blob: 667d2511ff57ddf67862aae07236f1c7f12c015e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/*
* SonarQube
* Copyright (C) 2009-2018 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package util.selenium;
import java.util.NoSuchElementException;
public final class Optional<T> {
private static final Optional<?> EMPTY = new Optional<>();
private final T value;
private Optional() {
this.value = null;
}
public static <T> Optional<T> empty() {
@SuppressWarnings("unchecked")
Optional<T> t = (Optional<T>) EMPTY;
return t;
}
private Optional(T value) {
this.value = value;
}
public static <T> Optional<T> of(T value) {
return new Optional<>(value);
}
public T get() {
if (value == null) {
throw new NoSuchElementException("No value present");
}
return value;
}
public boolean isPresent() {
return value != null;
}
}
|