/*

  * Copyright 2005-2007 The Kuali Foundation

  * 

  * 

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  * 

  * 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.kuali.rice.core.util;

 import java.lang.reflect.InvocationTargetException;

 /**

  * Provides some Utilities for handling common Exception scenarios.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public abstract class ExceptionUtils {

         /**

          * Unwraps the appropriate Throwable from the given Throwable.  More specifically, this handles

          * unwrapping causes from InvocationTargetException.

          * @param throwable

          * @return

          */

         public static Throwable unwrapActualCause(Throwable throwable) {

                 Throwable unwrappedThrowable = null;

                 if (throwable instanceof InvocationTargetException) {

                         InvocationTargetException ite = (InvocationTargetException)throwable;

                         if (ite.getCause() != null && ite.getCause() != ite) {

                                 unwrappedThrowable = ite.getCause();

                         }

                 }

                 if (unwrappedThrowable != null && unwrappedThrowable != throwable) {

                         return unwrapActualCause(unwrappedThrowable);

                 }

                 return throwable;

         }

 }