11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
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 }
|
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
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 * <p/>When used as a {@code Function} the default {@code apply} implementation
32 * provided by this interface neither accepts null parameters nor does it return
33 * null results.
34 *
35 * @param <T> the type of input objects to the function
36 *
37 * @since 1.8
38 */
39 public interface LongFunction<T> extends Function<T, Long> {
40
41 /**
42 * {@inheritDoc}
43 *
44 * @param t {@inheritDoc}, must be non-null
45 * @return {@inheritDoc}, always non-null
46 */
47 @Override
48 public default Long apply(T t) {
49 return applyAsLong(t);
50 }
51
52 /**
53 * Apply a function to the input object yielding an appropriate {@code long}
54 * value.
55 *
56 * @param t the input object
57 * @return the function result value
58 */
59 public long applyAsLong(T t);
60 }
|