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Title: Custom member streamer for CalArray::mData by sawenzel · Pull Request #14830 · AliceO2Group/AliceO2 · GitHub

Open Graph Title: Custom member streamer for CalArray::mData by sawenzel · Pull Request #14830 · AliceO2Group/AliceO2

X Title: Custom member streamer for CalArray::mData by sawenzel · Pull Request #14830 · AliceO2Group/AliceO2

Description: This commit expands on #14427 and fixes the issue brought up in https://its.cern.ch/jira/browse/O2-4671. After debugging/testing it turns out that the approach taken via a customer streamer for std::vector does not take effect in the ROOT/IO because apparently ROOT still prefers to use the CollectionProxy for std::vector and does not employ the custom streamer. Instead, after discussion with @pcanal, this commit proposes to implement a custom stream just for the mData data member of CalArray. This is the only place where we use o2::tpc::PadFlags in IO and it fixes the problem when reading CCDB objects containing such data. I have verified that the following code o2-ccdb-downloadccdbfile -p TPC/Calib/IDC_PadStatusMap_A -t 1731274461770 -d ./ -o tpc_idc.root --no-preserve-path root tpc_idc.root gFile->Get>("ccdb_object") correctly executes the custom streamer function. Note that there is also no need to make the code ROOT version dependent. We need to fix the reading in any case and the writing will just stay the same. Concerning situations, where future classes will write data containing std::vector we should be protected by the fact that this bug has been fixed >= ROOT 6.36 in any case. This commit relates also to root-project/root#17009

Open Graph Description: This commit expands on #14427 and fixes the issue brought up in https://its.cern.ch/jira/browse/O2-4671. After debugging/testing it turns out that the approach taken via a customer streamer for std...

X Description: This commit expands on #14427 and fixes the issue brought up in https://its.cern.ch/jira/browse/O2-4671. After debugging/testing it turns out that the approach taken via a customer streamer for std...

Opengraph URL: https://github.com/AliceO2Group/AliceO2/pull/14830

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