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StringEncoding

rdf_fusion::encoding::string

Struct StringEncoding 

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pub struct StringEncoding;

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impl StringEncoding

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pub fn data_type() -> DataType

Returns the type of the StringEncoding.

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pub fn encode_term( &self, term: Result<TermRef<'_>, ThinError>, ) -> Result<StringEncodingScalar, DataFusionError>

Encodes the term as a StringEncodingScalar.

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impl Debug for StringEncoding

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

Formats the value using the given formatter. Read more
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impl TermEncoder<StringEncoding> for StringEncoding

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

The value type that is being encoded.
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fn encode_terms<'data>( &self, terms: impl IntoIterator<Item = Result<<StringEncoding as TermEncoder<StringEncoding>>::Term<'data>, ThinError>>, ) -> Result<StringTermArray, DataFusionError>

Allows encoding an iterator over RDF terms in an Arrow array.
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fn encode_term( &self, term: Result<<StringEncoding as TermEncoder<StringEncoding>>::Term<'_>, ThinError>, ) -> Result<StringEncodingScalar, DataFusionError>

Allows encoding a scalar RDF term in an Arrow scalar.
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impl TermEncoding for StringEncoding

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type Array = StringTermArray

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.
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type Scalar = StringEncodingScalar

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.
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fn name(&self) -> EncodingName

Returns the name of the encoding.
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fn data_type(&self) -> &DataType

Returns the DataType that is used for this encoding. Read more
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fn try_new_array( self: &Arc<StringEncoding>, array: Arc<dyn Array>, ) -> Result<<StringEncoding as TermEncoding>::Array, DataFusionError>

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.
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fn try_new_scalar( self: &Arc<StringEncoding>, scalar: ScalarValue, ) -> Result<<StringEncoding as TermEncoding>::Scalar, DataFusionError>

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.
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fn try_new_datum( self: &Arc<Self>, value: ColumnarValue, number_rows: usize, ) -> Result<EncodingDatum<Self>, DataFusionError>

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.

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