Package org.apache.beam.sdk.extensions.ml

Class CloudVision.AnnotateImagesFromBytes

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<ByteString>,PCollection<List<com.google.cloud.vision.v1.AnnotateImageResponse>>>

org.apache.beam.sdk.extensions.ml.CloudVision.AnnotateImagesFromBytes

All Implemented Interfaces:

Serializable, HasDisplayData

Enclosing class:

CloudVision

public static class CloudVision.AnnotateImagesFromBytes
extends PTransform<PCollection<ByteString>,PCollection<List<com.google.cloud.vision.v1.AnnotateImageResponse>>>

Accepts ByteString (encoded image contents) with optional DoFn.SideInput with a Map of ImageContext to the image.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected final PCollectionView<Map<ByteString,com.google.cloud.vision.v1.ImageContext>>	contextSideInput
protected final int	desiredRequestParallelism
protected final List<com.google.cloud.vision.v1.Feature>	featureList

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

annotations, displayData, name, resourceHints

Constructor Summary

Constructors

Constructor	Description
AnnotateImagesFromBytes(PCollectionView<Map<ByteString,com.google.cloud.vision.v1.ImageContext>> contextSideInput, List<com.google.cloud.vision.v1.Feature> featureList, long batchSize, int desiredRequestParallelism)

Method Summary

Modifier and Type	Method	Description
PCollection<List<com.google.cloud.vision.v1.AnnotateImageResponse>>	expand(PCollection<ByteString> input)	Applies all necessary transforms to call the Vision API.
com.google.cloud.vision.v1.AnnotateImageRequest	mapToRequest(ByteString input, @Nullable com.google.cloud.vision.v1.ImageContext ctx)	Maps the ByteString with encoded image data and the optional ImageContext into an AnnotateImageRequest.

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

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Field Details

contextSideInput

protected final PCollectionView<Map<ByteString,com.google.cloud.vision.v1.ImageContext>> contextSideInput

featureList

protected final List<com.google.cloud.vision.v1.Feature> featureList

desiredRequestParallelism

protected final int desiredRequestParallelism

Constructor Details

AnnotateImagesFromBytes

public AnnotateImagesFromBytes(PCollectionView<Map<ByteString,com.google.cloud.vision.v1.ImageContext>> contextSideInput,
 List<com.google.cloud.vision.v1.Feature> featureList,
 long batchSize,
 int desiredRequestParallelism)

Method Details

mapToRequest

public com.google.cloud.vision.v1.AnnotateImageRequest mapToRequest(ByteString input,
 @Nullable com.google.cloud.vision.v1.ImageContext ctx)

Maps the ByteString with encoded image data and the optional ImageContext into an AnnotateImageRequest.

Parameters:

input - Input element.

ctx - optional image context.

Returns:

a valid request.

expand

public PCollection<List<com.google.cloud.vision.v1.AnnotateImageResponse>> expand(PCollection<ByteString> input)

Applies all necessary transforms to call the Vision API. In order to group requests into batches, we assign keys to the requests, as GroupIntoBatches works only on KVs.

Specified by:

expand in class PTransform<PCollection<T>,PCollection<List<com.google.cloud.vision.v1.AnnotateImageResponse>>>