org.apache.beam.sdk.extensions.jackson

Class ParseJsons<OutputT>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<java.lang.String>,PCollection<OutputT>>

org.apache.beam.sdk.extensions.jackson.ParseJsons<OutputT>

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

public class ParseJsons<OutputT>
extends PTransform<PCollection<java.lang.String>,PCollection<OutputT>>

PTransform for parsing JSON Strings. Parse PCollection of Strings in JSON format into a PCollection of objects represented by those JSON Strings using Jackson.

See Also:

Serialized Form

Field Summary

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

name

Method Summary

Modifier and Type	Method and Description
PCollection<OutputT>	expand(PCollection<java.lang.String> input) Override this method to specify how this PTransform should be expanded on the given InputT.
static <OutputT> ParseJsons<OutputT>	of(java.lang.Class<? extends OutputT> outputClass) Creates a ParseJsons PTransform that will parse JSON Strings into a PCollection<OutputT> using a Jackson ObjectMapper.
ParseJsons<OutputT>	withMapper(ObjectMapper mapper) Use custom Jackson ObjectMapper instead of the default one.

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

getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, populateDisplayData, toString, validate

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <OutputT> ParseJsons<OutputT> of(java.lang.Class<? extends OutputT> outputClass)

Creates a ParseJsons PTransform that will parse JSON Strings into a PCollection<OutputT> using a Jackson ObjectMapper.

withMapper

public ParseJsons<OutputT> withMapper(ObjectMapper mapper)

Use custom Jackson ObjectMapper instead of the default one.

expand

public PCollection<OutputT> expand(PCollection<java.lang.String> 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<java.lang.String>,PCollection<OutputT>>