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AODBcRewriter : remapping matching indices in O2fwdtrack table #2418

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AODBcRewriter : remapping matching indices in O2fwdtrack table #2418

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31 changes: 29 additions & 2 deletions MC/utils/AODBcRewriter.C
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Original file line number Diff line number Diff line change
Expand Up @@ -900,6 +900,8 @@ static const PermMap *findPermByPrefix(
// follow the published parent permutation;
// * every fIndexTracks* / fIndexMFTTracks / fIndexFwdTracks reference is
// remapped through it in processPasteJoinTables.
// * O2fwdtrack match indices (fIndexMFTTracks, fIndexFwdTracks_MatchMCHTrack)
// are remapped here after MFT/Fwd permutations are known.
static bool isCollGroupedTrackTable(const std::string &tname) {
static const char *kPrefixes[] = {"O2track_iu", "O2track",
"O2mfttrack", "O2fwdtrack"};
Expand All @@ -916,6 +918,8 @@ static void stage1b_reorderTrackTables(
const PermMap *collPermP = findPermByPrefix(allPerms, "O2collision_");
if (!collPermP) return; // no collisions present — nothing to regroup against

std::unordered_map<std::string, std::vector<Long64_t>> deferredFwd;

TIter it(dirIn->GetListOfKeys());
while (TKey *key = static_cast<TKey *>(it())) {
if (TString(key->GetClassName()) != "TTree") continue;
Expand Down Expand Up @@ -960,9 +964,32 @@ static void stage1b_reorderTrackTables(
rowOrder.reserve(nSrc);
for (auto &e : entries) rowOrder.push_back(e.srcRow);

PermMap srcToOut(nSrc, -1);
for (Long64_t outRow = 0; outRow < (Long64_t)rowOrder.size(); ++outRow)
srcToOut[rowOrder[outRow]] = (Int_t)outRow;
allPerms[tname] = std::move(srcToOut);

if (TString(tname.c_str()).BeginsWith("O2fwdtrack")) {
deferredFwd[tname] = std::move(rowOrder);
continue;
}

// Reorder rows and remap fIndexCollisions values through collPerm.
PermMap perm = rewriteTable(src, dirOut, rowOrder, "fIndexCollisions", *collPermP);
allPerms[tname] = std::move(perm);
rewriteTable(src, dirOut, rowOrder, "fIndexCollisions", *collPermP);
written.insert(tname);
}

const PermMap *mftPerm = findPermByPrefix(allPerms, "O2mfttrack");
const PermMap *fwdPerm = findPermByPrefix(allPerms, "O2fwdtrack");
for (auto &[tname, rowOrder] : deferredFwd) {
TTree *src = dynamic_cast<TTree *>(dirIn->Get(tname.c_str()));
if (!src) continue;
std::vector<ExtraRemap> extraRemaps;
if (mftPerm && src->GetBranch("fIndexMFTTracks"))
extraRemaps.push_back({"fIndexMFTTracks", mftPerm});
if (fwdPerm && src->GetBranch("fIndexFwdTracks_MatchMCHTrack"))
extraRemaps.push_back({"fIndexFwdTracks_MatchMCHTrack", fwdPerm});
rewriteTable(src, dirOut, rowOrder, "fIndexCollisions", *collPermP, extraRemaps);
written.insert(tname);
}
}
Expand Down
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