public class BigtableRowToBeamRow extends PTransform<PCollection<com.google.bigtable.v2.Row>,PCollection<Row>> implements java.io.Serializable
Bigtable Row
is mapped to Beam Row
in the following
way:
row: key, columnFamily[] -> BEAM_ROW
columnFamily: familyName, column[] -> FAMILY
column: columnQualifier, cell[] -> most recent cell or ARRAY
cell: value, timestampMicros, labels -> VALUE
Mapped Beam Row
:
BEAM_ROW: ROW
FAMILY: ROW<[columnName ARRAY
VALUE:ROW_CELL or Schema
type except for: ARRAY, DECIMAL, ITERABLE, MAP, ROW
ROW_CELL: ROW
Note: ARRAY
annotations, displayData, name, resourceHints
Constructor and Description |
---|
BigtableRowToBeamRow(Schema schema) |
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 . |
addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate
public BigtableRowToBeamRow(Schema schema)
public PCollection<Row> expand(PCollection<com.google.bigtable.v2.Row> input)
PTransform
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).
expand
in class PTransform<PCollection<com.google.bigtable.v2.Row>,PCollection<Row>>