperClasses(
entity) + " WHERE " + this->schema->quoteColumnName(
pk) + "= :id" + this->limit(1, offset));
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q.bindValue(":id", id);
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return q;
}

QSqlQuery QueryBuilder::findAll(const QSharedPointer<Entity> &entity,
const qint64 limit, qint64 offset) {
return this->database->getQuery(this->selectBase(QStringList(
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entity->getTablename())) + " " + this->joinSuperClasses(
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entity) + this->limit(limit, offset) + ";");
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}

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/**
* @brief QueryBuilder::findByAttributes
* @param m
* @param tableName
* @param ignoreID
* @return
*/
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QSqlQuery QueryBuilder::findByAttributes(const QHash<QString, QVariant> &m,
const QString &tableName,
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const bool &ignoreID, const qint64 limit, const qint64 offset) const {
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QSqlQuery q = this->database->getQuery(this->selectBase(QStringList(
tableName)) + this->where(m, "AND", ignoreID) + this->limit(limit, offset));
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this->bindValues(m, q, ignoreID);
return q;
}

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QSqlQuery QueryBuilder::findByAttributes(const QSharedPointer<Entity> &e,
bool ignoreID,
const qint64 limit,
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const qint64 offset) {
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QHash<QString, QVariant> values = this->getEntityAttributes(
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e->getMetaProperties(), e);
return this->findByAttributes(values, e->getTablename(), ignoreID, limit,
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offset);
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}

QSqlQuery QueryBuilder::findAll(const QString &tableName) const {
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return this->database->getQuery(this->selectBase(QStringList(tableName)) + ";");
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}

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QList<QSqlQuery> QueryBuilder::remove(const QSharedPointer<Entity> &entity)
const {
QList<QSqlQuery> queries = QList<QSqlQuery>();
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queries.append(this->remove(entity->getTablename(),
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entity->getProperty(entity->getPrimaryKey()).toLongLong()));
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if (entity->getInheritanceStrategy() != PER_CLASS_TABLE
&& entity->isInheritanceCascaded()) {
auto classes = entity->superClasses(true);
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for (int var = 0; var < classes.size(); ++var) {
auto item = classes.at(var);
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auto instance = EntityInstanceFactory::createInstance(item->className());
if (instance) {
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queries.append(this->remove(instance->getTablename(),
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entity->getProperty(entity->getPrimaryKey()).toLongLong()));
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delete instance;
instance = 0;
}
}
}
return queries;
}


QSqlQuery QueryBuilder::remove(const QString &tableName,
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const qint64 &id, const QString &primaryKey) const {
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QSqlQuery q = this->database->getQuery("DELETE FROM " +
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this->schema->quoteTableName(
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tableName) + " WHERE " +
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this->schema->quoteColumnName(primaryKey) + "=:id;");
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q.bindValue(":id", id);
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return q;
}

QSqlQuery QueryBuilder::findId(const QSharedPointer<Entity> &entity) const {
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QHash<QString, QVariant> values = this->getEntityAttributes(
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entity->getMetaProperties(),
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entity);
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QSqlQuery q = this->database->getQuery(this->selectBase(QStringList(
entity->getTablename()),
QStringList(entity->getPrimaryKey())) + this->where(values,
"AND", true) + " LIMIT 1");
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this->bindValues(values, q);
return q;
}

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QSqlQuery QueryBuilder::count(const QSharedPointer<Entity> &entity,
bool ignoreID) const {
QHash<QString, QVariant> values = this->getEntityAttributes(
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entity->getMetaProperties(),
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entity);
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QSqlQuery q = this->database->getQuery(this->selectBase(QStringList(
entity->getTablename()),
QStringList(this->countFunction())) + this->where(
values, "AND", ignoreID));
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this->bindValues(values, q, ignoreID);
return q;
}

QSqlQuery QueryBuilder::count(const QString &tableName) const {
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QSqlQuery q = this->database->getQuery(this->selectBase(QStringList(
tableName), QStringList(this->countFunction())) + ";");
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return q;
}

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QList<QSqlQuery> QueryBuilder::merge(const QSharedPointer<Entity> &entity)
const {
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return this->createOrMerge(entity, false);
}


