Package org.apache.commons.collections4.functors

Class TransformedPredicate<T>

java.lang.Object
org.apache.commons.collections4.functors.TransformedPredicate<T>
All Implemented Interfaces:
Serializable, PredicateDecorator<T>, Predicate<T>
public final class TransformedPredicate<T> extends Object implements PredicateDecorator<T>, Serializable
Predicate implementation that transforms the given object before invoking another Predicate.
Since:
3.1
See Also:

  • Constructor Details

    • TransformedPredicate

      public TransformedPredicate(Transformer<? super T,? extends T> transformer, Predicate<? super T> predicate)
      Constructor that performs no validation. Use transformedPredicate if you want that.
      Parameters:
      transformer - the transformer to use
      predicate - the predicate to decorate

  • Method Details

    • transformedPredicate

      public static <T> Predicate<T> transformedPredicate(Transformer<? super T,? extends T> transformer, Predicate<? super T> predicate)
      Factory to create the predicate.
      Type Parameters:
      T - the type that the predicate queries
      Parameters:
      transformer - the transformer to call
      predicate - the predicate to call with the result of the transform
      Returns:
      the predicate
      Throws:
      NullPointerException - if the transformer or the predicate is null

    • evaluate

      public boolean evaluate(T object)
      Evaluates the predicate returning the result of the decorated predicate once the input has been transformed
      Specified by:
      evaluate in interface Predicate<T>
      Parameters:
      object - the input object which will be transformed
      Returns:
      true if decorated predicate returns true

    • getPredicates

      public Predicate<? super T>[] getPredicates()
      Gets the predicate being decorated.
      Specified by:
      getPredicates in interface PredicateDecorator<T>
      Returns:
      the predicate as the only element in an array
      Since:
      3.1

    • getTransformer

      public Transformer<? super T,? extends T> getTransformer()
      Gets the transformer in use.
      Returns:
      the transformer