Make sure to only read and register collections once

key4hep · Nov 17, 2023 · 1570384 · 1570384
1 parent cf71277
commit 1570384
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/k4FWCore/include/k4FWCore/PodioDataSvc.h b/k4FWCore/include/k4FWCore/PodioDataSvc.h
@@ -69,6 +69,11 @@ class PodioDataSvc : public DataSvc {
   const std::string_view getCollectionType(const std::string& collName);
 
   template <typename T> StatusCode readCollection(const std::string& collName) {
+    DataObject* objectPtr = nullptr;
+    if (DataSvc::findObject("/Event", "/" + collName, objectPtr)) {
+      debug() << "Collection " << collName << " already read, not reading it again" << endmsg;
+      return StatusCode::SUCCESS;
+    }
     const T* collection(nullptr);
     collection = static_cast<const T*>(m_eventframe.get(collName));
     if (collection == nullptr) {