QList<QSqlQuery> QueryBuilder::createOrMerge(const QSharedPointer<Entity>
&entity, bool insert) const {
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const QList<ClassAttributes> attrs = this->inheritedAttributes(entity);
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auto queries = QList<QSqlQuery>();
for (int var = 0; var < attrs.size(); ++var) {
auto attr = attrs.at(var);
auto attrHash = attr.getAttributes();
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queries.append(insert ? this->insert(attr.getName(), attrHash,
attr.getPk()) : this->update(attr.getName(), attrHash, attr.getPk()));
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}
return queries;
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}

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QList<QSqlQuery> QueryBuilder::create(const QSharedPointer<Entity> &entity)
const {
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return this->createOrMerge(entity, true);
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}

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QSqlQuery QueryBuilder::removeAll(const QString &tableName) const {
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return this->database->getQuery(this->truncateTable(tableName));
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}

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QSqlQuery QueryBuilder::insert(const QString &tableName,
QHash<QString, QVariant> &attributes, const QString &primaryKey) const {
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//if(attributes.size() == 1) {
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// attributes.insert(primaryKey,QVariant("null"));
// } else {
attributes.remove(primaryKey);
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// }
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QSqlQuery q = this->database->getQuery();
QString p1 = "INSERT INTO " + this->schema->quoteTableName(
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tableName) + "(";
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QString p2 = "VALUES(";
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if (!attributes.isEmpty()) {
q.prepare(this->buildCreateQuery(attributes.constBegin(), attributes.constEnd(),
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p1, p2));
}
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this->bindValues(attributes, q);
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return q;
}

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QSqlQuery QueryBuilder::update(const QString &tableName,
QHash<QString, QVariant> &attributes, const QString &primaryKey) const {
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QSqlQuery q = this->database->getQuery("UPDATE " +
this->schema->quoteTableName(tableName) + " SET " + this->attributes(
attributes) + " WHERE " + this->schema->quoteColumnName(
primaryKey) + "=:id;");
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this->bindValues(attributes, q);
return q;
}

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QSqlQuery QueryBuilder::oneToMany(const QString &tableName,
const QString &attribute,
const qint64 &id,
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const qint64 &limit) {
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QHash<QString, QVariant> values = QHash<QString, QVariant>();
values.insert(attribute, id);
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return this->findByAttributes(values, tableName, false, limit);
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}

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QSqlQuery QueryBuilder::manyToMany(const QString &tableName,
const QString &attribute,
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const qint64 &id) {
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QSqlQuery q = this->database->getQuery();
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QString sql = this->selectBase(QStringList(tableName), QStringList("*"));
sql += " WHERE ";
sql += this->schema->quoteColumnName(
attribute);
sql += " = :id;";
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q.prepare(sql);
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q.bindValue(":id", id);
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return q;
}

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QSqlQuery QueryBuilder::manyToManyDelete(const QString &tableName,
const QString &attribute, const qint64 &id) {
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QSqlQuery q = this->database->getQuery();
QString sql = "DELETE FROM " + this->schema->quoteTableName(
tableName) + " WHERE " + this->schema->quoteColumnName(
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attribute) + "=:id";
q.prepare(sql);
q.bindValue(":id", id);
return q;
}

QSqlQuery QueryBuilder::manyToManyInsert(const QString &tableName,
const QString &col1, const QString &col2) const {
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QSqlQuery q = this->database->getQuery();
QString sql = "INSERT INTO " + this->schema->quoteTableName(
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tableName) + "(" + col1 + "," + col2 + ")"
+ "VALUES(?, ?);";
q.prepare(sql);
return q;
}
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QString QueryBuilder::superClassColumnName(const QMetaObject *&superMeta)
const {
return QString(superMeta->className()).toLower();
}

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QString QueryBuilder::joinSuperClasses(const QSharedPointer<Entity> &entity)
const {
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auto classes = entity->superClasses(true);
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QString joined = "";
Entity *e = 0;
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for (int var = 0; var < classes.size(); ++var) {
auto metaObject = classes.at(var);
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e = EntityInstanceFactory::createInstance(metaObject->className());
if (e) {
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joined.append(" ");
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joined.append(this->leftJoin(e->getTablename(), entity->getTablename(),
e->getPrimaryKey(), entity->getPrimaryKey()));
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}
delete e;
e = 0;
}
return joined;
}

QString QueryBuilder::countFunction(const QString &distinctColumn) const {
return QString("COUNT(" + distinctColumn.isEmpty() ? "*" : (this->distinct() +
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this->schema->quoteColumnName(distinctColumn)) + ")");
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}

QString QueryBuilder::distinct() const {
return "DISTINCT";
}

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QString QueryBuilder::entityClassname() const {
return QString("CuteEntityManager::Entity");
}

