Avro.Generic.PreresolvingDatumReader< T > Class Template Reference

A general purpose reader of data from avro streams. This reader analyzes and resolves the reader and writer schemas when constructed so that reads can be more efficient. Once constructed, a reader can be reused or shared among threads to avoid incurring more resolution costs. More...

Inheritance diagram for Avro.Generic.PreresolvingDatumReader< T >:

List of all members.

Classes
interface	ArrayAccess
interface	EnumAccess
interface	FixedAccess
interface	MapAccess
interface	RecordAccess
class	SchemaPair
Public Member Functions
T	Read (T reuse, Decoder decoder)
	Read a datum. Traverse the schema, depth-first, reading all leaf values in the schema into a datum that is returned. If the provided datum is non-null it may be reused and returned.
Protected Member Functions
delegate object	ReadItem (object reuse, Decoder dec)
	PreresolvingDatumReader (Schema writerSchema, Schema readerSchema)
abstract ArrayAccess	GetArrayAccess (ArraySchema readerSchema)
abstract EnumAccess	GetEnumAccess (EnumSchema readerSchema)
abstract MapAccess	GetMapAccess (MapSchema readerSchema)
abstract RecordAccess	GetRecordAccess (RecordSchema readerSchema)
abstract FixedAccess	GetFixedAccess (FixedSchema readerSchema)
virtual bool	IsReusable (Schema.Type tag)
	Indicates if it's possible to reuse an object of the specified type. Generally false for immutable objects like int, long, string, etc but may differ between the Specific and Generic implementations. Used to avoid retrieving the existing value if it's not reusable.
Static Protected Member Functions
static Schema	FindBranch (UnionSchema us, Schema s)
Properties
Schema	ReaderSchema [get, set]
Schema	WriterSchema [get, set]

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Detailed Description

template<T>
class Avro::Generic::PreresolvingDatumReader< T >

A general purpose reader of data from avro streams. This reader analyzes and resolves the reader and writer schemas when constructed so that reads can be more efficient. Once constructed, a reader can be reused or shared among threads to avoid incurring more resolution costs.

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Member Function Documentation

template<T >

virtual bool Avro.Generic.PreresolvingDatumReader< T >.IsReusable

(

Schema.Type

tag

)

[inline, protected, virtual]

Indicates if it's possible to reuse an object of the specified type. Generally false for immutable objects like int, long, string, etc but may differ between the Specific and Generic implementations. Used to avoid retrieving the existing value if it's not reusable.

Reimplemented in Avro.Generic.GenericDatumReader< T >, and Avro.Specific.SpecificDatumReader< T >.

template<T >

T Avro.Generic.PreresolvingDatumReader< T >.Read	(	T	reuse,
		Decoder	decoder
	)		[inline]

Read a datum. Traverse the schema, depth-first, reading all leaf values in the schema into a datum that is returned. If the provided datum is non-null it may be reused and returned.

Implements Avro.Generic.DatumReader< T >.

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The documentation for this class was generated from the following file:

• src/apache/main/Generic/PreresolvingDatumReader.cs