AssnsGroup.cc

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#include "art/Framework/Principal/AssnsGroup.h"
// vim: set sw=2:

#include "cetlib_except/demangle.h"

art::EDProduct const*
art::AssnsGroup::getIt() const
{
  return uniqueProduct();
}

art::EDProduct const*
art::AssnsGroup::anyProduct() const
{
  art::EDProduct const* result = Group::anyProduct();
  if (result == nullptr) {
    result = partnerProduct_.get();
  }
  return result;
}

art::EDProduct const*
art::AssnsGroup::uniqueProduct() const
{
  throw Exception(errors::LogicError, "AmbiguousProduct")
    << cet::demangle_symbol(typeid(*this).name())
    << " was asked for a held product (uniqueProduct()) "
    << "without specifying which one was wanted.\n";
}

art::EDProduct const*
art::AssnsGroup::uniqueProduct(TypeID const& wanted_wrapper_type) const
{
  EDProduct const* retval = nullptr;
  if (wanted_wrapper_type == partnerWrapperType_) {
    retval = partnerProduct_.get();
  } else {
    retval = Group::uniqueProduct();
  }
  return retval;
}

bool
art::AssnsGroup::resolveProductIfAvailable(
  TypeID const& wanted_wrapper_type) const
{
  // Ask us for something we can do.
  if (!(wanted_wrapper_type == producedWrapperType() ||
        wanted_wrapper_type == partnerWrapperType_)) {
    throwResolveLogicError(wanted_wrapper_type);
  }
  bool result = Group::resolveProductIfAvailable(producedWrapperType());
  if (!(productUnavailable() ||
        (result = uniqueProduct(wanted_wrapper_type))) &&
      Group::uniqueProduct() != nullptr) {
    if (wanted_wrapper_type == partnerWrapperType_) {
      // We know at this point that our wanted object has not been read
      // or created yet.
      result = makePartner(wanted_wrapper_type, partnerProduct_);
    }
  }
  return result;
}

void
art::AssnsGroup::removeCachedProduct() const
{
  Group::removeCachedProduct();
  partnerProduct_.reset();
}