1 /*
2 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
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 result object. A
29 * function may variously provide a mapping between types, object instances or
30 * keys and values or any other form of transformation upon the input.
31 *
32 * @param <T> the type of input objects to the {@code apply} operation
33 * @param <R> the type of result objects from the {@code apply} operation. May
34 * be the same type as {@code <T>}.
35 *
36 * @since 1.8
37 */
38 public interface Function<T, R> {
39
40 /**
41 * Yield an appropriate result object for the input object.
42 *
43 * @param t the input object
44 * @return the function result
45 */
46 public R apply(T t);
47 }
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1 /*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
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 result object. A
29 * function may variously provide a mapping between types, object instances or
30 * keys and values or any other form of transformation upon the input.
31 *
32 * @param <T> the type of input objects to the {@code apply} operation
33 * @param <R> the type of result objects from the {@code apply} operation. May
34 * be the same type as {@code <T>}.
35 *
36 * @since 1.8
37 */
38 @FunctionalInterface
39 public interface Function<T, R> {
40
41 /**
42 * Yield an appropriate result object for the input object.
43 *
44 * @param t the input object
45 * @return the function result
46 */
47 public R apply(T t);
48 }
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