Add a utility function to return objects index inside a provided LCCo…

…llection
iLCSoft · Aug 31, 2022 · 4668a95 · 4668a95
1 parent 635db54
commit 4668a95
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/src/cpp/include/UTIL/LCCollectionTools.h b/src/cpp/include/UTIL/LCCollectionTools.h
@@ -0,0 +1,20 @@
+#ifndef UTIL_LCCollectionTools_H
+#define UTIL_LCCollectionTools_H 1
+
+#include "EVENT/LCObject.h"
+#include "EVENT/LCCollection.h"
+
+namespace UTIL{
+    /** Extract object index inside a given LCCollection.
+    * @author Bohdan Dudar
+    * @version August 2022
+    */
+    int getElementIndex(const EVENT::LCObject* item, EVENT::LCCollection* collection){
+        for(int i=0; i < collection->getNumberOfElements(); ++i){
+            if ( item == collection->getElementAt(i) ) return i;
+        }
+        return -1;
+    }
+}
+
+#endif