Template specializations for C++ std::optional and std::unique_ptr.
The field for values that may or may not be present in an entry. Parent class for unique pointer field and optional field. A nullable field cannot be instantiated itself but only its descendants. The RNullableField takes care of the on-disk representation. Child classes are responsible for the in-memory representation. Nullable fields use a (Split)Index[64|32] column to point to the available items.
Definition at line 167 of file RFieldSTLMisc.hxx.
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| | RNullableField (RNullableField &&other)=default |
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| | ~RNullableField () override=default |
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| void | AcceptVisitor (Detail::RFieldVisitor &visitor) const final |
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| RNullableField & | operator= (RNullableField &&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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| RConstSchemaIterator | begin () const |
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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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| std::unique_ptr< void, typename RFieldBase::RCreateObjectDeleter< void >::deleter > | CreateObject () const |
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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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| 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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| RConstSchemaIterator | end () const |
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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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| RColumnRepresentations::Selection_t | GetColumnRepresentatives () const |
| | Returns the fColumnRepresentative pointee or, if unset, the field's default representative.
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| const std::string & | GetDescription () const |
| | Get the field's description.
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| const 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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| std::size_t | GetNRepetitions () const |
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| DescriptorId_t | GetOnDiskId () const |
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| std::uint32_t | GetOnDiskTypeChecksum () const |
| | Return checksum stored in the field descriptor; only valid after a call to ConnectPageSource(), if the field stored a type checksum.
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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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| const std::string & | GetTypeAlias () const |
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| virtual std::uint32_t | GetTypeChecksum () const |
| | Return the current TClass reported checksum of this class. Only valid if kTraitTypeChecksum is set.
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| const 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 | SetColumnRepresentatives (const RColumnRepresentations::Selection_t &representatives) |
| | 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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| | RNullableField (std::string_view fieldName, std::string_view typeName, std::unique_ptr< RFieldBase > itemField) |
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| std::size_t | AppendNull () |
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| std::size_t | AppendValue (const void *from) |
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| void | CommitClusterImpl () final |
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| void | GenerateColumns () final |
| | Implementations in derived classes should create the backing columns corresponsing to the field type for writing.
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| void | GenerateColumns (const RNTupleDescriptor &) final |
| | Implementations in derived classes should create the backing columns corresponsing to the field type for reading.
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| const RFieldBase::RColumnRepresentations & | GetColumnRepresentations () const final |
| | Implementations in derived classes should return a static RColumnRepresentations object.
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| RClusterIndex | GetItemIndex (NTupleSize_t globalIndex) |
| | Given the index of the nullable field, returns the corresponding global index of the subfield or, if it is null, returns kInvalidClusterIndex.
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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 | 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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| void * | CreateObjectRawPtr () const |
| | Factory method for the field's type. The caller owns the returned pointer.
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| const ColumnRepresentation_t & | EnsureCompatibleColumnTypes (const RNTupleDescriptor &desc, std::uint16_t representationIndex) const |
| | Returns the on-disk column types found in the provided descriptor for fOnDiskId and the given representation index.
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| template<typename... ColumnCppTs> |
| void | GenerateColumnsImpl () |
| | For writing, use the currently set column representative.
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| template<std::uint32_t ColumnIndexT, typename HeadT , typename... TailTs> |
| void | GenerateColumnsImpl (const ColumnRepresentation_t &representation, std::uint16_t representationIndex) |
| | Helpers for generating columns.
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| template<typename... ColumnCppTs> |
| void | GenerateColumnsImpl (const RNTupleDescriptor &desc) |
| | For reading, use the on-disk column list.
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| virtual std::unique_ptr< RDeleter > | GetDeleter () const |
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| virtual RExtraTypeInfoDescriptor | GetExtraTypeInfo () const |
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| virtual bool | HasExtraTypeInfo () const |
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| virtual void | OnConnectPageSource () |
| | Called by ConnectPageSource() 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) |
| | Populate a single value with data from the field.
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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 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 constexpr int | kTraitTypeChecksum = 0x08 |
| | The TClass checksum is set and valid.
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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 * | CallCreateObjectRawPtrOn (RFieldBase &other) |
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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 continueOnError=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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| Internal::RColumn * | fAuxiliaryColumn = nullptr |
| | Some fields have a second column in its column representation.
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| std::vector< std::unique_ptr< Internal::RColumn > > | fAvailableColumns |
| | 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::vector< std::reference_wrapper< const ColumnRepresentation_t > > | fColumnRepresentatives |
| | Pointers into the static vector GetColumnRepresentations().GetSerializationTypes() when SetColumnRepresentatives is called.
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| std::uint32_t | fOnDiskTypeChecksum = 0 |
| | TClass checksum cached from the descriptor after a call to ConnectPageSource().
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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 = nullptr |
| | All fields that have columns have a distinct main column.
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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
