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root/src/entityhelper.cpp @ c6e41b5c

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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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#include "entityhelper.h"
#include "entity.h"
#include "relation.h"
#include "cache.h"

using namespace CuteEntityManager;
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EntityHelper::EntityHelper() {
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}

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const QHash<QString, Relation> EntityHelper::getNonInheritedRelations(
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const Entity *entity) {
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auto relations = entity->getRelations();
auto superObject = EntityInstanceFactory::newSuperClassInstance(entity);
if (superObject) {
auto superRelations = superObject->getRelations();
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for (auto i = superRelations.constBegin(); i != superRelations.constEnd(); ++i) {
if (relations.contains(i.key())) {
relations.remove(i.key());
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}
}
delete superObject;
superObject = nullptr;
}
return relations;
}

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const QList<const QMetaObject *> EntityHelper::superClasses(
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const Entity *entity, bool
stopAtSingleTableInheritance) {
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QList<const QMetaObject *> classes = QList<const QMetaObject *>();
auto superMetaObject = entity->metaObject()->superClass();
if (entity->getInheritanceStrategy() == InheritanceStrategy::JOINED_TABLE) {
Entity *e = nullptr;
while (superMetaObject && QString(superMetaObject->className()) !=
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QString("CuteEntityManager::Entity")) {
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e = EntityInstanceFactory::createInstance(superMetaObject->className());
if (e) {
classes.append(superMetaObject);
superMetaObject = superMetaObject->superClass();
InheritanceStrategy s = e->getInheritanceStrategy();
delete e;
e = nullptr;
if (stopAtSingleTableInheritance && s == InheritanceStrategy::PER_CLASS_TABLE) {
break;
}
} else {
break;
}
}
}
return classes;
}

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const QHash<QString, QMetaProperty> EntityHelper::getMetaProperties(
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const Entity *entity) {
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return EntityHelper::getMetaProperties(entity->metaObject());
}

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const QHash<QString, QMetaProperty> EntityHelper::getSuperMetaProperties(
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const Entity *entity) {
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auto superMetaObjectPropertyMap = QHash<QString, QMetaProperty>();
auto superMeta = entity->metaObject()->superClass();
if (QString(superMeta->className()) != QString("CuteEntityManager::Entity")
&& entity->getInheritanceStrategy() == InheritanceStrategy::JOINED_TABLE) {
for (int var = 0; var < superMeta->propertyCount(); ++var) {
QMetaProperty prop = superMeta->property(var);
if (prop.isReadable() && prop.isWritable()) {
superMetaObjectPropertyMap.insert(QString(prop.name()), prop);
}
}
}
return superMetaObjectPropertyMap;
}

const QHash<QString, QMetaProperty> EntityHelper::getMetaProperties(
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const QMetaObject *object) {
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auto h = QHash<QString, QMetaProperty>();
for (int var = 0; var < object->propertyCount(); ++var) {
QMetaProperty m = object->property(var);
if (m.isValid() && m.name() != QString("objectName")) {
h.insert(m.name(), m);
}
}
return h;
}

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const QHash<QString, QMetaProperty> EntityHelper::getNonInheritedMetaProperties(
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const Entity *entity) {
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auto props = EntityHelper::getMetaProperties(entity);
auto superObject = EntityInstanceFactory::newSuperClassInstance(entity);
if (superObject) {
auto superProps = EntityHelper::getMetaProperties(superObject);
for (auto iterator = superProps.constBegin(); iterator != superProps.constEnd();
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++iterator) {
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if (props.contains(iterator.key())) {
props.remove(iterator.key());
}
}
delete superObject;
superObject = nullptr;
}
return props;
}

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const QHash<QString, QMetaProperty> EntityHelper::getInheritedMetaProperties(
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const Entity *entity) {
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auto props = EntityHelper::getMetaProperties(entity);
auto superObject = EntityInstanceFactory::newSuperClassInstance(entity);
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auto wholeProperties = QHash<QString, QMetaProperty>();
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if (superObject) {
auto superProps = EntityHelper::getMetaProperties(superObject);
auto iterator = superProps.constBegin();
for (auto i = props.constBegin(); i != props.constEnd(); ++i) {
if (!superProps.contains(iterator.key())) {
wholeProperties.insert(iterator.key(), iterator.value());
}
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}
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delete superObject;
superObject = nullptr;
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}
return wholeProperties;
}

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const QHash<Relation, QMetaProperty> EntityHelper::getRelationProperties(
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const Entity *entity) {
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auto h = QHash<Relation, QMetaProperty>();
auto relations = entity->getRelations();
for (int var = 0; var < entity->metaObject()->propertyCount(); ++var) {
QMetaProperty m = entity->metaObject()->property(var);
if (m.isValid() && relations.contains(QString(m.name()))) {
h.insert(relations.value(m.name()), m);
}
}
return h;
}

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Entity* EntityHelper::copyObject(const Entity *entity) {
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auto metaObject = entity->metaObject();
auto newInstance = EntityInstanceFactory::createInstance(metaObject);
if(newInstance) {
for (int i = 0; i < metaObject->propertyCount(); ++i) {
auto property = metaObject->property(i);
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if(property.isValid() && property.name() != entity->getPrimaryKey()) {
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property.write(newInstance, property.read(entity));
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}
}
}
return newInstance;
}

