org.bytedeco.arrow_dataset

Class RowGroupInfo

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.arrow_dataset.RowGroupInfo

All Implemented Interfaces:

AutoCloseable

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

\brief Represents a parquet's RowGroup with extra information.

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
RowGroupInfo()
RowGroupInfo(int id) \brief Construct a RowGroup from an identifier.
RowGroupInfo(int id, long num_rows, long total_byte_size, StructScalar statistics) \brief Construct a RowGroup from an identifier with statistics.
RowGroupInfo(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
boolean	Equals(RowGroupInfo other) \brief Indicate if the other RowGroup points to the same RowGroup.
static RowGroupInfo	FromCount(int count)
static RowGroupInfo	FromIdentifiers(int[] ids)
static RowGroupInfo	FromIdentifiers(IntBuffer ids)
static RowGroupInfo	FromIdentifiers(IntPointer ids) \brief Transform a vector of identifiers into a vector of RowGroupInfos
boolean	HasStatistics() \brief Indicate if statistics are set.
int	id() \brief Return the RowGroup's identifier (index in the file).
long	num_rows() \brief Return the RowGroup's number of rows.
boolean	Satisfy(Expression predicate) \brief Indicate if the RowGroup's statistics satisfy the predicate.
StructScalar	statistics() \brief Return the RowGroup's statistics as a StructScalar with a field for each column with statistics.
long	total_byte_size() \brief Return the RowGroup's total size in bytes.

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

RowGroupInfo

public RowGroupInfo(Pointer p)

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

RowGroupInfo

public RowGroupInfo()

RowGroupInfo

public RowGroupInfo(int id)

\brief Construct a RowGroup from an identifier.

RowGroupInfo

public RowGroupInfo(int id,
                    @Cast(value="int64_t")
                    long num_rows,
                    @Cast(value="int64_t")
                    long total_byte_size,
                    @SharedPtr
                    StructScalar statistics)

\brief Construct a RowGroup from an identifier with statistics.

Method Detail

FromIdentifiers

@StdVector
public static RowGroupInfo FromIdentifiers(@StdVector
                                                       IntPointer ids)

\brief Transform a vector of identifiers into a vector of RowGroupInfos

FromIdentifiers

@StdVector
public static RowGroupInfo FromIdentifiers(@StdVector
                                                       IntBuffer ids)

FromIdentifiers

@StdVector
public static RowGroupInfo FromIdentifiers(@StdVector
                                                       int[] ids)

FromCount

@StdVector
public static RowGroupInfo FromCount(int count)

id

public int id()

\brief Return the RowGroup's identifier (index in the file).

num_rows

@Cast(value="int64_t")
public long num_rows()

\brief Return the RowGroup's number of rows. If statistics are not provided, return -1.

total_byte_size

@Cast(value="int64_t")
public long total_byte_size()

\brief Return the RowGroup's total size in bytes. If statistics are not provided, return -1.

statistics

@SharedPtr
public StructScalar statistics()

\brief Return the RowGroup's statistics as a StructScalar with a field for each column with statistics. Each field will also be a StructScalar with "min" and "max" fields.

HasStatistics

@Cast(value="bool")
public boolean HasStatistics()

\brief Indicate if statistics are set.

Satisfy

@Cast(value="bool")
public boolean Satisfy(@Const @ByRef
                                            Expression predicate)

\brief Indicate if the RowGroup's statistics satisfy the predicate. This will return true if the RowGroup was not initialized with statistics (rather than silently reading metadata for a complete check).

Equals

@Cast(value="bool")
public boolean Equals(@Const @ByRef
                                           RowGroupInfo other)

\brief Indicate if the other RowGroup points to the same RowGroup.