lordgamez commented on a change in pull request #866:
URL: https://github.com/apache/nifi-minifi-cpp/pull/866#discussion_r468496921



##########
File path: extensions/libarchive/MergeContent.cpp
##########
@@ -342,6 +362,56 @@ std::shared_ptr<core::FlowFile> 
ZipMerge::merge(core::ProcessContext *context, c
   return flowFile;
 }
 
+void AttributeMerger::mergeAttributes() {
+  std::map<std::string, std::string> commonAttributes = getCommonAttributes();
+
+  for (const auto& pair : commonAttributes) {
+    session_->putAttribute(mergeFlow_, pair.first, pair.second);
+  }
+}
+
+std::map<std::string, std::string> AttributeMerger::getCommonAttributes() {
+  std::map<std::string, std::string> commonAttributes;

Review comment:
       This would require creating a new map for every intersection's output as 
it seems I cannot update the same map for multiple intersections, that would be 
costly.




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