Package org.apache.commons.collections4.functors

Class NullIsExceptionPredicate<T>

  • All Implemented Interfaces:
    java.io.Serializable, PredicateDecorator<T>, Predicate<T>
    public final class NullIsExceptionPredicate<T>
extends java.lang.Object
implements PredicateDecorator<T>, java.io.Serializable
    Predicate implementation that throws an exception if the input is null.
    Since:
    3.0
    See Also:
    Serialized Form

    • Constructor Detail

      • NullIsExceptionPredicate

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

    • Method Detail

      • nullIsExceptionPredicate

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

      • evaluate

        public boolean evaluate​(T object)
        Evaluates the predicate returning the result of the decorated predicate once a null check is performed.
        Specified by:
        evaluate in interface Predicate<T>
        Parameters:
        object - the input object
        Returns:
        true if decorated predicate returns true
        Throws:
        FunctorException - if input is null

      • 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