Meta-data for a set of ntuple clusters.
The cluster descriptor is built in two phases. In a first phase, the descriptor has only an ID. In a second phase, the event range, column group, page locations and column ranges are added. Both phases are populated by the RClusterDescriptorBuilder. Clusters usually span across all available columns but in some cases they can describe only a subset of the columns, for instance when describing friend ntuples.
Definition at line 236 of file RNTupleDescriptor.hxx.
Classes | |
class | RColumnRange |
The window of element indexes of a particular column in a particular cluster. More... | |
class | RColumnRangeIterable |
class | RPageRange |
Records the partition of data into pages for a particular column in a particular cluster. More... | |
Public Member Functions | |
RClusterDescriptor ()=default | |
RClusterDescriptor (const RClusterDescriptor &other)=delete | |
RClusterDescriptor (RClusterDescriptor &&other)=default | |
RClusterDescriptor | Clone () const |
bool | ContainsColumn (ROOT::DescriptorId_t physicalId) const |
const RColumnRange & | GetColumnRange (ROOT::DescriptorId_t physicalId) const |
RColumnRangeIterable | GetColumnRangeIterable () const |
Returns an iterator over pairs { columnId, columnRange }. The iteration order is unspecified. | |
ROOT::NTupleSize_t | GetFirstEntryIndex () const |
ROOT::DescriptorId_t | GetId () const |
std::uint64_t | GetNBytesOnStorage () const |
ROOT::NTupleSize_t | GetNEntries () const |
const RPageRange & | GetPageRange (ROOT::DescriptorId_t physicalId) const |
RClusterDescriptor & | operator= (const RClusterDescriptor &other)=delete |
RClusterDescriptor & | operator= (RClusterDescriptor &&other)=default |
bool | operator== (const RClusterDescriptor &other) const |
Private Attributes | |
ROOT::DescriptorId_t | fClusterId = ROOT::kInvalidDescriptorId |
std::unordered_map< ROOT::DescriptorId_t, RColumnRange > | fColumnRanges |
ROOT::NTupleSize_t | fFirstEntryIndex = ROOT::kInvalidNTupleIndex |
Clusters can be swapped by adjusting the entry offsets. | |
ROOT::NTupleSize_t | fNEntries = ROOT::kInvalidNTupleIndex |
std::unordered_map< ROOT::DescriptorId_t, RPageRange > | fPageRanges |
Friends | |
class | Internal::RClusterDescriptorBuilder |
#include <ROOT/RNTupleDescriptor.hxx>
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ROOT::Experimental::RClusterDescriptor ROOT::Experimental::RClusterDescriptor::Clone | ( | ) | const |
Definition at line 281 of file RNTupleDescriptor.cxx.
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Definition at line 453 of file RNTupleDescriptor.hxx.
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Definition at line 449 of file RNTupleDescriptor.hxx.
ROOT::Experimental::RClusterDescriptor::RColumnRangeIterable ROOT::Experimental::RClusterDescriptor::GetColumnRangeIterable | ( | ) | const |
Returns an iterator over pairs { columnId, columnRange }. The iteration order is unspecified.
Definition at line 1329 of file RNTupleDescriptor.cxx.
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Definition at line 447 of file RNTupleDescriptor.hxx.
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Definition at line 446 of file RNTupleDescriptor.hxx.
std::uint64_t ROOT::Experimental::RClusterDescriptor::GetNBytesOnStorage | ( | ) | const |
Definition at line 270 of file RNTupleDescriptor.cxx.
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Definition at line 448 of file RNTupleDescriptor.hxx.
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Definition at line 450 of file RNTupleDescriptor.hxx.
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bool ROOT::Experimental::RClusterDescriptor::operator== | ( | const RClusterDescriptor & | other | ) | const |
Definition at line 264 of file RNTupleDescriptor.cxx.
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Definition at line 237 of file RNTupleDescriptor.hxx.
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Definition at line 424 of file RNTupleDescriptor.hxx.
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Definition at line 430 of file RNTupleDescriptor.hxx.
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Clusters can be swapped by adjusting the entry offsets.
Definition at line 426 of file RNTupleDescriptor.hxx.
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Definition at line 428 of file RNTupleDescriptor.hxx.
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Definition at line 431 of file RNTupleDescriptor.hxx.