WIP: try to load event in a tool.

Simulation/DetSimCore/CMakeLists.txt

@@ -2,12 +2,14 @@
 gaudi_subdir(DetSimCore v0r0)
 
 gaudi_depends_on_subdirs(
+    FWCore
     Simulation/DetSimInterface
 )
 
 find_package(Geant4 REQUIRED ui_all vis_all)
 include(${Geant4_USE_FILE})
-find_package(plcio)
+find_package(podio REQUIRED)
+find_package(plcio REQUIRED) 
 
 set(DetSimCore_srcs
     src/DetSimAlg.cpp
@@ -23,6 +25,6 @@ set(DetSimCore_srcs
 )
 
 gaudi_add_module(DetSimCore ${DetSimCore_srcs}
-    INCLUDE_DIRS DetSimInterface GaudiKernel Geant4 plcio
-    LINK_LIBRARIES DetSimInterface GaudiKernel Geant4 plcio
+    INCLUDE_DIRS DetSimInterface GaudiKernel Geant4 plcio ${plcio_INCLUDE_DIRS} ${podio_INCLUDE_DIRS}
+    LINK_LIBRARIES DetSimInterface GaudiKernel Geant4 plcio podio
 )

Simulation/DetSimCore/src/G4PrimaryCnvTool.cpp

@@ -6,6 +6,15 @@ DECLARE_COMPONENT(G4PrimaryCnvTool)
 
 bool G4PrimaryCnvTool::mutate(G4Event* anEvent) {
 
+    auto mcCol = m_mcParCol.get();
+    info() << "Start a new event: " << endmsg;
+    for ( auto p : *mcCol ) {
+        info() << p.getObjectID().index << " : [";
+        for ( auto it = p.daughters_begin(), end = p.daughters_end(); it != end; ++it ) {
+            info() << " " << it->getObjectID().index;
+        }
+        info() << " ]; " << endmsg;
+    }
 
     return true;
 }

Simulation/DetSimCore/src/G4PrimaryCnvTool.h

@@ -3,6 +3,10 @@
 
 #include "GaudiKernel/AlgTool.h"
 #include "DetSimInterface/IG4PrimaryCnvTool.h"
+#include "FWCore/DataHandle.h"
+
+#include "plcio/EventHeaderCollection.h"
+#include "plcio/MCParticleCollection.h"
 
 class G4PrimaryCnvTool: public extends<AlgTool, IG4PrimaryCnvTool> {
 public:
@@ -11,6 +15,9 @@ public:
 
     bool mutate(G4Event* anEvent) override;
 
+private:
+    DataHandle<plcio::MCParticleCollection> m_mcParCol{"MCParticleCol", Gaudi::DataHandle::Reader, this};
+
 };
 
 #endif