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QString QueryBuilder::limit(const qint64 &limit, const qint64 &offset) const {
QString s = "";
if (limit > 0) {
s.append(" LIMIT ").append(QString::number(limit));
}
if (offset > 0) {
s.append(" OFFSET ").append(QString::number(offset));
}
return s;
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}

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QString QueryBuilder::generateManyToManyColumnName(const QSharedPointer<Entity>
&entity) const {
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if (entity) {
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return this->generateColumnNameID(entity->getTablename());
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}
qDebug() << "Entity is empty!";
return "";
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}

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QSqlQuery QueryBuilder::getQuery() const {
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return this->database->getQuery();
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}

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QHash<QString, QVariant> QueryBuilder::saveAttributes(const
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QSharedPointer<Entity> &entity, QHash<QString, QMetaProperty> props,
QHash<QString, Relation> relations) const {
if (props.isEmpty()) {
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props = entity->getMetaProperties();
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}
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auto values = this->getEntityAttributes(props, entity);
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auto relValues = this->getManyToOneAttributes(props, entity, relations);
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auto iterator = relValues.constBegin();
while (iterator != relValues.constEnd()) {
values.insert(iterator.key(), iterator.value());
++iterator;
}
return values;
}

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QHash<QString, QMetaProperty> QueryBuilder::processProperties(
const QSharedPointer<Entity> &e,
QHash<QString, QMetaProperty> &usedProperties) const {
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auto properties = e->getMetaProperties();
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QMutableHashIterator<QString, QMetaProperty> i(properties);
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while (i.hasNext()) {
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i.next();
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if (usedProperties.contains(i.key()) && i.key() != e->getPrimaryKey()) {
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properties.remove(i.key());
} else {
usedProperties.insert(i.key(), i.value());
}
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}
return properties;
}

QHash<QString, Relation> QueryBuilder::processRelations(
const QSharedPointer<Entity> &e,
QHash<QString, Relation> &usedRelations) const {
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auto relations = e->getRelations();
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auto i = QMutableHashIterator<QString, Relation>(relations);
while (i.hasNext()) {
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i.next();
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if (usedRelations.contains(i.key())) {
relations.remove(i.key());
} else {
usedRelations.insert(i.key(), i.value());
}
}
return relations;
}

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QList<QueryBuilder::ClassAttributes> QueryBuilder::inheritedAttributes(
const QSharedPointer<Entity> &entity) const {
auto list = QList<QueryBuilder::ClassAttributes>();
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if (entity->getInheritanceStrategy() == JOINED_TABLE) {
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auto classes = QList<const QMetaObject *>();
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classes.append(entity->metaObject());
classes.append(entity->superClasses(true));
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auto usedProperties = QHash<QString, QMetaProperty>();
auto usedRelations = QHash<QString, Relation>();
QSharedPointer<Entity> e;
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for (int var = classes.size() - 1; var >= 0; --var) {
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auto metaObj = classes.at(var);
e = QSharedPointer<Entity>(EntityInstanceFactory::createInstance(
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metaObj));
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if (e) {
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list.append(QueryBuilder::ClassAttributes(e->getTablename(),
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this->saveAttributes(entity, this->processProperties(e, usedProperties),
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this->processRelations(e, usedRelations)), e->getPrimaryKey()));
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} else {
033279c9 SebastianDiel
qDebug() << "Instance of " << metaObj->className() << " could not be created";
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break;
}
}
} else {
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list.append(QueryBuilder::ClassAttributes(entity->getTablename(),
this->saveAttributes(entity), entity->getPrimaryKey()));
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}
return list;
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}

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QString QueryBuilder::leftJoin(const QString &foreignTable,
const QString &tableName, const QString &foreignKey,
const QString &primaryKey) const {
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return "LEFT JOIN " + this->schema->quoteTableName(
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foreignTable) + " ON " +
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this->schema->quoteColumnName(foreignTable + "." + primaryKey) + "=" +
this->schema->quoteColumnName(
f5087482 Christian Ehringfeld
tableName + "." + foreignKey);
}

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QHash<QString, QVariant> QueryBuilder::getEntityAttributes(
const QHash<QString, QMetaProperty>
&props,
const QSharedPointer<Entity> &entity) const {
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auto map = QHash<QString, QVariant>();
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auto transientAttrs = entity->getTransientAttributes();
auto relations = entity->getRelations();
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auto i = props.constBegin();
while (i != props.constEnd()) {
if (!transientAttrs.contains(i.key()) && !relations.contains(i.key())) {
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map.insert(i.key(), i.value().read(entity.data()));
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}
++i;
}
return map;
}

