src/share/classes/java/util/function/LongFunction.java

rev 6189 : 8004015: Add Extends and deaults for basic functional interface types
Summary: Adds the appropriate extends and default methods for  core functional interfaces used by the JSR335 libraries.
Reviewed-by: duke

*** 26,40 ****
  
  /**
   * Apply a function to the input object yielding an appropriate {@code long}
   * value; this is the {@code long}-bearing specialization for {@link Function}.
   *
   * @param <T> the type of input objects to the function
   *
   * @since 1.8
   */
! public interface LongFunction<T> {
  
      /**
       * Apply a function to the input object yielding an appropriate {@code long}
       * value.
       *
--- 26,55 ----
  
  /**
   * Apply a function to the input object yielding an appropriate {@code long}
   * value; this is the {@code long}-bearing specialization for {@link Function}.
   *
+  * <p>When used as a {@code Function} the default {@code apply} implementation
+  * provided by this interface neither accepts null parameters nor does it return
+  * null results.
+  *
   * @param <T> the type of input objects to the function
   *
   * @since 1.8
   */
! public interface LongFunction<T> extends Function<T, Long> {
! 
!     /**
!      * {@inheritDoc}
!      *
!      * @param t {@inheritDoc}, must be non-null
!      * @return {@inheritDoc}, always non-null
!      */
!     @Override
!     public default Long apply(T t) {
!         return applyAsLong(t);
!     }
  
      /**
       * Apply a function to the input object yielding an appropriate {@code long}
       * value.
       *