Avro C++
Public Member Functions | List of all members
avro::ResolvingDecoder Class Referenceabstract

ResolvingDecoder is derived from Decoder, with an additional function to obtain the field ordering of fields within a record. More...

#include <Decoder.hh>

Inheritance diagram for avro::ResolvingDecoder:
avro::Decoder

Public Member Functions

virtual const std::vector< size_t > & fieldOrder ()=0
 Returns the order of fields for records. More...
 
- Public Member Functions inherited from avro::Decoder
virtual void init (InputStream &is)=0
 All future decoding will come from is, which should be valid until replaced by another call to init() or this Decoder is destructed.
 
virtual void decodeNull ()=0
 Decodes a null from the current stream.
 
virtual bool decodeBool ()=0
 Decodes a bool from the current stream.
 
virtual int32_t decodeInt ()=0
 Decodes a 32-bit int from the current stream.
 
virtual int64_t decodeLong ()=0
 Decodes a 64-bit signed int from the current stream.
 
virtual float decodeFloat ()=0
 Decodes a single-precision floating point number from current stream.
 
virtual double decodeDouble ()=0
 Decodes a double-precision floating point number from current stream.
 
std::string decodeString ()
 Decodes a UTF-8 string from the current stream.
 
virtual void decodeString (std::string &value)=0
 Decodes a UTF-8 string from the stream and assigns it to value.
 
virtual void skipString ()=0
 Skips a string on the current stream.
 
std::vector< uint8_t > decodeBytes ()
 Decodes arbitrary binary data from the current stream.
 
virtual void decodeBytes (std::vector< uint8_t > &value)=0
 Decodes arbitrary binary data from the current stream and puts it in value.
 
virtual void skipBytes ()=0
 Skips bytes on the current stream.
 
std::vector< uint8_t > decodeFixed (size_t n)
 Decodes fixed length binary from the current stream. More...
 
virtual void decodeFixed (size_t n, std::vector< uint8_t > &value)=0
 Decodes a fixed from the current stream. More...
 
virtual void skipFixed (size_t n)=0
 Skips fixed length binary on the current stream.
 
virtual size_t decodeEnum ()=0
 Decodes enum from the current stream.
 
virtual size_t arrayStart ()=0
 Start decoding an array. Returns the number of entries in first chunk.
 
virtual size_t arrayNext ()=0
 Returns the number of entries in next chunk. 0 if last.
 
virtual size_t skipArray ()=0
 Tries to skip an array. More...
 
virtual size_t mapStart ()=0
 Start decoding a map. Returns the number of entries in first chunk.
 
virtual size_t mapNext ()=0
 Returns the number of entries in next chunk. 0 if last.
 
virtual size_t skipMap ()=0
 Tries to skip a map. More...
 
virtual size_t decodeUnionIndex ()=0
 Decodes a branch of a union. The actual value is to follow.
 
virtual void drain ()=0
 Drains any additional data at the end of the current entry in a stream. More...
 

Detailed Description

ResolvingDecoder is derived from Decoder, with an additional function to obtain the field ordering of fields within a record.

Member Function Documentation

◆ fieldOrder()

virtual const std::vector<size_t>& avro::ResolvingDecoder::fieldOrder ( )
pure virtual

Returns the order of fields for records.

The order of fields could be different from the order of their order in the schema because the writer's field order could be different. In order to avoid buffering and later use, we return the values in the writer's field order.


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