Interface FailablePredicate<T,​E extends java.lang.Throwable>

  • Type Parameters:
    T - Predicate type.
    E - Thrown exception.
    Functional Interface:
    This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

    @FunctionalInterface
    public interface FailablePredicate<T,​E extends java.lang.Throwable>
    A functional interface like Predicate that declares a Throwable.
    Since:
    3.11
    • Method Detail

      • falsePredicate

        static <T,​E extends java.lang.Throwable> FailablePredicate<T,​E> falsePredicate()
        Returns The FALSE singleton.
        Type Parameters:
        T - Predicate type.
        E - Thrown exception.
        Returns:
        The NOP singleton.
      • truePredicate

        static <T,​E extends java.lang.Throwable> FailablePredicate<T,​E> truePredicate()
        Returns The FALSE TRUE.
        Type Parameters:
        T - Predicate type.
        E - Thrown exception.
        Returns:
        The NOP singleton.
      • and

        default FailablePredicate<T,​E> and​(FailablePredicate<? super T,​E> other)
        Returns a composed FailablePredicate like Predicate.and(Predicate).
        Parameters:
        other - a predicate that will be logically-ANDed with this predicate.
        Returns:
        a composed FailablePredicate like Predicate.and(Predicate).
        Throws:
        java.lang.NullPointerException - if other is null
      • negate

        default FailablePredicate<T,​E> negate()
        Returns a predicate that negates this predicate.
        Returns:
        a predicate that negates this predicate.
      • or

        default FailablePredicate<T,​E> or​(FailablePredicate<? super T,​E> other)
        Returns a composed FailablePredicate like Predicate.and(Predicate).
        Parameters:
        other - a predicate that will be logically-ORed with this predicate.
        Returns:
        a composed FailablePredicate like Predicate.and(Predicate).
        Throws:
        java.lang.NullPointerException - if other is null
      • test

        boolean test​(T object)
              throws E extends java.lang.Throwable
        Tests the predicate.
        Parameters:
        object - the object to test the predicate on
        Returns:
        the predicate's evaluation
        Throws:
        E - if the predicate fails
        E extends java.lang.Throwable