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 javax.annotation.concurrent.Immutable;
30 import java.util.UUID;
31 import java.io.Serializable;
32 import lombok.EqualsAndHashCode;
33 import lombok.RequiredArgsConstructor;
34
35 /***************************************************************************************************************************************************************
36 *
37 * An opaque wrapper for identifiers.
38 *
39 * @author Fabrizio Giudici
40 * @it.tidalwave.javadoc.stable
41 *
42 **************************************************************************************************************************************************************/
43 @Immutable @RequiredArgsConstructor @EqualsAndHashCode
44 public class Id implements Serializable, Comparable<Id>, StringValue
45 {
46 private static final long serialVersionUID = 3309234234279593043L;
47
48 @Nonnull
49 private final Object value;
50
51 /***********************************************************************************************************************************************************
52 * @param value the id value
53 * @return the new instance
54 * @since 3.2-ALPHA-2
55 **********************************************************************************************************************************************************/
56 @Nonnull
57 public static Id of (@Nonnull final Object value)
58 {
59 return new Id(value);
60 }
61
62 /***********************************************************************************************************************************************************
63 * @return the new instance
64 * @since 3.2-ALPHA-9
65 **********************************************************************************************************************************************************/
66 @Nonnull
67 public static Id ofUuid()
68 {
69 return of(UUID.randomUUID().toString());
70 }
71
72 /***********************************************************************************************************************************************************
73 * {@inheritDoc}
74 **********************************************************************************************************************************************************/
75 @Override @Nonnull
76 public String stringValue()
77 {
78 return (value instanceof StringValue) ? ((StringValue)value).stringValue() : value.toString();
79 }
80
81 /***********************************************************************************************************************************************************
82 * {@inheritDoc}
83 **********************************************************************************************************************************************************/
84 // @Override
85 public int compareTo (final Id other)
86 {
87 return stringValue().compareTo(other.stringValue());
88 }
89
90 /***********************************************************************************************************************************************************
91 * {@inheritDoc}
92 **********************************************************************************************************************************************************/
93 @Override @Nonnull
94 public String toString()
95 {
96 return stringValue();
97 }
98 }