1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.bcel.verifier.exc;
18
19 /**
20 * Instances of this class are thrown by BCEL's class file verifier "JustIce" whenever verification proves that some
21 * constraint of a class file (as stated in the Java Virtual Machine Specification, Edition 2) is violated. This is
22 * roughly equivalent to the VerifyError the JVM-internal verifiers throw.
23 */
24 public abstract class VerifierConstraintViolatedException extends RuntimeException {
25 // /** The name of the offending class that did not pass the verifier. */
26 // String name_of_offending_class;
27
28 private static final long serialVersionUID = 2946136970490179465L;
29 /** The specified error message. */
30 private String detailMessage;
31
32 /**
33 * Constructs a new VerifierConstraintViolatedException with null as its error message string.
34 */
35 VerifierConstraintViolatedException() {
36 }
37
38 /**
39 * Constructs a new VerifierConstraintViolatedException with the specified error message.
40 */
41 VerifierConstraintViolatedException(final String message) {
42 super(message); // Not that important
43 detailMessage = message;
44 }
45
46 /**
47 * Constructs a new VerifierConstraintViolationException with the specified error message and cause
48 */
49 VerifierConstraintViolatedException(final String message, final Throwable initCause) {
50 super(message, initCause);
51 detailMessage = message;
52 }
53
54 /**
55 * Extends the error message with a string before ("pre") and after ("post") the 'old' error message. All of these three
56 * strings are allowed to be null, and null is always replaced by the empty string (""). In particular, after invoking
57 * this method, the error message of this object can no longer be null.
58 */
59 public void extendMessage(String pre, String post) {
60 if (pre == null) {
61 pre = "";
62 }
63 if (detailMessage == null) {
64 detailMessage = "";
65 }
66 if (post == null) {
67 post = "";
68 }
69 detailMessage = pre + detailMessage + post;
70 }
71
72 /**
73 * Returns the error message string of this VerifierConstraintViolatedException object.
74 *
75 * @return the error message string of this VerifierConstraintViolatedException.
76 */
77 @Override
78 public String getMessage() {
79 return detailMessage;
80 }
81 }