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 }