org.apache.beam.sdk.io

Class TFRecordIO.Read

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PBegin,PCollection<byte[]>>

org.apache.beam.sdk.io.TFRecordIO.Read

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

TFRecordIO

public abstract static class TFRecordIO.Read
extends PTransform<PBegin,PCollection<byte[]>>

Implementation of TFRecordIO.read().

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

name

Constructor Summary

Constructors

Constructor and Description
Read()

Method Summary

Modifier and Type	Method and Description
PCollection<byte[]>	expand(PBegin input) Override this method to specify how this PTransform should be expanded on the given InputT.
TFRecordIO.Read	from(java.lang.String filepattern) Returns a transform for reading TFRecord files that reads from the file(s) with the given filename or filename pattern.
TFRecordIO.Read	from(ValueProvider<java.lang.String> filepattern) Same as from(filepattern), but accepting a ValueProvider.
protected Coder<byte[]>	getDefaultOutputCoder() Returns the default Coder to use for the output of this single-output PTransform.
protected FileBasedSource<byte[]>	getSource()
void	populateDisplayData(DisplayData.Builder builder) Register display data for the given transform or component.
TFRecordIO.Read	withCompressionType(TFRecordIO.CompressionType compressionType) Returns a transform for reading TFRecord files that decompresses all input files using the specified compression type.
TFRecordIO.Read	withoutValidation() Returns a transform for reading TFRecord files that has GCS path validation on pipeline creation disabled.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, toString, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Read

public Read()

Method Detail

from

public TFRecordIO.Read from(java.lang.String filepattern)

Returns a transform for reading TFRecord files that reads from the file(s) with the given filename or filename pattern. This can be a local path (if running locally), or a Google Cloud Storage filename or filename pattern of the form "gs://<bucket>/<filepath>" (if running locally or using remote execution). Standard Java Filesystem glob patterns ("*", "?", "[..]") are supported.

from

public TFRecordIO.Read from(ValueProvider<java.lang.String> filepattern)

Same as from(filepattern), but accepting a ValueProvider.

withoutValidation

public TFRecordIO.Read withoutValidation()

Returns a transform for reading TFRecord files that has GCS path validation on pipeline creation disabled.

This can be useful in the case where the GCS input does not exist at the pipeline creation time, but is expected to be available at execution time.

withCompressionType

public TFRecordIO.Read withCompressionType(TFRecordIO.CompressionType compressionType)

Returns a transform for reading TFRecord files that decompresses all input files using the specified compression type.

If no compression type is specified, the default is TFRecordIO.CompressionType.AUTO. In this mode, the compression type of the file is determined by its extension (e.g., *.gz is gzipped, *.zlib is zlib compressed, and all other extensions are uncompressed).

expand

public PCollection<byte[]> expand(PBegin input)

Description copied from class: PTransform

Override this method to specify how this PTransform should be expanded on the given InputT.

NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.

Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

Specified by:

expand in class PTransform<PBegin,PCollection<byte[]>>

getSource

protected FileBasedSource<byte[]> getSource()

populateDisplayData

public void populateDisplayData(DisplayData.Builder builder)

Description copied from class: PTransform

Register display data for the given transform or component.

populateDisplayData(DisplayData.Builder) is invoked by Pipeline runners to collect display data via DisplayData.from(HasDisplayData). Implementations may call super.populateDisplayData(builder) in order to register display data in the current namespace, but should otherwise use subcomponent.populateDisplayData(builder) to use the namespace of the subcomponent.

By default, does not register any display data. Implementors may override this method to provide their own display data.

Specified by:

populateDisplayData in interface HasDisplayData

Overrides:

populateDisplayData in class PTransform<PBegin,PCollection<byte[]>>

Parameters:

builder - The builder to populate with display data.

See Also:

HasDisplayData

getDefaultOutputCoder

protected Coder<byte[]> getDefaultOutputCoder()

Description copied from class: PTransform

Returns the default Coder to use for the output of this single-output PTransform.

By default, always throws

Overrides:

getDefaultOutputCoder in class PTransform<PBegin,PCollection<byte[]>>