public abstract static class CosmosIO.Read<T> extends PTransform<PBegin,PCollection<T>>
annotations, displayData, name, resourceHints
Constructor and Description |
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Read() |
Modifier and Type | Method and Description |
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PCollection<T> |
expand(PBegin input)
Override this method to specify how this
PTransform should be expanded on the given
InputT . |
CosmosIO.Read<T> |
withCoder(Coder<T> coder)
Specify the
Coder used to serialize the document in the PCollection . |
CosmosIO.Read<T> |
withContainer(java.lang.String container)
Specify the Cosmos container to read from.
|
CosmosIO.Read<T> |
withDatabase(java.lang.String database)
Specify the Cosmos database to read from.
|
CosmosIO.Read<T> |
withQuery(java.lang.String query)
Specify the query to read data.
|
addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate
public CosmosIO.Read<T> withDatabase(java.lang.String database)
public CosmosIO.Read<T> withContainer(java.lang.String container)
public CosmosIO.Read<T> withQuery(java.lang.String query)
public CosmosIO.Read<T> withCoder(Coder<T> coder)
Coder
used to serialize the document in the PCollection
.public PCollection<T> expand(PBegin 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<PBegin,PCollection<T>>