Package org.apache.commons.collections.functors

Class UniquePredicate

  • All Implemented Interfaces:
    java.io.Serializable, Predicate
    @Deprecated(since="2021-04-30")
public final class UniquePredicate
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 the first time an object is passed into the predicate.
    Since:
    Commons Collections 3.0
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      UniquePredicate()
      Deprecated.
      Constructor that performs no validation.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      boolean evaluate​(java.lang.Object object)
      Deprecated.
      Evaluates the predicate returning true if the input object hasn't been received yet.
      static Predicate getInstance()
      Deprecated.
      Factory to create the predicate.

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • 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:
        java.lang.IllegalArgumentException - if the predicate is null

      • evaluate

        public boolean evaluate​(java.lang.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