MetaData can alter how the xAOD backend transforms data. Specifically, it can define new variables, etc. It is designed to support this on the client side.

You can define a method return type (fixes #156)
You can define a C++ only function (fixes #155)
You can define new collections from the event object (fixes #176)

Some more details:

Metadata errors reported for malformed metadata
These changes work for both CMS and ATLAS

The client front-end needs to have a nicer interface than the .MetaData(dict) call. However, whatever the client uses will boild down to these calls.

Will remain a draft:

[x] All the issues for metadata are taken care of
[x] A test on the atlas xaod backend (of old and new)
[x] A test on the cms aod backend (of old and new)
[x] Remove the temp commented out code for collections and variables, etc.

Codecov Report

Merging #177 (02c731a) into master (3ee2d8a) will increase coverage by 0.64%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #177      +/-   ##
==========================================
+ Coverage   93.73%   94.37%   +0.64%     
==========================================
  Files          24       25       +1     
  Lines        1309     1370      +61     
  Branches      145      165      +20     
==========================================
+ Hits         1227     1293      +66     
+ Misses         53       48       -5     
  Partials       29       29

Flag	Coverage Δ
unittests	`94.37% <100.00%> (+0.64%)`	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
func_adl_xAOD/common/ast_to_cpp_translator.py	`89.31% <ø> (ø)`
func_adl_xAOD/atlas/xaod/event_collections.py	`100.00% <100.00%> (ø)`
func_adl_xAOD/atlas/xaod/executor.py	`100.00% <100.00%> (ø)`
func_adl_xAOD/cms/aod/cms_functions.py	`88.88% <100.00%> (+1.38%)`	:arrow_up:
func_adl_xAOD/cms/aod/event_collections.py	`100.00% <100.00%> (+6.45%)`	:arrow_up:
func_adl_xAOD/cms/aod/executor.py	`96.42% <100.00%> (+3.57%)`	:arrow_up:
func_adl_xAOD/common/cpp_ast.py	`100.00% <100.00%> (ø)`
func_adl_xAOD/common/cpp_types.py	`100.00% <100.00%> (ø)`
func_adl_xAOD/common/event_collections.py	`100.00% <100.00%> (+3.44%)`	:arrow_up:
func_adl_xAOD/common/executor.py	`100.00% <100.00%> (+1.16%)`	:arrow_up:
... and 3 more

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iris-hep / func_adl_xAOD

Support MetaData #177

Codecov Report