1 /* 2 * Copyright (c) 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.internal.value; 27 28 public final class NormalCheckedType implements CheckedType { 29 private final Class<?> type; 30 private NormalCheckedType(Class<?> cls) { 31 this.type = cls; 32 } 33 34 @Override 35 public Object cast(Object obj) { 36 return type.cast(obj); 37 } 38 39 @Override 40 public boolean canCast(Object obj) { 41 return type.isAssignableFrom(obj.getClass()); 42 } 43 44 @Override 45 public Class<?> boundingClass() { 46 return type; 47 } 48 49 /** 50 * {@returns a {@linkplain CheckedType checked type} for the given class if it is a checked type} 51 * 52 * A primitive type and {@code void} is not a checked type. 53 * 54 * @param cls {@code Class} object 55 * @throws IllegalArgumentException if the given class is a primitive type 56 */ 57 public static CheckedType of(Class<?> cls) { 58 if (cls.isPrimitive()) 59 throw new IllegalArgumentException(cls.getName() + " not a checked type"); 60 return new NormalCheckedType(cls); 61 } 62 }