Add accessor class for wrapper to allow private method access

iLCSoft · Nov 16, 2022 · cc3e755 · cc3e755
1 parent 6ab7b50
commit cc3e755
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/source/include/marlin/Processor.h b/source/include/marlin/Processor.h
@@ -30,10 +30,24 @@
 //#define m_endl std::endl 
 //----------------------------------------
 
+class MarlinProcessorWrapper;
+
 using namespace lcio ;
 
 
 namespace marlin{
+/** Helper class that gives the MarlinProcessorWrapper access to private methods
+ * where necessary. Essentially only provides a constructor from a
+ * MarlinProcessorWrapper, to at least avoid the most obvious misuses of this.
+ */
+struct MarlinWrapperPrivateAccessor {
+  MarlinWrapperPrivateAccessor(MarlinProcessorWrapper*){};
+  MarlinWrapperPrivateAccessor() = delete;
+  MarlinWrapperPrivateAccessor(const MarlinWrapperPrivateAccessor&) = delete;
+  MarlinWrapperPrivateAccessor& operator=(const MarlinWrapperPrivateAccessor&) = delete;
+  MarlinWrapperPrivateAccessor(MarlinWrapperPrivateAccessor&&) = delete;
+  MarlinWrapperPrivateAccessor& operator=(MarlinWrapperPrivateAccessor&&) = delete;
+};
 
   class ProcessorMgr ;
   //  class ProcessorParameter ;
@@ -115,6 +129,12 @@ namespace marlin{
      */
     virtual void check( LCEvent* ) { }
 
+    /**
+     * Public overload of setFirstEvent for use in the MarlinProcessorWrapper
+     */
+    virtual void setFirstEvent(bool firstEvent, MarlinWrapperPrivateAccessor) {
+      setFirstEvent(firstEvent);
+    }
 
     /** Called after data processing for clean up in the inverse order of the init()
      *  method so that resources allocated in the first processor also will be available