Package org.apache.commons.collections4.functors

Class NotPredicate<T>

java.lang.Object
org.apache.commons.collections4.functors.NotPredicate<T>
All Implemented Interfaces:
Serializable, PredicateDecorator<T>, Predicate<T>
public final class NotPredicate<T> extends Object implements PredicateDecorator<T>, Serializable
Predicate implementation that returns the opposite of the decorated predicate.
Since:
3.0
See Also:

  • Constructor Details

    • NotPredicate

      public NotPredicate(Predicate<? super T> predicate)
      Constructor that performs no validation. Use notPredicate if you want that.
      Parameters:
      predicate - the predicate to call after the null check

  • Method Details

    • notPredicate

      public static <T> Predicate<T> notPredicate(Predicate<? super T> predicate)
      Factory to create the not predicate.
      Type Parameters:
      T - the type that the predicate queries
      Parameters:
      predicate - the predicate to decorate, not null
      Returns:
      the predicate
      Throws:
      NullPointerException - if the predicate is null

    • evaluate

      public boolean evaluate(T object)
      Evaluates the predicate returning the opposite to the stored predicate.
      Specified by:
      evaluate in interface Predicate<T>
      Parameters:
      object - the input object
      Returns:
      true if predicate returns false

    • 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