org.apache.ibatis.reflection.ExceptionUtil.java Source code

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Here is the source code for org.apache.ibatis.reflection.ExceptionUtil.java

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/**
 *    Copyright 2009-2015 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.reflection;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.UndeclaredThrowableException;

/**
 * @author Clinton Begin
 */
public class ExceptionUtil {

    private ExceptionUtil() {
        // Prevent Instantiation
    }

    public static Throwable unwrapThrowable(Throwable wrapped) {
        Throwable unwrapped = wrapped;
        while (true) {
            if (unwrapped instanceof InvocationTargetException) {
                unwrapped = ((InvocationTargetException) unwrapped).getTargetException();
            } else if (unwrapped instanceof UndeclaredThrowableException) {
                unwrapped = ((UndeclaredThrowableException) unwrapped).getUndeclaredThrowable();
            } else {
                return unwrapped;
            }
        }
    }

}