/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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.seasar.teeda.core.util;

 import java.util.Iterator;

 import java.util.List;

 import org.seasar.framework.log.Logger;

 /**

  * @author shot

  */

 public class CancelUtil {

     private static final Logger logger = Logger.getLogger(CancelUtil.class);

     private static CancelHandler handler = null;

     public static boolean isCancelled(Throwable t) {

         if (t == null) {

             return false;

         }

         if (handler == null) {

             handler = (CancelHandler) DIContainerUtil

                     .getComponentNoException(CancelHandler.class);

             if (handler == null) {

                 return false;

             }

         }

         final List candidates = handler.getCancellableExceptions();

         for (Iterator itr = candidates.iterator(); itr.hasNext();) {

             Class tc = (Class) itr.next();

             if (t.getClass() == tc) {

                 logger.log("WTDA0206", new Object[] { t });

                 return true;

             }

         }

         final List nameCandidates = handler.getCancellableExceptionNames();

         for (Iterator itr = nameCandidates.iterator(); itr.hasNext();) {

             final String name = (String) itr.next();

             if (t.getClass().getName().endsWith(name)) {

                 logger.log("WTDA0206", new Object[] { t });

                 return true;

             }

         }

         return false;

     }

     public static void clear() {

         handler = null;

     }

 }