Class NullPredicate<T>

java.lang.Object
org.apache.commons.collections4.functors.NullPredicate<T>
All Implemented Interfaces:
Serializable, Predicate<T>, Predicate<T>

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

  • Method Details

    • 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