Struct PlainTermEncoding 

pub struct PlainTermEncoding;

Implementations

impl PlainTermEncoding

pub fn data_type() -> DataType

Returns the type of the PlainTermEncoding.

The type of the PlainTermEncoding is statically known and cannot be configured.

pub fn encode_term( &self, term: ThinResult<TermRef<'_>>, ) -> DFResult<PlainTermScalar>

Encodes the term as a PlainTermScalar.

Trait Implementations

impl Debug for PlainTermEncoding

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl TermDecoder<PlainTermEncoding> for DefaultPlainTermDecoder

Extracts a sequence of term references from the given array.

type Term<'data> = TermRef<'data>

The resulting value type of decoding an RDF term.

fn decode_terms( array: &<PlainTermEncoding as TermEncoding>::Array, ) -> impl Iterator<Item = ThinResult<Self::Term<'_>>>

Allows extracting an iterator over all RDF terms in array that are compatible with this decoder (see TermDecoder for more information).

fn decode_term( scalar: &<PlainTermEncoding as TermEncoding>::Scalar, ) -> ThinResult<Self::Term<'_>>

Allows extracting an iterator over all RDF terms in array that are compatible with this decoder (see TermDecoder for more information).

impl TermDecoder<PlainTermEncoding> for GraphNameRefPlainTermDecoder

Extracts a sequence of term references from the given array.

type Term<'data> = GraphNameRef<'data>

The resulting value type of decoding an RDF term.

fn decode_terms( array: &<PlainTermEncoding as TermEncoding>::Array, ) -> impl Iterator<Item = ThinResult<Self::Term<'_>>>

Allows extracting an iterator over all RDF terms in array that are compatible with this decoder (see TermDecoder for more information).

fn decode_term( scalar: &<PlainTermEncoding as TermEncoding>::Scalar, ) -> ThinResult<Self::Term<'_>>

Allows extracting an iterator over all RDF terms in array that are compatible with this decoder (see TermDecoder for more information).

impl TermEncoder<PlainTermEncoding> for BooleanPlainTermEncoder

type Term<'data> = Boolean

The value type that is being encoded.

fn encode_terms<'data>( terms: impl IntoIterator<Item = ThinResult<Self::Term<'data>>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Array>

Allows encoding an iterator over RDF terms in an Arrow array.

fn encode_term( term: ThinResult<Self::Term<'_>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Scalar>

Allows encoding a scalar RDF term in an Arrow scalar.

impl TermEncoder<PlainTermEncoding> for DefaultPlainTermEncoder

type Term<'data> = TermRef<'data>

The value type that is being encoded.

fn encode_terms<'data>( terms: impl IntoIterator<Item = ThinResult<Self::Term<'data>>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Array>

Allows encoding an iterator over RDF terms in an Arrow array.

fn encode_term( term: ThinResult<Self::Term<'_>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Scalar>

Allows encoding a scalar RDF term in an Arrow scalar.

impl TermEncoder<PlainTermEncoding> for SimpleLiteralRefPlainTermEncoder

type Term<'data> = SimpleLiteralRef<'data>

The value type that is being encoded.

fn encode_terms<'data>( terms: impl IntoIterator<Item = ThinResult<Self::Term<'data>>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Array>

Allows encoding an iterator over RDF terms in an Arrow array.

fn encode_term( term: ThinResult<Self::Term<'_>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Scalar>

Allows encoding a scalar RDF term in an Arrow scalar.

impl TermEncoder<PlainTermEncoding> for TypedValueRefPlainTermEncoder

type Term<'data> = TypedValueRef<'data>

The value type that is being encoded.

fn encode_terms<'data>( terms: impl IntoIterator<Item = ThinResult<Self::Term<'data>>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Array>

Allows encoding an iterator over RDF terms in an Arrow array.

fn encode_term( term: ThinResult<Self::Term<'_>>, ) -> DFResult<<PlainTermEncoding as TermEncoding>::Scalar>

Allows encoding a scalar RDF term in an Arrow scalar.

impl TermEncoding for PlainTermEncoding

type Array = PlainTermArray

Represents a wrapper for Arrow arrays of this encoding. This can be used in conjunction with TermDecoder to obtain the values from an Arrow array.

type Scalar = PlainTermScalar

Represents a wrapper for Arrow scalars of this encoding. This can be used in conjunction with TermDecoder to obtain the values from an Arrow scalar.

fn name(&self) -> EncodingName

Returns the name of the encoding.

fn data_type(&self) -> DataType

Returns the DataType that is used for this encoding.

fn try_new_array(&self, array: ArrayRef) -> DFResult<Self::Array>

Checks whether array contains a value with the correct encoding (i.e., type and possibly metadata checks). If yes, returns an instance of Self::Array. Otherwise, an error is returned.

fn try_new_scalar(&self, scalar: ScalarValue) -> DFResult<Self::Scalar>

Checks whether scalar contains a value with the correct encoding (i.e., type and possibly metadata checks). If yes, returns an instance of Self::Scalar. Otherwise, an error is returned.

fn try_new_datum( &self, value: ColumnarValue, number_rows: usize, ) -> DFResult<EncodingDatum<Self>>

Checks whether value contains a value with the correct encoding (i.e., type and possibly metadata checks). If yes, returns a datum that either wraps an array or a scalar. Otherwise, an error is returned.