Class NullPredicate

  • All Implemented Interfaces:
    Serializable, Predicate

    public final class NullPredicate
    extends Object
    implements Predicate, Serializable
    Predicate implementation that returns true if the input is null.
    Since:
    Commons Collections 3.0
    Version:
    $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
    Author:
    Stephen Colebourne
    See Also:
    Serialized Form
    • Field Detail

      • INSTANCE

        public static final Predicate INSTANCE
        Singleton predicate instance
    • Method Detail

      • getInstance

        public static Predicate getInstance()
        Factory returning the singleton instance.
        Returns:
        the singleton instance
        Since:
        Commons Collections 3.1
      • evaluate

        public boolean evaluate​(Object object)
        Evaluates the predicate returning true if the input is null.
        Specified by:
        evaluate in interface Predicate
        Parameters:
        object - the input object
        Returns:
        true if input is null