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Entity *EntityHelper::getBaseClassObject(const QSharedPointer<Entity> &entity,
QString attributeName) {
auto superObject = EntityInstanceFactory::createInstance(entity->metaObject());
auto objectBefore = superObject;
bool first = true;
while(superObject) {
auto props = EntityHelper::getMetaProperties(superObject);
if(!props.contains(attributeName) ||
superObject->getInheritanceStrategy() == InheritanceStrategy::PER_CLASS_TABLE) {
break;
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} else if(!first) {
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delete objectBefore;
objectBefore = nullptr;
} else {
first = false;
}
objectBefore = superObject;
superObject = EntityInstanceFactory::newSuperClassInstance(superObject);
}
return objectBefore;
}

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const char *EntityHelper::getClassname(const Entity *entity) {
return entity->metaObject()->className();
}

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const QString EntityHelper::getClassName(const Entity *entity) {
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return QString(entity->metaObject()->className());
}

void EntityHelper::setListProperty(const QSharedPointer<Entity> &entity,
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QList<QSharedPointer<Entity>> &list,
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const QMetaProperty &property) {
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QVariant var;
var.setValue<QList<QSharedPointer<Entity>>>(list);
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property.write(entity.data(), var);
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}

void EntityHelper::addEntityToListProperty(const QSharedPointer<Entity>
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&entity, QSharedPointer<Entity> add, const QMetaProperty &property) {
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QVariant var = property.read(entity.data());
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QList<QSharedPointer<Entity>> list = (!var.isNull() && var.data() &&
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var.canConvert<QList<QVariant>>() ? EntityInstanceFactory::castQVariantList(
var) : QList<QSharedPointer<Entity>>());
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if (!list.contains(add)) {
list.append(add);
EntityHelper::setListProperty(entity, list, property);
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}
}

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void EntityHelper::removeEntityFromListProperty(const QSharedPointer<Entity>
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&entity, QSharedPointer<Entity> remove, const QMetaProperty &property) {
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QVariant var = property.read(entity.data());
if (!var.isNull() && var.canConvert<QList<QVariant>>()) {
auto list = EntityInstanceFactory::castQVariantList(var);
for (int i = 0; i < list.size(); ++i) {
auto e = list.at(i);
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if (e->getId() == remove->getId()) {
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list.removeAt(i);
break;
}
}
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EntityHelper::setListProperty(entity, list, property);
}
}

void EntityHelper::clearEntityListProperty(const QSharedPointer<Entity> &entity,
const QMetaProperty &property) {
QVariant var = property.read(entity.data());
if (var.canConvert<QList<QVariant>>()) {
auto list = EntityInstanceFactory::castQVariantList(var);
list.clear();
EntityHelper::setListProperty(entity, list, property);
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}
}

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void EntityHelper::setProperty(const QSharedPointer<Entity> &entity,
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QSharedPointer<Entity> value,
const QMetaProperty &property) {
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if (value && value->getProperty(value->getPrimaryKey()).toLongLong()
> -1) {
QVariant var;
var.setValue<QSharedPointer<Entity>>(value);
property.write(entity.data(), var);
}
}

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void EntityHelper::setProperty(const QSharedPointer<Entity> &entity,
QSharedPointer<Entity> value, const QString property) {
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auto props = EntityHelper::getMetaProperties(entity.data());
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if (props.contains(property)) {
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QVariant var;
var.setValue<QSharedPointer<Entity>>(value);
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entity->setProperty(property, var);
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}
}

QMetaProperty EntityHelper::mappedProperty(const Relation &r,
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const QSharedPointer<Entity> &foreignEntity) {
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QMetaProperty prop;
auto props = EntityHelper::getMetaProperties(foreignEntity.data());
if (!r.getMappedBy().isEmpty() && props.contains(r.getMappedBy())) {
prop = props.value(r.getMappedBy());
} else {
auto relations = foreignEntity->getRelations();
for (auto iterator = relations.constBegin(); iterator != relations.constEnd();
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++iterator) {
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auto rel = iterator.value();
if (rel.getMappedBy() == r.getPropertyName()) {
prop = props.value(rel.getPropertyName());
break;
}
}
}
return prop;
}
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QHash<QString, QVariant> EntityHelper::getEntityAttributes(
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const QHash<QString, QMetaProperty>
&props,
const QSharedPointer<Entity> &entity) {
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auto map = QHash<QString, QVariant>();
auto transientAttrs = entity->getTransientAttributes();
auto relations = entity->getRelations();
auto i = props.constBegin();
while (i != props.constEnd()) {
if (!transientAttrs.contains(i.key()) && !relations.contains(i.key())) {
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if(i.value().isEnumType()) {
map.insert(i.key(), i.value().read(entity.data()).toInt());
} else {
map.insert(i.key(), i.value().read(entity.data()));
}
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}
++i;
}
return map;
}