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:

  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      Serial version UID
      See Also:

    • iFactory

      private final Factory<? extends R> iFactory
      The factory to wrap

  • 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