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QHash<QString, QVariant> QueryBuilder::getManyToOneAttributes(
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QHash<QString, QMetaProperty>
props,
const QSharedPointer<Entity> &entity,
QHash<QString, Relation> relations) const {
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auto map = QHash<QString, QVariant>();
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if (relations.isEmpty()) {
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relations = entity->getRelations();
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}
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auto i = relations.constBegin();
while (i != relations.constEnd()) {
Relation r = i.value();
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if ((r.getType() == MANY_TO_ONE && props.contains(i.key()))
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|| (r.getType() == ONE_TO_ONE && r.getMappedBy().isEmpty())) {
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auto v = props.value(i.key()).read(entity.data());
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QSharedPointer<Entity> e = EntityInstanceFactory::castQVariant(v);
if (e) {
this->insertRelationId(e.data(), map, i.key());
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}
}
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++i;
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}
return map;
}

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void QueryBuilder::insertRelationId(const Entity *e,
QHash<QString, QVariant> &map,
QString relName) const {
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if (e && e->getProperty(e->getPrimaryKey()).toLongLong() > -1) {
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map.insert(this->generateColumnNameID(relName),
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e->getProperty(e->getPrimaryKey()));
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}
}

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QString QueryBuilder::buildColumns(const QStringList &columns) const {
QString r = "";
bool first = true;
for (int var = 0; var < columns.size(); ++var) {
if (!first) {
r.append(",");
} else {
first = false;
}
r.append(columns.at(var));
}
return r;
}

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void QueryBuilder::bindValues(const QHash<QString, QVariant> &h, QSqlQuery &q,
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bool ignoreID, const QString &primaryKey) const {
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QHash<QString, QVariant>::const_iterator i = h.constBegin();
while (i != h.constEnd()) {
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if (!ignoreID || (ignoreID && !(i.key() == primaryKey))) {
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q.bindValue(":" + i.key(), i.value());
}
++i;
}
}

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QString QueryBuilder::where(const QSharedPointer<Entity> &entity,
QString conjunction,
bool ignoreID) const {
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return this->where(this->getEntityAttributes(entity->getMetaProperties(),
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entity),
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conjunction, ignoreID, entity->getPrimaryKey());
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}

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QString QueryBuilder::where(const QHash<QString, QVariant> &m,
const QString &conjunction,
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bool ignoreID, const QString &primaryKey) const {
if (m.size() == 0 || (ignoreID && m.contains(primaryKey) && m.size() == 1)) {
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return "";
}
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return " WHERE " + this->attributes(m, conjunction, ignoreID, primaryKey);
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}

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QString QueryBuilder::attributes(const QHash<QString, QVariant> &m,
const QString &conjunction,
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bool ignoreID, const QString &primaryKey) const {
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QString rc = "";
if (!m.isEmpty()) {
QHash<QString, QVariant>::const_iterator i = m.constBegin();
while (i != m.constEnd()) {
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if (!ignoreID || (ignoreID && !(i.key() == primaryKey))) {
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if (!(rc == "")) {
rc += " " + conjunction + " ";
}
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rc += this->schema->quoteColumnName(i.key()) + "=:" + i.key();
dc6b13b4 Christian Ehringfeld
}
++i;
}
}
return rc;
}
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QSharedPointer<Schema> QueryBuilder::getSchema() const {
return schema;
}
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void QueryBuilder::setSchema(const QSharedPointer<Schema> &value) {
schema = value;
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}
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QueryBuilder::ClassAttributes::ClassAttributes(const QString name,
const QHash<QString, QVariant> attributes, QString pk) {
this->name = name;
this->attributes = attributes;
this->pk = pk;
}

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QString QueryBuilder::ClassAttributes::getName() const {
return name;
}

void QueryBuilder::ClassAttributes::setName(const QString &value) {
name = value;
}

QHash<QString, QVariant> QueryBuilder::ClassAttributes::getAttributes() const {
return attributes;
}

void QueryBuilder::ClassAttributes::setAttributes(const QHash<QString, QVariant>
&value) {
attributes = value;
}
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QString QueryBuilder::ClassAttributes::getPk() const {
return pk;
}

void QueryBuilder::ClassAttributes::setPk(const QString &value) {
pk = value;
}