1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.bcel.verifier.exc;
20
21 /**
22 * Instances of this class are thrown by BCEL's class file verifier "JustIce" whenever verification proves that some
23 * constraint of a class file (as stated in the Java Virtual Machine Specification, Edition 2) is violated. This is
24 * roughly equivalent to the VerifyError the JVM-internal verifiers throw.
25 */
26 public abstract class VerifierConstraintViolatedException extends RuntimeException {
27 // /** The name of the offending class that did not pass the verifier. */
28 // String name_of_offending_class;
29
30 private static final long serialVersionUID = 2946136970490179465L;
31
32 /** The specified error message. */
33 private String detailMessage;
34
35 /**
36 * Constructs a new VerifierConstraintViolatedException with null as its error message string.
37 */
38 VerifierConstraintViolatedException() {
39 }
40
41 /**
42 * Constructs a new VerifierConstraintViolatedException with the specified error message.
43 */
44 VerifierConstraintViolatedException(final String message) {
45 super(message); // Not that important
46 detailMessage = message;
47 }
48
49 /**
50 * Constructs a new VerifierConstraintViolationException with the specified error message and cause
51 */
52 VerifierConstraintViolatedException(final String message, final Throwable initCause) {
53 super(message, initCause);
54 detailMessage = message;
55 }
56
57 /**
58 * Extends the error message with a string before ("pre") and after ("post") the 'old' error message. All of these three
59 * strings are allowed to be null, and null is always replaced by the empty string (""). In particular, after invoking
60 * this method, the error message of this object can no longer be null.
61 *
62 * @param pre string to prepend.
63 * @param post string to append.
64 */
65 public void extendMessage(String pre, String post) {
66 if (pre == null) {
67 pre = "";
68 }
69 if (detailMessage == null) {
70 detailMessage = "";
71 }
72 if (post == null) {
73 post = "";
74 }
75 detailMessage = pre + detailMessage + post;
76 }
77
78 /**
79 * Returns the error message string of this VerifierConstraintViolatedException object.
80 *
81 * @return the error message string of this VerifierConstraintViolatedException.
82 */
83 @Override
84 public String getMessage() {
85 return detailMessage;
86 }
87 }