Package org.apache.commons.collections4.functors

Class FactoryTransformer<T,R>

java.lang.Object

org.apache.commons.collections4.functors.FactoryTransformer<T,R>

Type Parameters:

T - the type of the input to the function.

R - the type of the result of the function.

All Implemented Interfaces:

Serializable, Function<T,R>, Transformer<T,R>

public class FactoryTransformer<T,R>
extends Object
implements Transformer<T,R>, Serializable

Transformer implementation that calls a Factory and returns the result.

Since:

3.0

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
FactoryTransformer(Factory<? extends R> factory)	Constructor that performs no validation.

Method Summary

Modifier and Type	Method	Description
static <I, O> Transformer<I,O>	factoryTransformer(Factory<? extends O> factory)	Factory method that performs validation.
Factory<? extends R>	getFactory()	Gets the factory.
R	transform(T input)	Transforms the input by ignoring the input and returning the result of calling the decorated factory.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Function

andThen, compose

Methods inherited from interface org.apache.commons.collections4.Transformer

apply

Constructor Details

FactoryTransformer

public FactoryTransformer(Factory<? extends R> factory)

Constructor that performs no validation. Use factoryTransformer if you want that.

Parameters:

factory - the factory to call, not null

Method Details

factoryTransformer

public static <I,
O> Transformer<I,O> factoryTransformer(Factory<? extends O> factory)

Factory method that performs validation.

Type Parameters:

I - the input type

O - the output type

Parameters:

factory - the factory to call, not null

Returns:

the factory transformer

Throws:

NullPointerException - if the factory is null

getFactory

public Factory<? extends R> getFactory()

Gets the factory.

Returns:

the factory

Since:

3.1

transform

public R transform(T input)

Transforms the input by ignoring the input and returning the result of calling the decorated factory.

Specified by:

transform in interface Transformer<T,R>

Parameters:

input - the input object to transform

Returns:

the transformed result