1 /*
 2  * Copyright (c) 2022, 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 package jdk.internal.misc;
26 
27 import java.lang.reflect.Constructor;
28 
29 /**
30  * Defines static methods to allow code in java.base to create or throw
31  * StructureViolationException. This class will go away when the exception
32  * moves to java.base.
33  */
34 public class StructureViolationExceptions {
35     private static final Constructor<?> SVE_CTOR = structureViolationExceptionCtor();
36 
37     private StructureViolationExceptions() { }
38 
39     /**
40      * Creates a StructureViolationException with the given message.
41      */
42     public static RuntimeException newException(String message) {
43         if (SVE_CTOR != null) {
44             try {
45                 return (RuntimeException) SVE_CTOR.newInstance(message);
46             } catch (Exception e) {
47                 throw new InternalError(e);
48             }
49         } else {
50             return new RuntimeException("Structure violation exception: " + message);
51         }
52     }
53 
54     /**
55      * Creates a StructureViolationException with no message.
56      */
57     public static RuntimeException newException() {
58         return newException(null);
59     }
60 
61     /**
62      * Throws a StructureViolationException with the given message.
63      */
64     public static void throwException(String message) {
65         throw newException(message);
66     }
67 
68     /**
69      * Throws a StructureViolationException with no message.
70      */
71     public static void throwException() {
72         throw newException(null);
73     }
74 
75     /**
76      * Returns the StructureViolationException(String) constructor.
77      */
78     private static Constructor<?> structureViolationExceptionCtor() {
79         Constructor<?> ctor;
80         try {
81             Class<?> exClass = Class.forName("jdk.incubator.concurrent.StructureViolationException");
82             ctor = exClass.getConstructor(String.class);
83         } catch (ClassNotFoundException e) {
84             ctor = null;
85         } catch (Exception e) {
86             throw new InternalError(e);
87         }
88         return ctor;
89     }
90 }