CSqlDatabaseObjectCollectionIterator.h

// SPDX-License-Identifier: LGPL-2.1-or-later OR GPL-2.0-or-later OR GPL-3.0-or-later OR LicenseRef-ImtCore-Commercial
#pragma once
 
 
// Qt includes
#include <QtSql/QtSql>
 
// ImtCore includes
#include <imtbase/IObjectCollectionIterator.h>
#include <imtdb/ISqlDatabaseObjectDelegate.h>
 
 
namespace imtdb
{
 
 
class CSqlDatabaseObjectCollectionIterator: virtual public imtbase::IObjectCollectionIterator
{
       typedef imtbase::IObjectCollection::DataPtr DataPtr;
public:
       CSqlDatabaseObjectCollectionIterator(QSqlQuery& sqlQuery, ISqlDatabaseObjectDelegate* databaseDelegate, int elementsCount = -1);
 
       QSqlRecord GetRecord();
       void SetElementsCount(int elementsCount);
 
       // reimplemented (imtbase::IObjectCollectionIterator)
       virtual bool Next() const override;
       virtual bool Previous() const override;
       virtual QByteArray GetObjectId() const override;
       virtual QByteArray GetObjectTypeId() const override;
       virtual bool GetObjectData(imtbase::IObjectCollection::DataPtr& dataPtr) const override;
       virtual idoc::MetaInfoPtr GetDataMetaInfo() const override;
       virtual int GetElementsCount() const override;
       virtual idoc::MetaInfoPtr GetCollectionMetaInfo() const override;
       virtual QVariant GetElementInfo(int infoType) const override;
       virtual QVariant GetElementInfo(QByteArray infoId) const override;
private:
       struct CachedRecordData
       {
              QByteArray objectId;
              QByteArray objectTypeId;
              idoc::MetaInfoPtr objectMetaInfo;
              idoc::MetaInfoPtr collectionMetaInfo;
              bool metaInfoResolved = false;
       };
 
       void ResolveCurrentCache() const;
       void ResolveMetaInfoCache() const;
 
       QVector<QSqlRecord> m_records;
       ISqlDatabaseObjectDelegate* m_databaseDelegate;
 
       int m_elementsCount;
       mutable int m_currentIndex;
       mutable CachedRecordData m_cache;
};
 
 
} // namespace imtdb