org.apache.beam.sdk.io.gcp.bigtable

Class BigtableRowToBeamRowFlat

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<com.google.bigtable.v2.Row>,PCollection<Row>>

org.apache.beam.sdk.io.gcp.bigtable.BigtableRowToBeamRowFlat

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

public class BigtableRowToBeamRowFlat
extends PTransform<PCollection<com.google.bigtable.v2.Row>,PCollection<Row>>

Bigtable reference: .

Requires a mapping which column family corresponds to which column

Bigtable Row is mapped to Beam Row in the following way:

row: key, columnFamily[] -> BEAM_ROW

columnFamily: familyName, column[] -> not mapped directly

column: columnQualifier, cell[] -> most recent cell

cell: value, timestampMicros, labels -> VALUE

Mapped Beam Row:

BEAM_ROW: ROW

VALUE: Beam Schema type except for ARRAY, DECIMAL, ITERABLE, MAP, ROW

See Also:

Serialized Form

Field Summary

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

annotations, displayData, name, resourceHints

Constructor Summary

Constructors

Constructor and Description
BigtableRowToBeamRowFlat(Schema schema, java.util.Map<java.lang.String,java.util.Set<java.lang.String>> columnsMapping)

Method Summary

Modifier and Type	Method and Description
PCollection<Row>	expand(PCollection<com.google.bigtable.v2.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

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

Constructor Detail

BigtableRowToBeamRowFlat

public BigtableRowToBeamRowFlat(Schema schema,
                                java.util.Map<java.lang.String,java.util.Set<java.lang.String>> columnsMapping)

Method Detail

expand

public PCollection<Row> expand(PCollection<com.google.bigtable.v2.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<com.google.bigtable.v2.Row>,PCollection<Row>>