org.bytedeco.parquet

Class RowGroupMetaData

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.parquet.RowGroupMetaData

All Implemented Interfaces:

AutoCloseable

@Namespace(value="parquet")
 @NoOffset
 @Properties(inherit=parquet.class)
public class RowGroupMetaData
extends Pointer

\brief RowGroupMetaData is a proxy around format::RowGroupMetaData.

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
RowGroupMetaData(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
boolean	can_decompress()
ColumnChunkMetaData	ColumnChunk(int index) \brief Return the ColumnChunkMetaData of the corresponding column ordinal.
boolean	Equals(RowGroupMetaData other)
long	file_offset() \brief Byte offset from beginning of file to first page (data or dictionary) in this row group The file_offset field that this method exposes is optional.
static RowGroupMetaData	Make(Pointer metadata, SchemaDescriptor schema)
static RowGroupMetaData	Make(Pointer metadata, SchemaDescriptor schema, ApplicationVersion writer_version, InternalFileDecryptor file_decryptor) \brief Create a RowGroupMetaData from a serialized thrift message.
int	num_columns() \brief The number of columns in this row group.
long	num_rows() \brief Number of rows in this row group.
SchemaDescriptor	schema()
long	total_byte_size() \brief Total byte size of all the uncompressed column data in this row group.
long	total_compressed_size() \brief Total byte size of all the compressed (and potentially encrypted) column data in this row group.

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, getDirectBufferAddress, getPointer, getPointer, getPointer, getPointer, hashCode, interruptDeallocatorThread, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetAddress, offsetof, offsetof, parseBytes, physicalBytes, physicalBytesInaccurate, 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

RowGroupMetaData

public RowGroupMetaData(Pointer p)

Pointer cast constructor. Invokes Pointer(Pointer).

Method Detail

Make

@UniquePtr
public static RowGroupMetaData Make(@Const
                                                Pointer metadata,
                                                @Const
                                                SchemaDescriptor schema,
                                                @Const
                                                ApplicationVersion writer_version,
                                                @SharedPtr
                                                InternalFileDecryptor file_decryptor)

\brief Create a RowGroupMetaData from a serialized thrift message.

Make

@UniquePtr
public static RowGroupMetaData Make(@Const
                                                Pointer metadata,
                                                @Const
                                                SchemaDescriptor schema)

Equals

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

num_columns

public int num_columns()

\brief The number of columns in this row group. The order must match the parent's column ordering.

ColumnChunk

@UniquePtr
public ColumnChunkMetaData ColumnChunk(int index)

\brief Return the ColumnChunkMetaData of the corresponding column ordinal. WARNING, the returned object references memory location in it's parent (RowGroupMetaData) object. Hence, the parent must outlive the returned object.

Parameters:

index - [in] of the ColumnChunkMetaData to retrieve.

Throws:

ParquetException - if the index is out of bound.

num_rows

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

\brief Number of rows in this row group.

total_byte_size

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

\brief Total byte size of all the uncompressed column data in this row group.

total_compressed_size

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

\brief Total byte size of all the compressed (and potentially encrypted) column data in this row group. This information is optional and may be 0 if omitted.

file_offset

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

\brief Byte offset from beginning of file to first page (data or dictionary) in this row group The file_offset field that this method exposes is optional. This method will return 0 if that field is not set to a meaningful value.

schema

@Const
public SchemaDescriptor schema()

can_decompress

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