| # Gaudi Framework, version v21r11 |

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

Definition at line 389 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.

## 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.

    00407       {
    00408         SmartDataPtr<TYPE> obj ( service , location ) ;
    00409         if ( !obj )
    00410         {
    00411           TYPE2* o = new TYPE2() ;
    00412           common.put ( service , o , location2 ) ;
    00413           if ( common.msgLevel ( MSG::DEBUG ) )
    00414           { common.debug() << "The object of type '"
    00415                            << System::typeinfoName(typeid(*o))
    00416                            << "' has been created from TS at address '"
    00417                            << location2 << "'" << endmsg ; }
    00418           return_type _o = o ;
    00419           return _o ;
    00420         }
    00421         return_type ret = obj ;
    00423         common.Assert ( !(!ret) , "get():: No valid data at '" + location + "'"  ) ;
    00424         if ( common.msgLevel ( MSG::DEBUG ) )
    00425         { common.debug() << "The object of type '"
    00426                          << System::typeinfoName(typeid(*ret))
    00427                          << "' has been retrieved from TS at address '"
    00428                          << location << "'" << endmsg ; }
    00429         // return *VALID* data
    00430         return ret ;
    00431         // ====================================================================
    00432       }

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

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r11/GaudiAlg/GaudiAlg/GetData.h