org.bytedeco.parquet

Class ParquetFileWriter

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.parquet.ParquetFileWriter

All Implemented Interfaces:

AutoCloseable

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ParquetFileWriter.Contents

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
ParquetFileWriter()
ParquetFileWriter(long size) Native array allocator.
ParquetFileWriter(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
RowGroupWriter	AppendBufferedRowGroup() Construct a RowGroupWriter that buffers all the values until the RowGroup is ready.
RowGroupWriter	AppendRowGroup() Construct a RowGroupWriter with an arbitrary number of rows.
RowGroupWriter	AppendRowGroup(long num_rows)
void	Close()
ColumnDescriptor	descr(int i) Returns a column descriptor in schema
KeyValueMetadata	key_value_metadata() Returns the file custom metadata
FileMetaData	metadata() Returns the file metadata, only available after calling Close().
int	num_columns() Number of columns.
int	num_row_groups() Number of started RowGroups.
long	num_rows() Number of rows in the yet started RowGroups.
static ParquetFileWriter	Open(OutputStream sink, GroupNode schema)
static ParquetFileWriter	Open(OutputStream sink, GroupNode schema, WriterProperties properties, KeyValueMetadata key_value_metadata)
void	Open(ParquetFileWriter.Contents contents)
ParquetFileWriter	position(long position)
WriterProperties	properties() Configuration passed to the writer, e.g.
SchemaDescriptor	schema() Returns the file schema descriptor

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, 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

ParquetFileWriter

public ParquetFileWriter(Pointer p)

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

ParquetFileWriter

public ParquetFileWriter(long size)

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

ParquetFileWriter

public ParquetFileWriter()

Method Detail

position

public ParquetFileWriter position(long position)

Overrides:

position in class Pointer

Open

@UniquePtr
public static ParquetFileWriter Open(@SharedPtr
                                                OutputStream sink,
                                                @SharedPtr
                                                GroupNode schema,
                                                @SharedPtr
                                                WriterProperties properties,
                                                @Const @SharedPtr
                                                KeyValueMetadata key_value_metadata)

Open

@UniquePtr
public static ParquetFileWriter Open(@SharedPtr
                                                OutputStream sink,
                                                @SharedPtr
                                                GroupNode schema)

Open

public void Open(@UniquePtr
                 ParquetFileWriter.Contents contents)

Close

public void Close()

AppendRowGroup

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

AppendRowGroup

public RowGroupWriter AppendRowGroup()

Construct a RowGroupWriter with an arbitrary number of rows. Ownership is solely within the ParquetFileWriter. The RowGroupWriter is only valid until the next call to AppendRowGroup or AppendBufferedRowGroup or Close.

AppendBufferedRowGroup

public RowGroupWriter AppendBufferedRowGroup()

Construct a RowGroupWriter that buffers all the values until the RowGroup is ready. Use this if you want to write a RowGroup based on a certain size Ownership is solely within the ParquetFileWriter. The RowGroupWriter is only valid until the next call to AppendRowGroup or AppendBufferedRowGroup or Close.

num_columns

public int num_columns()

Number of columns. This number is fixed during the lifetime of the writer as it is determined via the schema.

num_rows

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

Number of rows in the yet started RowGroups. Changes on the addition of a new RowGroup.

num_row_groups

public int num_row_groups()

Number of started RowGroups.

properties

@SharedPtr
public WriterProperties properties()

Configuration passed to the writer, e.g. the used Parquet format version.

schema

@Const
public SchemaDescriptor schema()

Returns the file schema descriptor

descr

@Const
public ColumnDescriptor descr(int i)

Returns a column descriptor in schema

key_value_metadata

@Const
 @SharedPtr
public KeyValueMetadata key_value_metadata()

Returns the file custom metadata

metadata

@SharedPtr
public FileMetaData metadata()

Returns the file metadata, only available after calling Close().