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

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rev 6137 : 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


  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.util.function;
  26 
  27 /**
  28  * Apply a function to the input object yielding an appropriate {@code long}
  29  * value; this is the {@code long}-bearing specialization for {@link Function}.
  30  *
  31  * @param <T> the type of input objects to the function
  32  *
  33  * @since 1.8
  34  */
  35 public interface LongFunction<T> {



  36 
  37     /**
  38      * Apply a function to the input object yielding an appropriate {@code long}
  39      * value.
  40      *
  41      * @param t the input object
  42      * @return the function result value
  43      */
  44     public long applyAsLong(T t);
  45 }


  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.util.function;
  26 
  27 /**
  28  * Apply a function to the input object yielding an appropriate {@code long}
  29  * value; this is the {@code long}-bearing specialization for {@link Function}.
  30  *
  31  * @param <T> the type of input objects to the function
  32  *
  33  * @since 1.8
  34  */
  35 public interface LongFunction<T> extends Function<T, Long> {
  36 
  37     @Override
  38     public default Long apply(T t) { return applyAsLong(t); }
  39 
  40     /**
  41      * Apply a function to the input object yielding an appropriate {@code long}
  42      * value.
  43      *
  44      * @param t the input object
  45      * @return the function result value
  46      */
  47     public long applyAsLong(T t);
  48 }