org.apache.beam.sdk.io.gcp.datastore

Class RowToEntity

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<Row>,PCollection<Entity>>

org.apache.beam.sdk.io.gcp.datastore.RowToEntity

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

public class RowToEntity
extends PTransform<PCollection<Row>,PCollection<Entity>>

A PTransform to perform a conversion of Row to Entity.

See Also:

Serialized Form

Field Summary

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

name, resourceHints

Method Summary

Modifier and Type	Method and Description
static RowToEntity	create(java.lang.String keyField, java.lang.String kind) Create a PTransform instance.
static RowToEntity	createTest(java.lang.String keyString, java.lang.String keyField, java.lang.String kind)
PCollection<Entity>	expand(PCollection<Row> input) Override this method to specify how this PTransform should be expanded on the given InputT.

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

compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setResourceHints, toString, validate

Methods inherited from class java.lang.Object

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

Method Detail

expand

public PCollection<Entity> expand(PCollection<Row> 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<PCollection<Row>,PCollection<Entity>>

create

public static RowToEntity create(java.lang.String keyField,
                                 java.lang.String kind)

Create a PTransform instance.

Parameters:

keyField - Row field containing a serialized Key, must be set when using user specified keys.

kind - DataStore `Kind` data will be written to (required when generating random Keys).

Returns:

PTransform instance for Row to Entity conversion.

createTest

public static RowToEntity createTest(java.lang.String keyString,
                                     java.lang.String keyField,
                                     java.lang.String kind)