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1   /*
2    *    Copyright 2009-2022 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    *       https://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  package org.apache.ibatis.reflection;
17  
18  import java.lang.reflect.InvocationTargetException;
19  import java.lang.reflect.UndeclaredThrowableException;
20  
21  /**
22   * @author Clinton Begin
23   */
24  public class ExceptionUtil {
25  
26    private ExceptionUtil() {
27      // Prevent Instantiation
28    }
29  
30    public static Throwable unwrapThrowable(Throwable wrapped) {
31      Throwable unwrapped = wrapped;
32      while (true) {
33        if (unwrapped instanceof InvocationTargetException) {
34          unwrapped = ((InvocationTargetException) unwrapped).getTargetException();
35        } else if (unwrapped instanceof UndeclaredThrowableException) {
36          unwrapped = ((UndeclaredThrowableException) unwrapped).getUndeclaredThrowable();
37        } else {
38          return unwrapped;
39        }
40      }
41    }
42  
43  }