/*

  * Copyright 2006-2011 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.framework.persistence.ojb;

 import java.util.Collections;

 import java.util.HashSet;

 import java.util.Set;

 import org.apache.commons.lang.exception.ExceptionUtils;

 import org.apache.ojb.broker.OptimisticLockException;

 import org.springframework.dao.OptimisticLockingFailureException;

 /**

  * This is a description of what this class does - ewestfal don't forget to fill this in.

  *

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

  *

  */

 public final class DataAccessUtils {

     private static final Set<Class<? extends Throwable>> OPTIMISTIC_LOCK_EXCEPTION_CLASSES = new HashSet<Class<? extends Throwable>>();

         private DataAccessUtils() {

                 throw new UnsupportedOperationException("do not call");

         }

     // add some standard optimistic lock exception classes

     static {

         addOptimisticLockExceptionClass(OptimisticLockException.class);

         addOptimisticLockExceptionClass(OptimisticLockingFailureException.class);

     }

     public static synchronized boolean isOptimisticLockFailure(Throwable exception) {

         if (exception == null) {

             return false;

         }

         for (final Class<?> exceptionClass : getOptimisticLockExceptionClasses()) {

             if (ExceptionUtils.indexOfType(exception, exceptionClass) >= 0) {

                 return true;

             }

         }

         return false;

     }

     public static synchronized void addOptimisticLockExceptionClass(Class<? extends Throwable> exceptionClass) {

         OPTIMISTIC_LOCK_EXCEPTION_CLASSES.add(exceptionClass);

     }

     public static synchronized Set<Class<? extends Throwable>> getOptimisticLockExceptionClasses() {

         return Collections.unmodifiableSet(OPTIMISTIC_LOCK_EXCEPTION_CLASSES);

     }

 }