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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/>.
*/
#ifndef RELATION_H
#define RELATION_H
#include <QString>
#include <QHash>
namespace CuteEntityManager {
enum class RelationType {
ONE_TO_ONE = 0, //e.g. specialization, heritage
ONE_TO_MANY = 1, //@OneToMany(cascade=ALL, mappedBy="customer") e.g. QList<QSharedPointer<Person>>
MANY_TO_ONE = 2, //e.g. QSharedPointer<Person>
//1-n Entity foreign key in same table
MANY_TO_MANY = 3 //e.g. QList<QSharedPointer<Person>> - realized with seperated database table
};

enum class InheritanceStrategy {
PER_CLASS_TABLE,
JOINED_TABLE
};

enum class CascadeType {
ALL,
MERGE,
PERSIST,
REFRESH,
REMOVE
};

class Relation {
public:
explicit Relation();
explicit Relation(QString propertyName, bool optional, RelationType type);
/**
* @brief Relation
* @param propertyName
* @param type
* @param mappedBy Q_PROPERTY in foreign Entity
*/
explicit Relation(QString propertyName, RelationType type,
QString mappedBy = QString(),
QList<CascadeType> cascadeType = QList<CascadeType> {CascadeType::MERGE, CascadeType::PERSIST, CascadeType::REFRESH});
~Relation();
RelationType getType() const;
QString getTypeAsString() const;
void setType(const RelationType &value);

QString getPropertyName() const;
void setPropertyName(const QString &value);

bool getOptional() const;
void setOptional(bool value);

QString getMappedBy() const;
void setMappedBy(const QString &value);

QList<CascadeType> getCascadeType() const;
void setCascadeType(const QList<CascadeType> &value);

protected:
QString propertyName;
QString mappedBy;
RelationType type;
QList<CascadeType> cascadeType;
bool optional;

};

inline bool operator==(const Relation &e1, const Relation &e2) {
return e1.getPropertyName() == e2.getPropertyName();
}

inline uint qHash(const Relation &key, uint seed) {
return qHash(key.getPropertyName(), seed);
}

}

#endif // RELATION_H
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