/data/doxygen/doxygen-1.7.3/gen/CMSSW_4_2_8/src/DataFormats/Provenance/src/BranchMapper.cc

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#include "DataFormats/Provenance/interface/BranchMapper.h"
#include "FWCore/Utilities/interface/EDMException.h"

/*
  BranchMapper

*/

namespace edm {
  BranchMapper::BranchMapper() :
    entryInfoSet_(),
    nextMapper_(),
    delayedRead_(false),
    processHistoryID_()
  { }

  BranchMapper::BranchMapper(bool delayedRead) :
    entryInfoSet_(),
    nextMapper_(),
    delayedRead_(delayedRead),
    processHistoryID_()
  { }

  BranchMapper::~BranchMapper() {}

  void
  BranchMapper::readProvenance() const {
    if (delayedRead_) {
      delayedRead_ = false;
      readProvenance_();
    }
  }

  void
  BranchMapper::insert(ProductProvenance const& entryInfo) {
    //NOTE:do not read provenance here because we only need the full
    // provenance when someone tries to access it not when doing the insert
    // doing the delay saves 20% of time when doing an analysis job
    //readProvenance();
    entryInfoSet_.insert(entryInfo);
  }
    
  boost::shared_ptr<ProductProvenance>
  BranchMapper::branchIDToProvenance(BranchID const& bid) const {
    readProvenance();
    ProductProvenance ei(bid);
    eiSet::const_iterator it = entryInfoSet_.find(ei);
    if (it == entryInfoSet_.end()) {
      if (nextMapper_) {
        return nextMapper_->branchIDToProvenance(bid);
      } else {
        return boost::shared_ptr<ProductProvenance>();
      }
    }
    return boost::shared_ptr<ProductProvenance>(new ProductProvenance(*it));
  }

  BranchID
  BranchMapper::oldProductIDToBranchID_(ProductID const& ) const {
    throw edm::Exception(errors::LogicError)
        << "Internal error:  Illegal call of oldProductIDToBranchID_.\n"
        << "Please report this error to the Framework group\n";
  }
}