Package io.deephaven.parquet.base

Enum Class NullParquetMetadataFileWriter

java.lang.Object

java.lang.Enum<NullParquetMetadataFileWriter>

io.deephaven.parquet.base.NullParquetMetadataFileWriter

All Implemented Interfaces:

ParquetMetadataFileWriter, Serializable, Comparable<NullParquetMetadataFileWriter>, java.lang.constant.Constable

public enum NullParquetMetadataFileWriter
extends Enum<NullParquetMetadataFileWriter>
implements ParquetMetadataFileWriter

A no-op implementation of MetadataFileWriterBase when we don't want to write metadata files for Parquet files.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
INSTANCE

Method Summary

Modifier and Type	Method	Description
void	addParquetFileMetadata(URI parquetFileURI, org.apache.parquet.hadoop.metadata.ParquetMetadata metadata)	Add the parquet metadata for the provided parquet file to the list of metadata to be written to combined metadata files.
static NullParquetMetadataFileWriter	valueOf(String name)	Returns the enum constant of this class with the specified name.
static NullParquetMetadataFileWriter[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.
void	writeMetadataFiles(CompletableOutputStream metadataOutputStream, CompletableOutputStream commonMetadataOutputStream)	Write the combined metadata to the provided streams and clear the metadata accumulated so far.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

INSTANCE

public static final NullParquetMetadataFileWriter INSTANCE

Method Details

values

public static NullParquetMetadataFileWriter[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static NullParquetMetadataFileWriter valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

addParquetFileMetadata

public void addParquetFileMetadata(URI parquetFileURI,
 org.apache.parquet.hadoop.metadata.ParquetMetadata metadata)

Description copied from interface: ParquetMetadataFileWriter

Add the parquet metadata for the provided parquet file to the list of metadata to be written to combined metadata files.

Specified by:

addParquetFileMetadata in interface ParquetMetadataFileWriter

Parameters:

parquetFileURI - The parquet file destination URI

metadata - The parquet metadata corresponding to the parquet file

writeMetadataFiles

public void writeMetadataFiles(CompletableOutputStream metadataOutputStream,
 CompletableOutputStream commonMetadataOutputStream)

Description copied from interface: ParquetMetadataFileWriter

Write the combined metadata to the provided streams and clear the metadata accumulated so far. The output streams should be marked as CompletableOutputStream.done() after writing is finished.

Specified by:

writeMetadataFiles in interface ParquetMetadataFileWriter

Parameters:

metadataOutputStream - The output stream for the "_metadata" file

commonMetadataOutputStream - The output stream for the "_common_metadata" file