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/*----------------------------------------------------------------------
ProductIDToBranchID: Free functions to map between ProductIDs and BranchIDs
----------------------------------------------------------------------*/
#include "DataFormats/Provenance/interface/ProductIDToBranchID.h"
namespace edm {
BranchID productIDToBranchID(ProductID const& pid, BranchIDLists const& lists, BranchListIndexes const& indexes) {
if (pid.isValid()) {
size_t procIndex = pid.processIndex() - 1;
if (procIndex < indexes.size()) {
BranchListIndex blix = indexes[procIndex];
if (blix < lists.size()) {
BranchIDList const& blist = lists[blix];
size_t prodIndex = pid.productIndex() - 1;
if (prodIndex < blist.size()) {
BranchID::value_type bid = blist[prodIndex];
return BranchID(bid);
}
}
}
}
return BranchID();
}
} // namespace edm
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