#ifndef INSTMGRHELPER_H

#define INSTMGRHELPER_H

#include <sc_export.h>

#include <mgrnode.h>

#include <lazyInstMgr.h>

#include <instmgr.h>

/**

* \file instMgrHelper.h helper classes for the lazyInstMgr. Allows use of SDAI_Application_instance class

* without modification.

*/

/**

* This class is used when creating SDAI_Application_instance's and using a lazyInstMgr. It is returned

* by instMgrAdapter. SDAI_Application_instance only uses the GetSTEPentity function.

*/

class SC_LAZYFILE_EXPORT mgrNodeHelper: public MgrNodeBase {

protected:

lazyInstMgr * _lim;

instanceID _id;

public:

mgrNodeHelper( lazyInstMgr * lim ) {

_lim = lim;

_id = 0;

prev = next = 0;

}

inline void setInstance( instanceID id ) {

_id = id;

}

inline SDAI_Application_instance * GetSTEPentity() {

return _lim->loadInstance( _id, true );

}

};

/**

* This class is used when creating SDAI_Application_instance's and using a lazyInstMgr.

*

* Instances need an InstMgr to look up the instances they refer to. This class pretends to be a normal InstMgr;

* when an instance is looked up, this uses lazyInstMgr to load it, and then returns a pointer to it.

*/

class SC_LAZYFILE_EXPORT instMgrAdapter: public InstMgrBase {

protected:

mgrNodeHelper _mn;

public:

instMgrAdapter( lazyInstMgr * lim ): InstMgrBase(), _mn( lim ) {}

inline mgrNodeHelper * FindFileId( int fileId ) {

//TODO check if fileId exists. if not, return null

_mn.setInstance( fileId );

return &_mn;

}

};

#endif //INSTMGRHELPER_H