unwrapThrowable

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;
}
}
}

}