Package org.apache.commons.collections4.functors

Class PredicateTransformer<T>

java.lang.Object
org.apache.commons.collections4.functors.PredicateTransformer<T>
All Implemented Interfaces:
Serializable, Transformer<T,Boolean>
public class PredicateTransformer<T> extends Object implements Transformer<T,Boolean>, Serializable
Transformer implementation that calls a Predicate using the input object and then returns the result.
Since:
3.0
See Also:

  • Constructor Details

    • PredicateTransformer

      public PredicateTransformer(Predicate<? super T> predicate)
      Constructor that performs no validation. Use predicateTransformer if you want that.
      Parameters:
      predicate - the predicate to call, not null

  • Method Details

    • predicateTransformer

      public static <T> Transformer<T,Boolean> predicateTransformer(Predicate<? super T> predicate)
      Factory method that performs validation.
      Type Parameters:
      T - the input type
      Parameters:
      predicate - the predicate to call, not null
      Returns:
      the predicate transformer
      Throws:
      IllegalArgumentException - if the predicate is null

    • getPredicate

      public Predicate<? super T> getPredicate()
      Gets the predicate.
      Returns:
      the predicate
      Since:
      3.1

    • transform

      public Boolean transform(T input)
      Transforms the input to result by calling a predicate.
      Specified by:
      transform in interface Transformer<T,Boolean>
      Parameters:
      input - the input object to transform
      Returns:
      the transformed result