Class NullPredicate

  • All Implemented Interfaces:
    java.io.Serializable, Predicate

    @Deprecated(since="2021-04-30")
    public final class NullPredicate
    extends java.lang.Object
    implements Predicate, java.io.Serializable
    Deprecated.
    Commons Collections 3 is in maintenance mode. Commons Collections 4 should be used instead.
    Predicate implementation that returns true if the input is null.
    Since:
    Commons Collections 3.0
    See Also:
    Serialized Form
    • Field Summary

      Fields 
      Modifier and Type Field Description
      static Predicate INSTANCE
      Deprecated.
      Singleton predicate instance
    • Field Detail

      • INSTANCE

        public static final Predicate INSTANCE
        Deprecated.
        Singleton predicate instance
    • Method Detail

      • getInstance

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

        public boolean evaluate​(java.lang.Object object)
        Deprecated.
        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