Class IsNotNull<T>

java.lang.Object
org.apache.commons.functor.core.IsNotNull<T>
Type Parameters:
T - the argument type.
All Implemented Interfaces:
Serializable, Functor, UnaryFunctor<T>, UnaryPredicate<T>
public final class IsNotNull<T> extends Object implements UnaryPredicate<T>, Serializable
Tests false iff its argument is null.
Version:
$Revision$ $Date$
See Also:

  • Field Details

  • Constructor Details

    • IsNotNull

      public IsNotNull()
      Create a new IsNotNull.

  • Method Details

    • test

      public boolean test(Object obj)
      Evaluate this predicate.
      Specified by:
      test in interface UnaryPredicate<T>
      Parameters:
      obj - the A object to test
      Returns:
      the result of this test

    • equals

      public boolean equals(Object that)
      Indicates whether some other object is "equal to" this functor. This method must adhere to general Object.equals contract. Additionally, this method can return true only if the specified Object implements the same functor interface and is known to produce the same results and/or side-effects for the same arguments (if any).

      While implementators are strongly encouraged to override the default Object implementation of this method, note that the default Object implementation does in fact adhere to the functor equals contract.

      Specified by:
      equals in interface Functor
      Overrides:
      equals in class Object
      Parameters:
      that - the object to compare this functor to
      Returns:
      true iff the given object implements this functor interface, and is known to produce the same results and/or side-effects for the same arguments (if any).
      See Also:

    • hashCode

      public int hashCode()
      Returns a hash code for this functor adhering to the general Object.hashCode contract. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.
      Specified by:
      hashCode in interface Functor
      Overrides:
      hashCode in class Object
      Returns:
      a hash code for this functor
      See Also:

    • toString

      public String toString()
      Returns a human readable description of this functor. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.
      Specified by:
      toString in interface Functor
      Overrides:
      toString in class Object
      Returns:
      a human readable description of this functor

    • instance

      public static <T> IsNotNull<T> instance()
      Get an IsNotNull instance.
      Type Parameters:
      T - the predicate argument type.
      Returns:
      IsNotNull

    • left

      public static <A> BinaryPredicate<A,Object> left()
      Get a BinaryPredicate that matches if the left argument is not null.
      Type Parameters:
      A - the left BinaryPredicate argument type.
      Returns:
      BinaryPredicateinvalid input: '<'A, Object>

    • right

      public static <A> BinaryPredicate<Object,A> right()
      Get a BinaryPredicate that matches if the right argument is null.
      Type Parameters:
      A - the right BinaryPredicate argument type.
      Returns:
      BinaryPredicateinvalid input: '<'Object, A>