graphar::AdjListArrowChunkReader Class Reference

The arrow chunk reader for adj list topology chunk. More...

#include <chunk_reader.h>

Public Types
using	range_t = std::pair< IdType, IdType >

Public Member Functions
	AdjListArrowChunkReader (const std::shared_ptr< EdgeInfo > &edge_info, AdjListType adj_list_type, const std::string &prefix)
	Initialize the AdjListArrowChunkReader. More...
	AdjListArrowChunkReader (const AdjListArrowChunkReader &other)
	Copy constructor.
Status	seek_src (IdType id)
	Sets chunk position indicator for reader by source vertex id. More...
Status	seek_dst (IdType offset)
	Sets chunk position indicator for reader by destination vertex id. More...
Status	seek (IdType offset)
	Sets chunk position indicator for reader by edge index. More...
Result< std::shared_ptr< arrow::Table > >	GetChunk ()
	Return the current chunk of chunk position indicator as arrow::Table, if the chunk is empty, return nullptr.
Result< IdType >	GetRowNumOfChunk ()
	Get the number of rows of the current chunk table.
Status	next_chunk ()
	Sets chunk position indicator to next chunk. More...
Status	seek_chunk_index (IdType vertex_chunk_index, IdType chunk_index=0)
	Sets chunk position to the specific vertex chunk and edge chunk. More...

Static Public Member Functions
static Result< std::shared_ptr< AdjListArrowChunkReader > >	Make (const std::shared_ptr< EdgeInfo > &edge_info, AdjListType adj_list_type, const std::string &prefix)
	Create an AdjListArrowChunkReader instance from edge info. More...
static Result< std::shared_ptr< AdjListArrowChunkReader > >	Make (const std::shared_ptr< GraphInfo > &graph_info, const std::string &src_label, const std::string &edge_label, const std::string &dst_label, AdjListType adj_list_type)
	Create an AdjListArrowChunkReader instance from graph info. More...

Detailed Description

The arrow chunk reader for adj list topology chunk.

Definition at line 158 of file chunk_reader.h.

Constructor & Destructor Documentation

AdjListArrowChunkReader()

graphar::AdjListArrowChunkReader::AdjListArrowChunkReader	(	const std::shared_ptr< EdgeInfo > &	edge_info,
		AdjListType	adj_list_type,
		const std::string &	prefix
	)

Initialize the AdjListArrowChunkReader.

Parameters

edge_info	The edge info that describes the edge type.
adj_list_type	The adj list type for the edge.
prefix	The absolute prefix.

Definition at line 250 of file chunk_reader.cc.

Member Function Documentation

Make() [1/2]

Result< std::shared_ptr< AdjListArrowChunkReader > > graphar::AdjListArrowChunkReader::Make ( const std::shared_ptr< EdgeInfo > &  edge_info, AdjListType  adj_list_type, const std::string &  prefix  )

static

Create an AdjListArrowChunkReader instance from edge info.

Parameters

edge_info	The edge info.
adj_list_type	The adj list type for the edges.
prefix	The absolute prefix of the graph.

Definition at line 437 of file chunk_reader.cc.

Make() [2/2]

Result< std::shared_ptr< AdjListArrowChunkReader > > graphar::AdjListArrowChunkReader::Make ( const std::shared_ptr< GraphInfo > &  graph_info, const std::string &  src_label, const std::string &  edge_label, const std::string &  dst_label, AdjListType  adj_list_type  )

static

Create an AdjListArrowChunkReader instance from graph info.

Parameters

graph_info	The graph info.
src_label	The source vertex label.
edge_label	The edge label.
dst_label	The destination vertex label.
adj_list_type	The adj list type for the edges.

Definition at line 449 of file chunk_reader.cc.

next_chunk()

Status graphar::AdjListArrowChunkReader::next_chunk

(

)

Sets chunk position indicator to next chunk.

Returns

Status: ok or EndOfChunk error if the reader is at the end of current vertex chunk, or IndexError error if the reader is at the end of all vertex chunks.

Definition at line 389 of file chunk_reader.cc.

seek()

Status graphar::AdjListArrowChunkReader::seek

(

IdType

offset

)

Sets chunk position indicator for reader by edge index.

Parameters

offset

edge index of the vertex chunk. Note: the offset is the edge index of the vertex chunk, not the edge index of the whole graph.

Definition at line 349 of file chunk_reader.cc.

seek_chunk_index()

Status graphar::AdjListArrowChunkReader::seek_chunk_index	(	IdType	vertex_chunk_index,
		IdType	chunk_index = 0
	)

Sets chunk position to the specific vertex chunk and edge chunk.

Parameters

vertex_chunk_index	the vertex chunk index.
chunk_index	the edge chunk index of vertex_chunk_index.

Returns

Status: ok or error

Definition at line 410 of file chunk_reader.cc.

seek_dst()

Status graphar::AdjListArrowChunkReader::seek_dst

(

IdType

offset

)

Sets chunk position indicator for reader by destination vertex id.

Parameters

id	the destination vertex id.

Definition at line 317 of file chunk_reader.cc.

seek_src()

Status graphar::AdjListArrowChunkReader::seek_src

(

IdType

id

)

Sets chunk position indicator for reader by source vertex id.

Parameters

id	the source vertex id.

Definition at line 284 of file chunk_reader.cc.

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

• src/graphar/arrow/chunk_reader.h
• src/graphar/arrow/chunk_reader.cc