An artificial field that transforms an RNTuple column that contains the offset of collections into collection sizes.
It is only used for reading, e.g. as projected field or as an artificial field that provides the "number of" RDF columns for collections (e.g. R_rdf_sizeof_jets for a collection named jets). It is used in the templated RField<RNTupleCardinality<SizeT>> form, which represents the collection sizes either as 32bit unsigned int (std::uint32_t) or as 64bit unsigned int (std::uint64_t).
Definition at line 1714 of file RField.hxx.
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| | RCardinalityField (RCardinalityField &&other)=default |
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| | ~RCardinalityField () override=default |
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| void | AcceptVisitor (Detail::RFieldVisitor &visitor) const final |
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| const RField< RNTupleCardinality< std::uint32_t > > * | As32Bit () const |
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| const RField< RNTupleCardinality< std::uint64_t > > * | As64Bit () const |
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| RCardinalityField & | operator= (RCardinalityField &&other)=default |
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| | RFieldBase (const RFieldBase &)=delete |
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| | RFieldBase (RFieldBase &&)=default |
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| | RFieldBase (std::string_view name, std::string_view type, ENTupleStructure structure, bool isSimple, std::size_t nRepetitions=0) |
| | The constructor creates the underlying column objects and connects them to either a sink or a source.
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| virtual | ~RFieldBase ()=default |
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| RSchemaIterator | begin () |
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| RValue | BindValue (std::shared_ptr< void > objPtr) |
| | Creates a value from a memory location with an already constructed object.
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| RConstSchemaIterator | cbegin () const |
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| RConstSchemaIterator | cend () const |
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| std::unique_ptr< RFieldBase > | Clone (std::string_view newName) const |
| | Copies the field and its sub fields using a possibly new name and a new, unconnected set of columns.
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| RBulk | CreateBulk () |
| | The returned bulk is initially empty; RBulk::ReadBulk will construct the array of values.
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| template<typename T > |
| std::unique_ptr< T, typename RCreateObjectDeleter< T >::deleter > | CreateObject () const |
| | Generates an object of the field type and allocates new initialized memory according to the type.
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| template<> |
| std::unique_ptr< void, typename RFieldBase::RCreateObjectDeleter< void >::deleter > | CreateObject () const |
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| template<> |
| std::unique_ptr< void, typename ROOT::Experimental::RFieldBase::RCreateObjectDeleter< void >::deleter > | CreateObject () const |
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| RValue | CreateValue () |
| | Generates an object of the field type and wraps the created object in a shared pointer and returns it an RValue connected to the field.
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| RSchemaIterator | end () |
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| virtual size_t | GetAlignment () const =0 |
| | As a rule of thumb, the alignment is equal to the size of the type.
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| const ColumnRepresentation_t & | GetColumnRepresentative () const |
| | Returns the fColumnRepresentative pointee or, if unset, the field's default representative.
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| std::string | GetDescription () const |
| | Get the field's description.
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| std::string | GetFieldName () const |
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| virtual std::uint32_t | GetFieldVersion () const |
| | Indicates an evolution of the mapping scheme from C++ type to columns.
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| NTupleSize_t | GetNElements () const |
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| std::size_t | GetNRepetitions () const |
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| DescriptorId_t | GetOnDiskId () const |
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| std::uint32_t | GetOnDiskTypeVersion () const |
| | Return the C++ type version stored in the field descriptor; only valid after a call to ConnectPageSource()
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| const RFieldBase * | GetParent () const |
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| std::string | GetQualifiedFieldName () const |
| | Returns the field name and parent field names separated by dots ("grandparent.parent.child")
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| EState | GetState () const |
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| ENTupleStructure | GetStructure () const |
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| std::vector< RFieldBase * > | GetSubFields () |
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| std::vector< const RFieldBase * > | GetSubFields () const |
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| int | GetTraits () const |
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| std::string | GetTypeAlias () const |
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| std::string | GetTypeName () const |
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| virtual std::uint32_t | GetTypeVersion () const |
| | Indicates an evolution of the C++ type itself.
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| virtual size_t | GetValueSize () const =0 |
| | The number of bytes taken by a value of the appropriate type.
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| bool | HasDefaultColumnRepresentative () const |
| | Whether or not an explicit column representative was set.
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| bool | HasReadCallbacks () const |
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| bool | IsSimple () const |
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| RFieldBase & | operator= (const RFieldBase &)=delete |
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| RFieldBase & | operator= (RFieldBase &&)=default |
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| void | SetColumnRepresentative (const ColumnRepresentation_t &representative) |
| | Fixes a column representative.
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| void | SetDescription (std::string_view description) |
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| void | SetOnDiskId (DescriptorId_t id) |
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| virtual std::vector< RValue > | SplitValue (const RValue &value) const |
| | Creates the list of direct child values given a value for this field.
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| | RCardinalityField (std::string_view fieldName, std::string_view typeName) |
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| void | GenerateColumnsImpl () final |
| | Creates the backing columns corresponsing to the field type for writing.
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| void | GenerateColumnsImpl (const RNTupleDescriptor &) final |
| | Creates the backing columns corresponsing to the field type for reading.
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| const RColumnRepresentations & | GetColumnRepresentations () const final |
| | Implementations in derived classes should return a static RColumnRepresentations object.
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| size_t | AddReadCallback (ReadCallback_t func) |
| | Set a user-defined function to be called after reading a value, giving a chance to inspect and/or modify the value object.
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| std::size_t | Append (const void *from) |
| | Write the given value into columns.
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| virtual std::size_t | AppendImpl (const void *from) |
| | Operations on values of complex types, e.g.
