/*

  * 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.io.IOException;

 import java.util.HashMap;

 import java.util.Map;

 import javax.faces.context.ExternalContext;

 import javax.faces.context.FacesContext;

 import javax.servlet.ServletRequest;

 import org.seasar.framework.log.Logger;

 /**

  * @author higa

  * @author shot

  */

 public class ServletErrorPageManagerImpl implements ErrorPageManager {

     private static final Logger logger = Logger

             .getLogger(ServletErrorPageManagerImpl.class);

     protected Map locations = new HashMap();

     public void addErrorPage(Class exceptionType, String location) {

         locations.put(exceptionType, location);

     }

     public boolean handleException(Throwable exception, FacesContext context,

             ExternalContext extContext) throws IOException {

         if (logger.isDebugEnabled()) {

             logger.log("ETDA0001", new Object[0], exception);

         }

         String location = getLocation(exception.getClass());

         if (location == null) {

             return false;

         }

         ServletRequest request = ServletExternalContextUtil

                 .getRequest(extContext);

         ServletExternalContextUtil

                 .storeErrorInfoToAttribute(request, exception);

         extContext.dispatch(location);

         return true;

     }

     protected String getLocation(Class exceptionType) {

         Class clazz = exceptionType;

         String location = (String) locations.get(clazz);

         while (location == null && !clazz.equals(Throwable.class)) {

             clazz = clazz.getSuperclass();

             location = (String) locations.get(clazz);

         }

         return location;

     }

 }