1 /*
2 * Copyright 2002-2009 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.springframework.core;
18
19 import java.io.IOException;
20
21 /**
22 * Subclass of {@link IOException} that properly handles a root cause,
23 * exposing the root cause just like NestedChecked/RuntimeException does.
24 *
25 * <p>Proper root cause handling has not been added to standard IOException before
26 * Java 6, which is why we need to do it ourselves for Java 5 compatibility purposes.
27 *
28 * <p>The similarity between this class and the NestedChecked/RuntimeException
29 * class is unavoidable, as this class needs to derive from IOException.
30 *
31 * @author Juergen Hoeller
32 * @since 2.0
33 * @see #getMessage
34 * @see #printStackTrace
35 * @see org.springframework.core.NestedCheckedException
36 * @see org.springframework.core.NestedRuntimeException
37 */
38 public class NestedIOException extends IOException {
39
40 static {
41 // Eagerly load the NestedExceptionUtils class to avoid classloader deadlock
42 // issues on OSGi when calling getMessage(). Reported by Don Brown; SPR-5607.
43 NestedExceptionUtils.class.getName();
44 }
45
46
47 /**
48 * Construct a <code>NestedIOException</code> with the specified detail message.
49 * @param msg the detail message
50 */
51 public NestedIOException(String msg) {
52 super(msg);
53 }
54
55 /**
56 * Construct a <code>NestedIOException</code> with the specified detail message
57 * and nested exception.
58 * @param msg the detail message
59 * @param cause the nested exception
60 */
61 public NestedIOException(String msg, Throwable cause) {
62 super(msg);
63 initCause(cause);
64 }
65
66
67 /**
68 * Return the detail message, including the message from the nested exception
69 * if there is one.
70 */
71 @Override
72 public String getMessage() {
73 return NestedExceptionUtils.buildMessage(super.getMessage(), getCause());
74 }
75
76 }