Method: empty()

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: }