org.bytedeco.arrow

Class MetaFunction

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.arrow.Function

org.bytedeco.arrow.MetaFunction

All Implemented Interfaces:

AutoCloseable

@Namespace(value="arrow::compute")
 @Properties(inherit=arrow.class)
public class MetaFunction
extends Function

\brief A function that dispatches to other functions. Must implement MetaFunction::ExecuteImpl. For Array, ChunkedArray, and Scalar Datum kinds, may rely on the execution of concrete Function types, but must handle other Datum kinds on its own.

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.arrow.Function

Function.Kind

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
MetaFunction(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
KernelResult	DispatchExact(ValueDescrVector arg0) \brief Return a kernel that can execute the function given the exact argument types (without implicit type casts or scalar->array promotions).
DatumResult	Execute(DatumVector args, FunctionOptions options, ExecContext ctx) \brief Execute the function eagerly with the passed input arguments with kernel dispatch, batch iteration, and memory allocation details taken care of.
int	num_kernels() \brief Returns the number of registered kernels for this function.

Methods inherited from class org.bytedeco.arrow.Function

arity, default_options, doc, kind, name, Validate

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, getPointer, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, offsetof, parseBytes, physicalBytes, position, 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

MetaFunction

public MetaFunction(Pointer p)

Pointer cast constructor. Invokes Pointer(Pointer).

Method Detail

num_kernels

public int num_kernels()

Description copied from class: Function

\brief Returns the number of registered kernels for this function.

Overrides:

num_kernels in class Function

Execute

@ByVal
public DatumResult Execute(@Const @ByRef
                                   DatumVector args,
                                   @Const
                                   FunctionOptions options,
                                   ExecContext ctx)

Description copied from class: Function

\brief Execute the function eagerly with the passed input arguments with kernel dispatch, batch iteration, and memory allocation details taken care of. If the options pointer is null, then default_options() will be used. This function can be overridden in subclasses.

Overrides:

Execute in class Function

DispatchExact

@ByVal
 @Cast(value="arrow::Result<const arrow::compute::Kernel*>*")
public KernelResult DispatchExact(@Const @ByRef
                                                                                                         ValueDescrVector arg0)

Description copied from class: Function

\brief Return a kernel that can execute the function given the exact argument types (without implicit type casts or scalar->array promotions). NB: This function is overridden in CastFunction.

Overrides:

DispatchExact in class Function