Class NullPredicate<T>

  • All Implemented Interfaces:
    java.io.Serializable, Predicate<T>

    public final class NullPredicate<T>
    extends java.lang.Object
    implements Predicate<T>, java.io.Serializable
    Predicate implementation that returns true if the input is null.
    Since:
    3.0
    See Also:
    Serialized Form
    • Field Summary

      Fields 
      Modifier and Type Field Description
      static Predicate INSTANCE
      Singleton predicate instance
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean evaluate​(T object)
      Evaluates the predicate returning true if the input is null.
      static <T> Predicate<T> nullPredicate()
      Factory returning the singleton instance.
      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • INSTANCE

        public static final Predicate INSTANCE
        Singleton predicate instance
    • Method Detail

      • nullPredicate

        public static <T> Predicate<T> nullPredicate()
        Factory returning the singleton instance.
        Type Parameters:
        T - the type that the predicate queries
        Returns:
        the singleton instance
        Since:
        3.1
      • evaluate

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