This package is still under development. You can browse the code here. Currently, it only support conversion from transient to persistency, not the other way around. And not all the classes have Root persistency yet.

• Atlfast Root Data Classes
  Currently, 7 DataObject classes have been defined for the Atlfast. They are:
  • AtlfastCellCollectionRoot.h
  • AtlfastClusterCollectionRoot.h
  • AtlfastTrackCollectionRoot.h
  • AtlfastJetCollectionRoot.h
  • AtlfastEventHeaderRoot.h
  • AtlfastRecParticleRoot.h
  • McEventCollectionRoot.h
• The association from Cluster to Cell (and Jet to Cluster) is kept in the Root classes, using ATTableMap.
• McEventCollectionRoot uses two other ROOT classes for HepMc. One is HepMcParticleRoot and the other is HepMcVertexRoot .
• Checkout instruction.
  To run the root persistency, you need to check out the following packages, then configure and build as ususal.
  setenv CVSROOT /afs/rhic/usatlas/project/localcvs
  cp -a ~hma/Athena/2.0.1-Root-keep/src/RootSvc .
  cvs co -d GaudiRootCnvSvc packages/AthenaRoot/GaudiRootCnvSvc
  cvs co -d AtlfastGaudiRoot packages/AthenaRoot/AtlfastGaudiRoot
  cvs co -d EventSelectorGaudiRoot packages/AthenaRoot/EventSelectorGaudiRoot
  cvs co -d EventInfoGaudiRoot packages/AthenaRoot/EventInfoGaudiRoot
  
• JobOptions
  There is one additional JobOptions file for writing the Atlfast objects to root. It is in share/ directory in the package. Take a look here . This file should be added to the top jobOptions file, as is done at the bottom of this file .
• Analysis Root Macro
  To help with analysis of Atlfast using root session, a few helper classes are created. They are compiled in the library libAtlfastGaudiRootDataDef.so, so that they can be loaded into interactive root session. Currently there are:
  • ACluster: a helper class for interpreting each row in the cluster table.
  • ACell: a helper class for interpreting each row in the cluster table.
  
  A root macro is provided in the directory share/, AtlfastReadEvent.C . It reads in the root file, iterate over the cells and clusters to make some histograms. Before running ROOT, you should make sure the local installed library directory is in LD_LIBRARY_PATH because that is where the DataDef lib is located.