1 /*
2 * *************************************************************************************************************************************************************
3 *
4 * TheseFoolishThings: Miscellaneous utilities
5 * http://tidalwave.it/projects/thesefoolishthings
6 *
7 * Copyright (C) 2009 - 2024 by Tidalwave s.a.s. (http://tidalwave.it)
8 *
9 * *************************************************************************************************************************************************************
10 *
11 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
17 * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
18 *
19 * *************************************************************************************************************************************************************
20 *
21 * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
22 * git clone https://github.com/tidalwave-it/thesefoolishthings-src
23 *
24 * *************************************************************************************************************************************************************
25 */
26 package it.tidalwave.util;
27
28 import javax.annotation.Nonnull;
29 import java.io.Serializable;
30
31 /***************************************************************************************************************************************************************
32 *
33 * @author Fabrizio Giudici
34 * @it.tidalwave.javadoc.draft
35 *
36 **************************************************************************************************************************************************************/
37 @FunctionalInterface
38 public interface Initializer<T>
39 {
40 /***********************************************************************************************************************************************************
41 * @param object an argument
42 * @return the argument
43 **********************************************************************************************************************************************************/
44 public T initialize (@Nonnull T object);
45
46 /***********************************************************************************************************************************************************
47 * @param <T> the static type
48 * @return an empty initializer
49 * @since 3.2-ALPHA-2
50 **********************************************************************************************************************************************************/
51 @Nonnull
52 public static <T> Initializer<T> empty()
53 {
54 return new EmptyInitializer<>();
55 }
56
57 /***********************************************************************************************************************************************************
58 *
59 **********************************************************************************************************************************************************/
60 static final class EmptyInitializer<K> implements Initializer<K>, Serializable
61 {
62 private static final long serialVersionUID = 6039459583930596L;
63
64 @Override @Nonnull
65 public K initialize (@Nonnull final K entity)
66 {
67 return entity;
68 }
69 }
70 }