BranchIDListHelper.h

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#ifndef FWCore_Framework_BranchIDListHelper_h
#define FWCore_Framework_BranchIDListHelper_h
 
#include "DataFormats/Provenance/interface/BranchListIndex.h"
#include "DataFormats/Provenance/interface/BranchIDList.h"
#include "DataFormats/Provenance/interface/ProductID.h"
#include "DataFormats/Provenance/interface/ProvenanceFwd.h"
 
#include <map>
#include <vector>
#include <limits>
 
namespace edm {
 
  class BranchIDListHelper {
  public:
    typedef std::pair<BranchListIndex, ProductIndex> IndexPair;
    typedef std::multimap<BranchID, IndexPair> BranchIDToIndexMap;
 
    BranchIDListHelper();
 
    //CMS-THREADING called when a new file is opened
    bool updateFromInput(BranchIDLists const& bidlists);
 
    void updateFromParent(BranchIDLists const& bidlists);
 
    void fixBranchListIndexes(BranchListIndexes& indexes) const;
 
    void updateFromRegistry(ProductRegistry const& reg);
 
    //CMS-THREADING this is called in SubJob::beginJob
    BranchIDLists& mutableBranchIDLists() { return branchIDLists_; }
 
    //Used by the EventPrincipal
    BranchIDLists const& branchIDLists() const { return branchIDLists_; }
    BranchIDToIndexMap const& branchIDToIndexMap() const { return branchIDToIndexMap_; }
    BranchListIndex producedBranchListIndex() const { return producedBranchListIndex_; }
    bool hasProducedProducts() const { return producedBranchListIndex_ != std::numeric_limits<BranchListIndex>::max(); }
 
  private:
    BranchIDLists branchIDLists_;
    BranchIDToIndexMap branchIDToIndexMap_;
    std::vector<BranchListIndex> inputIndexToJobIndex_;
    BranchListIndex producedBranchListIndex_;
    BranchIDLists::size_type nAlreadyCopied_;
  };
}  // namespace edm
 
#endif