org.bytedeco.arrow_dataset

Class Source

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.arrow_dataset.Source

All Implemented Interfaces:

AutoCloseable

Direct Known Subclasses:

FileSystemSource, InMemorySource, TreeSource

@Namespace(value="arrow::dataset")
 @NoOffset
 @Properties(inherit=arrow_dataset.class)
public class Source
extends Pointer

\brief A basic component of a Dataset which yields zero or more Fragments. A Source acts as a discovery mechanism of Fragments and partitions, e.g. files deeply nested in a directory.

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator, Pointer.ReferenceCounter

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
Source(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
ScanTaskIterator	GetFragments(ScanOptions options) \brief GetFragments returns an iterator of Fragments.
Expression	partition_expression() \brief An expression which evaluates to true for all data viewed by this Source.
Schema	schema()
String	type_name() \brief The name identifying the kind of source

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, availablePhysicalBytes, calloc, capacity, capacity, close, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, formatBytes, free, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, parseBytes, physicalBytes, position, position, put, realloc, referenceCount, releaseReference, retainReference, setNull, sizeof, toString, totalBytes, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Source

public Source(Pointer p)

Pointer cast constructor. Invokes Pointer.Pointer(Pointer).

Method Detail

GetFragments

@ByVal
 @Cast(value="arrow::dataset::FragmentIterator*")
public ScanTaskIterator GetFragments(@SharedPtr
                                                                                              ScanOptions options)

\brief GetFragments returns an iterator of Fragments. The ScanOptions controls filtering and schema inference.

schema

@Const
 @SharedPtr
 @ByRef
public Schema schema()

partition_expression

@Const
 @SharedPtr
 @ByRef
public Expression partition_expression()

\brief An expression which evaluates to true for all data viewed by this Source. May be null, which indicates no information is available.

type_name

@StdString
public String type_name()

\brief The name identifying the kind of source