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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 RELATION_H
#define RELATION_H
#include <QString>
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#include <QHash>
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namespace CuteEntityManager {
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enum class RelationType {
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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>
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//1-n Entity foreign key in same table
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MANY_TO_MANY = 3 //e.g. QList<QSharedPointer<Person>> - realized with seperated database table
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};

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enum class InheritanceStrategy {
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PER_CLASS_TABLE,
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JOINED_TABLE
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};

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

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

};
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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);
}

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}

#endif // RELATION_H