Package org.apache.commons.collections4.functors

Class 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:
    java.io.Serializable, java.util.function.Function<T,​R>, Transformer<T,​R>
    public class FactoryTransformer<T,​R>
extends java.lang.Object
implements Transformer<T,​R>, java.io.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

      All Methods Static Methods Instance Methods Concrete Methods 
      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 Detail

      • 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 Detail

      • 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:
        java.lang.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