| # Gaudi Framework, version v22r4 |

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# Gaudi::Utils::GetOrCreateData< TYPE, TYPE2 > Struct Template Reference

Helper structure for implementation of "getOrCreate"-functions for GaudiCommon<BASE> More...

`#include <GetData.h>`

Inheritance diagram for Gaudi::Utils::GetOrCreateData< TYPE, TYPE2 >:
[legend]

List of all members.

## Public Types
typedef Getter::Type | Type
typedef Getter::return_type | return_type
| the actual return type
## Public Member Functions
template<class COMMON >
return_type | operator() (const COMMON &common, IDataProviderSvc *service, const std::string &location, const std::string &location2) const
| the only one essential method
## Private Types
typedef GetData< TYPE > | Getter
| the actual data getter

## Detailed Description

### template<class TYPE, class TYPE2>
struct Gaudi::Utils::GetOrCreateData< TYPE, TYPE2 >

Helper structure for implementation of "getOrCreate"-functions for GaudiCommon<BASE>

Author:
  Vanya BELYAEV Ivan.Belyaev@nikhef.nl

Date:
  2008-07-22

Definition at line 380 of file GetData.h.

## Member Typedef Documentation

template<class TYPE, class TYPE2>

typedef GetData<TYPE> Gaudi::Utils::GetOrCreateData< TYPE, TYPE2 >::Getter`[private]`

the actual data getter

Definition at line 385 of file GetData.h.

template<class TYPE, class TYPE2>

typedef Getter::return_type Gaudi::Utils::GetOrCreateData< TYPE, TYPE2 >::return_type

the actual return type

Definition at line 391 of file GetData.h.

template<class TYPE, class TYPE2>

typedef Getter::Type Gaudi::Utils::GetOrCreateData< TYPE, TYPE2 >::Type

Definition at line 389 of file GetData.h.

## Member Function Documentation

template<class TYPE, class TYPE2>
template<class COMMON >

return_type Gaudi::Utils::GetOrCreateData< TYPE, TYPE2 >::operator() | ( | const COMMON & | common,
|  | IDataProviderSvc * | service,
|  | const std::string & | location,
|  | const std::string & | location2
| ) |  | const`[inline]`

the only one essential method

Parameters:

  common | the actual "worker"
  service | pointer to Data Provider Service
  location | location of objects in TES

Returns:
  the data

check the data

Definition at line 403 of file GetData.h.

          {
            SmartDataPtr<TYPE> obj ( service , location ) ;
            if ( !obj )
            {
              TYPE2* o = new TYPE2() ;
              common.put ( service , o , location2 ) ;
              if ( common.msgLevel ( MSG::DEBUG ) )
              { common.debug() << "The object of type '"
                               << System::typeinfoName(typeid(*o))
                               << "' has been created from TS at address '"
                               << location2 << "'" << endmsg ; }
              return_type _o = o ;
              return _o ;
            }
            return_type ret = obj ;
            common.Assert ( !(!ret) , "get():: No valid data at '" + location + "'"  ) ;
            if ( common.msgLevel ( MSG::DEBUG ) )
            { common.debug() << "The object of type '"
                             << System::typeinfoName(typeid(*ret))
                             << "' has been retrieved from TS at address '"
                             << location << "'" << endmsg ; }
            // return *VALID* data
            return ret ;
            // ====================================================================
          }

The documentation for this struct was generated from the following file:

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r4/GaudiAlg/GaudiAlg/GetData.h

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