1 /*
 2  * Copyright (c) 2020, 2024, 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.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 package org.openjdk.bench.valhalla.types;
24 
25 import java.util.NoSuchElementException;
26 
27 public class ROpt<T> implements Opt<T> {
28 
29     public T value;
30 
31     private <T> ROpt() {
32         this.value = null;
33     }
34 
35     private ROpt(T value) {
36         this.value = value;
37     }
38 
39     public static <T> ROpt<T> of() {
40         return new ROpt<>(null);
41     }
42 
43     public static <T> ROpt<T> of(T value) {
44         return new ROpt<>(value);
45     }
46 
47     public T get() {
48         if (value == null) {
49             throw new NoSuchElementException("No value present");
50         }
51         return value;
52     }
53 
54     public boolean isPresent() {
55         return value != null;
56     }
57 
58     public boolean isEmpty() {
59         return value == null;
60     }
61 }