Class UniquePredicate

  • All Implemented Interfaces:
    Serializable, Predicate

    @Deprecated(since="2021-04-30")
    public final class UniquePredicate
    extends Object
    implements Predicate, Serializable
    Deprecated.
    Commons Collections 3 is in maintenance mode. Commons Collections 4 should be used instead.
    Predicate implementation that returns true the first time an object is passed into the predicate.
    Since:
    Commons Collections 3.0
    See Also:
    Serialized Form
    • Constructor Detail

      • UniquePredicate

        public UniquePredicate()
        Deprecated.
        Constructor that performs no validation. Use getInstance if you want that.
    • Method Detail

      • getInstance

        public static Predicate getInstance()
        Deprecated.
        Factory to create the predicate.
        Returns:
        the predicate
        Throws:
        IllegalArgumentException - if the predicate is null
      • evaluate

        public boolean evaluate​(Object object)
        Deprecated.
        Evaluates the predicate returning true if the input object hasn't been received yet.
        Specified by:
        evaluate in interface Predicate
        Parameters:
        object - the input object
        Returns:
        true if this is the first time the object is seen