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| void | Attach (std::unique_ptr< RFieldBase > child) |
| | Add a new subfield to the list of nested fields.
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| void | AutoAdjustColumnTypes (const RNTupleWriteOptions &options) |
| | When connecting a field to a page sink, the field's default column representation is subject to adjustment according to the write options.
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| virtual std::unique_ptr< RFieldBase > | CloneImpl (std::string_view newName) const =0 |
| | Called by Clone(), which additionally copies the on-disk ID.
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| virtual void | CommitClusterImpl () |
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| virtual void | ConstructValue (void *where) const =0 |
| | Constructs value in a given location of size at least GetValueSize(). Called by the base class' CreateValue().
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| const ColumnRepresentation_t & | EnsureCompatibleColumnTypes (const RNTupleDescriptor &desc) const |
| | Returns the on-disk column types found in the provided descriptor for fOnDiskId.
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| virtual std::unique_ptr< RDeleter > | GetDeleter () const |
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| virtual void | OnConnectPageSource () |
| | Called by ConnectPageSource() only once connected; derived classes may override this as appropriate.
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| void | Read (NTupleSize_t globalIndex, void *to) |
| | Populate a single value with data from the field.
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| void | Read (RClusterIndex clusterIndex, void *to) |
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| std::size_t | ReadBulk (const RBulkSpec &bulkSpec) |
| | Returns the number of newly available values, that is the number of bools in bulkSpec.fMaskAvail that flipped from false to true.
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| virtual std::size_t | ReadBulkImpl (const RBulkSpec &bulkSpec) |
| | General implementation of bulk read.
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| virtual void | ReadGlobalImpl (NTupleSize_t globalIndex, void *to) |
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| virtual void | ReadInClusterImpl (RClusterIndex clusterIndex, void *to) |
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| void | RemoveReadCallback (size_t idx) |
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| using | ColumnRepresentation_t = std::vector< EColumnType > |
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| enum class | EState { kUnconnected
, kConnectedToSink
, kConnectedToSource
} |
| | During its lifetime, a field undergoes the following possible state transitions: More...
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| using | RConstSchemaIterator = RSchemaIteratorTemplate< true > |
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| using | RSchemaIterator = RSchemaIteratorTemplate< false > |
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| static std::vector< RCheckResult > | Check (const std::string &fieldName, const std::string &typeName) |
| | Checks if the given type is supported by RNTuple.
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| static RResult< std::unique_ptr< RFieldBase > > | Create (const std::string &fieldName, const std::string &typeName) |
| | Factory method to resurrect a field from the stored on-disk type information.
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| static RResult< void > | EnsureValidFieldName (std::string_view fieldName) |
| | Check whether a given string is a valid field name.
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| static constexpr std::uint32_t | kInvalidTypeVersion = -1U |
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| static constexpr int | kTraitMappable = 0x04 |
| | A field of a fundamental type that can be directly mapped via RField<T>::Map(), i.e.
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| static constexpr int | kTraitTriviallyConstructible = 0x01 |
| | No constructor needs to be called, i.e.
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| static constexpr int | kTraitTriviallyDestructible = 0x02 |
| | The type is cleaned up just by freeing its memory. I.e. the destructor performs a no-op.
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| static constexpr int | kTraitTrivialType = kTraitTriviallyConstructible | kTraitTriviallyDestructible |
| | Shorthand for types that are both trivially constructible and destructible.
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| static std::size_t | CallAppendOn (RFieldBase &other, const void *from) |
| | Allow derived classes to call Append and Read on other (sub) fields.
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| static void | CallConstructValueOn (const RFieldBase &other, void *where) |
| | Allow derived classes to call ConstructValue(void *) and GetDeleter on other (sub) fields.
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| static void | CallReadOn (RFieldBase &other, NTupleSize_t globalIndex, void *to) |
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| static void | CallReadOn (RFieldBase &other, RClusterIndex clusterIndex, void *to) |
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| static RResult< std::unique_ptr< RFieldBase > > | Create (const std::string &fieldName, const std::string &canonicalType, const std::string &typeAlias, bool fContinueOnError=false) |
| | Factory method to resurrect a field from the stored on-disk type information.
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| static std::unique_ptr< RDeleter > | GetDeleterOf (const RFieldBase &other) |
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| static Internal::RColumn * | GetPrincipalColumnOf (const RFieldBase &other) |
| | Fields may need direct access to the principal column of their sub fields, e.g. in RRVecField::ReadBulk.
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| const ColumnRepresentation_t * | fColumnRepresentative = nullptr |
| | Points into the static vector GetColumnRepresentations().GetSerializationTypes() when SetColumnRepresentative is called.
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| std::vector< std::unique_ptr< Internal::RColumn > > | fColumns |
| | The columns are connected either to a sink or to a source (not to both); they are owned by the field.
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| std::uint32_t | fOnDiskTypeVersion = kInvalidTypeVersion |
| | C++ type version cached from the descriptor after a call to ConnectPageSource()
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| RFieldBase * | fParent |
| | Sub fields point to their mother field.
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| Internal::RColumn * | fPrincipalColumn |
| | Points into fColumns.
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| std::vector< ReadCallback_t > | fReadCallbacks |
| | List of functions to be called after reading a value.
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| std::vector< std::unique_ptr< RFieldBase > > | fSubFields |
| | Collections and classes own sub fields.
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| int | fTraits = 0 |
| | Properties of the type that allow for optimizations of collections of that type.
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| std::string | fTypeAlias |
| | A typedef or using name that was used when creating the field.
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Public Member Functions inherited from ROOT::Experimental::RFieldBase
