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 }