Class LogicalReadConverterFactory

Namespace

ParquetSharp

Assembly

ParquetSharp.dll

Extendable class that handles the mapping between a Parquet physical type and the C# logical type when reading values.

public class LogicalReadConverterFactory

Inheritance

object

LogicalReadConverterFactory

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Fields

Default

public static readonly LogicalReadConverterFactory Default

Field Value

LogicalReadConverterFactory

Methods

GetConverter<TLogical, TPhysical>(ColumnDescriptor, ColumnChunkMetaData)

Return a converter delegate that converts a TPhysical readonly-span to a TLogical span.

public virtual Delegate GetConverter<TLogical, TPhysical>(ColumnDescriptor columnDescriptor, ColumnChunkMetaData columnChunkMetaData) where TPhysical : unmanaged

Parameters

columnDescriptor ColumnDescriptor

The descriptor of the column to be converted.

columnChunkMetaData ColumnChunkMetaData

The metadata of the column-chunk to be converted.

Returns

Delegate

A delegate of type LogicalRead<TLogical, TPhysical>.Converter

Type Parameters

TLogical

TPhysical

GetDirectReader<TLogical, TPhysical>()

Return a reader delegate if a TPhysical column reader can directly write into a TLogical span (e.g. float to float, int to uint, etc). Otherwise return null. This is an optimisation to avoid needless memory copies between buffers (i.e. otherwise we have to use the identity converter).

public virtual Delegate? GetDirectReader<TLogical, TPhysical>() where TPhysical : unmanaged

Returns

Delegate

A delegate of type LogicalRead<TLogical, TPhysical>.DirectReader

Type Parameters

TLogical

TPhysical