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CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES > Class Template Reference

A front-end class for "persistent-to-transient" conversion facility. More...

#include <CdbBdbNTupleP2T.hh>

List of all members.

Static Public Member Functions
template<class T, unsigned int NCOL> CdbStatus	convert (CdbCPtr< CdbNTuple< T, NCOL > > &thePtr, const ooRef(BdbObject)&thePersRef)
	Try to convert (from a persistent reference).
template<class T, unsigned int NCOL> CdbStatus	convert (CdbNTuple< T, NCOL > *&thePtr, const ooRef(BdbObject)&thePersRef)
	Try to convert (from a persistent reference) (regular pointer version).
template<class T, unsigned int NCOL> CdbStatus	convert (CdbCPtr< CdbNTuple< T, NCOL > > &thePtr, const CdbObjectPtr &theObjectPtr)
	Try to convert (from a generic CdbObject).
template<class T, unsigned int NCOL> CdbStatus	convert (CdbNTuple< T, NCOL > *&thePtr, const CdbObjectPtr &theObjectPtr)
	Try to convert (from a generic CdbObject) (regular pointer version).

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Detailed Description

template<class ELEMENT_CONVERSION_RULES = CdbBdbNTupleConversionRules_UseDefault>
class CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >

A front-end class for "persistent-to-transient" conversion facility.

DESCRIPTION:

This class is meant to be used as a primary API for user's code who needs to convert a persistent n-tuple into the corresponding transient form. The convertor's design allows to avoid passing explicit template parameters of (both transient and persistent) n-tuples.

Note that this is a template class having template method(s). The only parameter of the template class is:

ELEMENT_CONVERSION_RULES

which is a policy for user defined element conversion. The policy is meant to help in situations when there is no straight-forward mapping between transient and persistent types of elements, or in cases when a user wishes to pack rather small transient types (bit strings, enums, etc.) into bigger persistent elements.

NOTE: this way of transient-to-persistent and vs. transformation of elements has its own "pros" and "cons".

By default the conversion facility uses default rules for elements conversion. See class's specialization below.

See also:

class CdbNTupleConversionImpl

class CdbBdbNTupleConversionRules_UseDefault

class CdbBdbNTupleConversionRules_Default

Definition at line 45 of file CdbBdbNTupleP2T.hh.

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Member Function Documentation

template<class ELEMENT_CONVERSION_RULES = CdbBdbNTupleConversionRules_UseDefault> template<class T, unsigned int NCOL> CdbStatus CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >::convert (  CdbNTuple< T, NCOL > *&    thePtr, const CdbObjectPtr &    theObjectPtr )  [inline, static]

Try to convert (from a generic CdbObject) (regular pointer version). Definition at line 100 of file CdbBdbNTupleP2T.hh. References CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >::convert(), CdbBdbObjectConvertor::narrow(), and CdbStatus::Success.

template<class ELEMENT_CONVERSION_RULES = CdbBdbNTupleConversionRules_UseDefault> template<class T, unsigned int NCOL> CdbStatus CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >::convert (  CdbCPtr< CdbNTuple< T, NCOL > > &    thePtr, const CdbObjectPtr &    theObjectPtr )  [inline, static]

Try to convert (from a generic CdbObject). Unlike the above defined method this one accepts a smart pointer onto a "generic" metadata object representing a persistent object at the level of the transient CDB API. See also: CdbBdbNTupleConversionImpl::to_transient() class CdbBdbObjectConvertor Definition at line 84 of file CdbBdbNTupleP2T.hh. References CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >::convert(), CdbBdbObjectConvertor::narrow(), and CdbStatus::Success.

template<class ELEMENT_CONVERSION_RULES = CdbBdbNTupleConversionRules_UseDefault> template<class T, unsigned int NCOL> CdbStatus CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >::convert (  CdbNTuple< T, NCOL > *&    thePtr, const ooRef(BdbObject)&    thePersRef )  [inline, static]

Try to convert (from a persistent reference) (regular pointer version). Definition at line 66 of file CdbBdbNTupleP2T.hh. References CdbBdbNTupleConversionImpl< T, NCOL, ELEMENT_CONVERSION_RULES >::to_transient().

template<class ELEMENT_CONVERSION_RULES = CdbBdbNTupleConversionRules_UseDefault> template<class T, unsigned int NCOL> CdbStatus CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >::convert (  CdbCPtr< CdbNTuple< T, NCOL > > &    thePtr, const ooRef(BdbObject)&    thePersRef )  [inline, static]

Try to convert (from a persistent reference). See also: CdbBdbNTupleConversionImpl::to_transient() Definition at line 55 of file CdbBdbNTupleP2T.hh. References CdbBdbNTupleConversionImpl< T, NCOL, ELEMENT_CONVERSION_RULES >::to_transient(). Referenced by CdbBdbNTupleP2T< ELEMENT_CONVERSION_RULES >::convert(), and CdbBdbNTupleProxy< T, NCOL >::redefinedFaultHandler().

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

• CdbBdbNTupleP2T.hh

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