org.bytedeco.arrow

Class ScalarAggregateKernel

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.arrow.Kernel

org.bytedeco.arrow.ScalarAggregateKernel

All Implemented Interfaces:

AutoCloseable

@Namespace(value="arrow::compute")
 @NoOffset
 @Properties(inherit=arrow.class)
public class ScalarAggregateKernel
extends Kernel

\brief Kernel data structure for implementations of ScalarAggregateFunction. The four necessary components of an aggregation kernel are the init, consume, merge, and finalize functions. * init: creates a new KernelState for a kernel. * consume: processes an ExecBatch and updates the KernelState found in the KernelContext. * merge: combines one KernelState with another. * finalize: produces the end result of the aggregation using the KernelState in the KernelContext.

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
ScalarAggregateKernel()
ScalarAggregateKernel(InputType in_types, OutputType out_type, Pointer init, Pointer consume, Pointer merge, Pointer _finalize)
ScalarAggregateKernel(KernelSignature sig, Pointer init, Pointer consume, Pointer merge, Pointer _finalize)
ScalarAggregateKernel(long size) Native array allocator.
ScalarAggregateKernel(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
Pointer	_finalize()
ScalarAggregateKernel	_finalize(Pointer setter)
Pointer	consume()
ScalarAggregateKernel	consume(Pointer setter)
ScalarAggregateKernel	getPointer(long i)
Pointer	merge()
ScalarAggregateKernel	merge(Pointer setter)
ScalarAggregateKernel	position(long position)

Methods inherited from class org.bytedeco.arrow.Kernel

init, init, parallelizable, parallelizable, signature, signature, simd_level, simd_level

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, getPointer, getPointer, getPointer, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, offsetof, parseBytes, physicalBytes, position, put, realloc, referenceCount, releaseReference, retainReference, setNull, sizeof, sizeof, toString, totalBytes, totalCount, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

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

Constructor Detail

ScalarAggregateKernel

public ScalarAggregateKernel(Pointer p)

Pointer cast constructor. Invokes Pointer(Pointer).

ScalarAggregateKernel

public ScalarAggregateKernel(long size)

Native array allocator. Access with Pointer.position(long).

ScalarAggregateKernel

public ScalarAggregateKernel()

ScalarAggregateKernel

public ScalarAggregateKernel(@SharedPtr @Cast(value={"","std::shared_ptr<arrow::compute::KernelSignature>"})
                             KernelSignature sig,
                             @ByVal @Cast(value="arrow::compute::KernelInit*")
                             Pointer init,
                             @ByVal @Cast(value="arrow::compute::ScalarAggregateConsume*")
                             Pointer consume,
                             @ByVal @Cast(value="arrow::compute::ScalarAggregateMerge*")
                             Pointer merge,
                             @ByVal @Cast(value="arrow::compute::ScalarAggregateFinalize*")
                             Pointer _finalize)

ScalarAggregateKernel

public ScalarAggregateKernel(@StdVector
                             InputType in_types,
                             @ByVal
                             OutputType out_type,
                             @ByVal @Cast(value="arrow::compute::KernelInit*")
                             Pointer init,
                             @ByVal @Cast(value="arrow::compute::ScalarAggregateConsume*")
                             Pointer consume,
                             @ByVal @Cast(value="arrow::compute::ScalarAggregateMerge*")
                             Pointer merge,
                             @ByVal @Cast(value="arrow::compute::ScalarAggregateFinalize*")
                             Pointer _finalize)

Method Detail

position

public ScalarAggregateKernel position(long position)

Overrides:

position in class Kernel

getPointer

public ScalarAggregateKernel getPointer(long i)

Overrides:

getPointer in class Kernel

consume

@ByRef
 @Cast(value="arrow::compute::ScalarAggregateConsume*")
public Pointer consume()

consume

public ScalarAggregateKernel consume(Pointer setter)

merge

@ByRef
 @Cast(value="arrow::compute::ScalarAggregateMerge*")
public Pointer merge()

merge

public ScalarAggregateKernel merge(Pointer setter)

_finalize

@ByRef
 @Cast(value="arrow::compute::ScalarAggregateFinalize*")
 @Name(value="finalize")
public Pointer _finalize()

_finalize

public ScalarAggregateKernel _finalize(Pointer setter)