SGVersionedKey.h File Reference

#include <iostream>
#include <string>

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Classes
class	SG::ObjectWithVersion
	associate a data object with its VersionedKey The object is held by a ReadHandle to delay its retrieval in case the user is interested only in the versionedKey More...
class	SG::VersionedKey
	a StoreGateSvc key with a version number. Notice that StoreGate does not order multiple instances of an object with a given key by version number. A generic retrieve will always return the first version recorded. For example, if object ("MyKey",1) is recorded _before__ ("MyKey", 2) a sg.retrieve(pObj,"MyKey") will return ("MyKey",1). StoreGateSvc provides retrieveAllVersions and retrieveHighestVersion, which offer a better-defined behaviour. More...

Namespaces
	SG
	Forward declaration.

Functions
bool	operator< (const SG::VersionedKey &lhs, const SG::VersionedKey &rhs)
	sort according to highest key version More...
std::ostream &	SG::operator<< (std::ostream &ost, const SG::VersionedKey &k)

Detailed Description

defines a StoreGateSvc key with a version number

Definition in file SGVersionedKey.h.

Function Documentation

operator<()

bool operator<	(	const SG::VersionedKey &	lhs,
		const SG::VersionedKey &	rhs
	)

sort according to highest key version

Definition at line 91 of file SGVersionedKey.cxx.

                                                                       {
  std::string lhskey;
  unsigned char lhsVersion(0);
  lhs.decode(lhskey, lhsVersion);
  unsigned char rhsVersion(0);
  std::string rhskey;
  rhs.decode(rhskey, rhsVersion);
  int keyCompare(strcmp(lhskey.c_str(), rhskey.c_str()));
  return ( ( keyCompare < 0) ||
       ( (keyCompare == 0) && (lhsVersion < rhsVersion) ) ) ;
      
}