A helper class for piece-wise construction of an RClusterDescriptor.

The cluster descriptor builder starts from a summary-only cluster descriptor and allows for the piecewise addition of page locations.

Definition at line 940 of file RNTupleDescriptor.hxx.

Public Member Functions
	RClusterDescriptorBuilder (DescriptorId_t clusterId, std::uint64_t firstEntryIndex, std::uint64_t nEntries)
	Make an empty cluster descriptor builder.

RClusterDescriptorBuilder &	AddDeferredColumnRanges (const RNTupleDescriptor &desc)
	Add column and page ranges for deferred columns missing in this cluster.

RResult< void >	CommitColumnRange (DescriptorId_t physicalId, std::uint64_t firstElementIndex, std::uint32_t compressionSettings, const RClusterDescriptor::RPageRange &pageRange)

RResult< RClusterDescriptor >	MoveDescriptor ()
	Move out the full cluster descriptor including page locations.

Private Attributes
RClusterDescriptor	fCluster

#include <ROOT/RNTupleDescriptor.hxx>

Constructor & Destructor Documentation

◆ RClusterDescriptorBuilder()

ROOT::Experimental::RClusterDescriptorBuilder::RClusterDescriptorBuilder	(	DescriptorId_t	clusterId,
		std::uint64_t	firstEntryIndex,
		std::uint64_t	nEntries
	)

inline

Make an empty cluster descriptor builder.

Definition at line 946 of file RNTupleDescriptor.hxx.

Member Function Documentation

◆ AddDeferredColumnRanges()

ROOT::Experimental::RClusterDescriptorBuilder & ROOT::Experimental::RClusterDescriptorBuilder::AddDeferredColumnRanges ( const RNTupleDescriptor & desc )

Add column and page ranges for deferred columns missing in this cluster.

The locator type for the synthesized page ranges is kTypePageZero. All the page sources must be able to populate the 'zero' page from such locator. Any call to CommitColumnRange() should happen before calling this function.

Definition at line 514 of file RNTupleDescriptor.cxx.

◆ CommitColumnRange()

ROOT::Experimental::RResult< void > ROOT::Experimental::RClusterDescriptorBuilder::CommitColumnRange	(	DescriptorId_t	physicalId,
		std::uint64_t	firstElementIndex,
		std::uint32_t	compressionSettings,
		const RClusterDescriptor::RPageRange &	pageRange
	)

Definition at line 494 of file RNTupleDescriptor.cxx.

◆ MoveDescriptor()

ROOT::Experimental::RResult< ROOT::Experimental::RClusterDescriptor > ROOT::Experimental::RClusterDescriptorBuilder::MoveDescriptor ( )

Move out the full cluster descriptor including page locations.

Definition at line 567 of file RNTupleDescriptor.cxx.

Member Data Documentation

◆ fCluster

RClusterDescriptor ROOT::Experimental::RClusterDescriptorBuilder::fCluster

private

Definition at line 942 of file RNTupleDescriptor.hxx.

Libraries for ROOT::Experimental::RClusterDescriptorBuilder:

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The documentation for this class was generated from the following files:

tree/ntuple/v7/inc/ROOT/RNTupleDescriptor.hxx
tree/ntuple/v7/src/RNTupleDescriptor.cxx

Public Member Functions

Private Attributes