Module org.apache.commons.collections4
Package org.apache.commons.collections4.functors

Class TransformerPredicate<T>

java.lang.Object
org.apache.commons.collections4.functors.TransformerPredicate<T>
All Implemented Interfaces:
Serializable, Predicate<T>
public final class TransformerPredicate<T> extends Object implements Predicate<T>, Serializable
Predicate implementation that returns the result of a transformer.
Since:
3.0
See Also:

  • Constructor Details

    • TransformerPredicate

      public TransformerPredicate(Transformer<? super T,Boolean> transformer)
      Constructor that performs no validation. Use transformerPredicate if you want that.
      Parameters:
      transformer - the transformer to decorate

  • Method Details

    • transformerPredicate

      public static <T> Predicate<T> transformerPredicate(Transformer<? super T,Boolean> transformer)
      Factory to create the predicate.
      Type Parameters:
      T - the type that the predicate queries
      Parameters:
      transformer - the transformer to decorate
      Returns:
      the predicate
      Throws:
      NullPointerException - if the transformer is null

    • evaluate

      public boolean evaluate(T object)
      Evaluates the predicate returning the result of the decorated transformer.
      Specified by:
      evaluate in interface Predicate<T>
      Parameters:
      object - the input object
      Returns:
      true if decorated transformer returns Boolean.TRUE
      Throws:
      FunctorException - if the transformer returns an invalid type

    • getTransformer

      public Transformer<? super T,Boolean> getTransformer()
      Gets the transformer.
      Returns:
      the transformer
      Since:
      3.1