uk.gov.gchq.gaffer.function.processor

Class Transformer.Builder<R>

java.lang.Object

uk.gov.gchq.gaffer.function.processor.Transformer.Builder<R>

Type Parameters:

R - The type of reference used by tuples.

Enclosing class:

Transformer<R>

public static class Transformer.Builder<R>
extends Object

Implementation of the Builder pattern for Transformer.

Constructor Summary

Constructors

Constructor and Description
Builder() Create a Builder for a new Transformer.
Builder(Transformer<R> transformer) Create a Builder for a Transformer.

Method Summary

Modifier and Type	Method and Description
Transformer<R>	build() Build the Transformer configured by this Builder.
Transformer.Builder<R>	execute(TransformFunction function) Set the TransformFunction to be executed by the current ConsumerProducerFunctionContext.
Transformer.Builder<R>	project(R... projection) Set the projection references for the current ConsumerProducerFunctionContext.
Transformer.Builder<R>	select(R... selection) Set the selection references for the current ConsumerProducerFunctionContext.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Builder

public Builder()

Create a Builder for a new Transformer.

Builder

public Builder(Transformer<R> transformer)

Create a Builder for a Transformer.

Parameters:

transformer - Transformer to be configured.

Method Detail

select

public Transformer.Builder<R> select(R... selection)

Set the selection references for the current ConsumerProducerFunctionContext. If the current context already has a selection set, a new context is created and made current. Returns this Builder for further configuration.

Parameters:

selection - Selection references.

Returns:

This Builder.

execute

public Transformer.Builder<R> execute(TransformFunction function)

Set the TransformFunction to be executed by the current ConsumerProducerFunctionContext. If the current context already has a function set, a new context is created and made current. Returns this Builder for further configuration.

Parameters:

function - TransformFunction to be executed.

Returns:

This Builder.

project

public Transformer.Builder<R> project(R... projection)

Set the projection references for the current ConsumerProducerFunctionContext. If the current context already has a projection set, a new context is created and made current. Returns this Builder for further configuration.

Parameters:

projection - Projection references.

Returns:

This Builder.

build

public Transformer<R> build()

Build the Transformer configured by this Builder.

Returns:

Configured Transformer.