[ntuple] Remove RNTupleOpenSpec constructor argument

Author: enirolf

tree/ntuple/v7/inc/ROOT/RNTupleProcessor.hxx

@@ -168,10 +168,7 @@ protected:
    ///
    /// \note Before processing, a model *must* exist. However, this is handled downstream by the RNTupleProcessor's
    /// factory functions (CreateSingle, CreateChain and CreateJoin) and constructors.
-   RNTupleProcessor(const std::vector<RNTupleOpenSpec> &ntuples, std::unique_ptr<RNTupleModel> model)
-      : fNTuples(ntuples), fModel(std::move(model))
-   {
-   }
+   RNTupleProcessor(std::unique_ptr<RNTupleModel> model) : fModel(std::move(model)) {}
 
 public:
    RNTupleProcessor(const RNTupleProcessor &) = delete;

tree/ntuple/v7/src/RNTupleProcessor.cxx

@@ -145,7 +145,7 @@ void ROOT::Experimental::RNTupleProcessor::ConnectField(RFieldContext &fieldCont
 
 ROOT::Experimental::RNTupleSingleProcessor::RNTupleSingleProcessor(const RNTupleOpenSpec &ntuple,
                                                                    std::unique_ptr<RNTupleModel> model)
-   : RNTupleProcessor({ntuple}, std::move(model)), fNTupleSpec(ntuple)
+   : RNTupleProcessor(std::move(model)), fNTupleSpec(ntuple)
 {
    if (!fModel) {
       fPageSource = Internal::RPageSource::Create(fNTupleSpec.fNTupleName, fNTupleSpec.fStorage);
@@ -217,7 +217,7 @@ void ROOT::Experimental::RNTupleSingleProcessor::Connect()
 
 ROOT::Experimental::RNTupleChainProcessor::RNTupleChainProcessor(
    std::vector<std::unique_ptr<RNTupleProcessor>> processors, std::unique_ptr<RNTupleModel> model)
-   : RNTupleProcessor({}, std::move(model)), fInnerProcessors(std::move(processors))
+   : RNTupleProcessor(std::move(model)), fInnerProcessors(std::move(processors))
 {
    fInnerNEntries.assign(fInnerProcessors.size(), kInvalidNTupleIndex);
 
@@ -304,8 +304,9 @@ ROOT::NTupleSize_t ROOT::Experimental::RNTupleChainProcessor::LoadEntry(ROOT::NT
 
 ROOT::Experimental::RNTupleJoinProcessor::RNTupleJoinProcessor(const RNTupleOpenSpec &mainNTuple,
                                                                std::unique_ptr<RNTupleModel> model)
-   : RNTupleProcessor({mainNTuple}, nullptr)
+   : RNTupleProcessor(nullptr)
 {
+   fNTuples.emplace_back(mainNTuple);
    fPageSource = Internal::RPageSource::Create(mainNTuple.fNTupleName, mainNTuple.fStorage);
    fPageSource->Attach();