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#include "DataFormats/Provenance/interface/ProductDependencies.h"
#include "DataFormats/Provenance/interface/ProductDescription.h"
namespace edm {
void BranchChildren::append_(map_t const& lookup,
BranchID item,
BranchIDSet& itemSet,
std::map<BranchID, BranchID> const& droppedToKeptAlias) const {
auto const iter = lookup.find(item);
if (iter != lookup.end()) {
BranchIDSet const& branchIDs = iter->second;
for (BranchID const& branchID : branchIDs) {
auto it = droppedToKeptAlias.find(branchID);
// Insert the BranchID of the children into the set of descendants.
// If the insert succeeds, append recursively.
if (it == droppedToKeptAlias.end()) {
// Normal case. Not an EDAlias.
if (itemSet.insert(branchID).second) {
append_(lookup, branchID, itemSet, droppedToKeptAlias);
}
} else {
// In this case, we want to put the EDAlias in the
// set of things to drop because that is what really
// needs to be dropped, but the recursive search in
// the lookup map must continue with the original BranchID
// because that is what the lookup map contains.
if (itemSet.insert(it->second).second) {
append_(lookup, branchID, itemSet, droppedToKeptAlias);
}
}
}
}
}
void BranchChildren::clear() { childLookup_.clear(); }
void BranchChildren::insertEmpty(BranchID parent) { childLookup_.insert(std::make_pair(parent, BranchIDSet())); }
void BranchChildren::insertChild(BranchID parent, BranchID child) { childLookup_[parent].insert(child); }
void BranchChildren::appendToDescendants(ProductDescription const& parent,
BranchIDSet& descendants,
std::map<BranchID, BranchID> const& droppedToKeptAlias) const {
descendants.insert(parent.branchID());
// A little tricky here. The child lookup map is filled with the
// BranchID of the original product even if there was an EDAlias
// and the EDAlias was saved and the original branch dropped.
append_(childLookup_, parent.originalBranchID(), descendants, droppedToKeptAlias);
}
} // namespace edm
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