HandlerExceptionResolver


1   /*
2    * Copyright 2002-2005 the original author or authors.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.web.portlet;
18  
19  import javax.portlet.RenderRequest;
20  import javax.portlet.RenderResponse;
21  
22  /**
23   * Interface to be implemented by objects than can resolve exceptions thrown
24   * during handler mapping or execution, in the typical case to error views.
25   * Implementors are typically registered as beans in the application context.
26   *
27   * <p>Error views are analogous to the error page JSPs, but can be used with
28   * any kind of exception including any checked exception, with potentially
29   * fine-granular mappings for specific handlers.
30   *
31   * @author Juergen Hoeller
32   * @author John A. Lewis
33   * @since 2.0
34   */
35  public interface HandlerExceptionResolver {
36  
37      /**
38       * Try to resolve the given exception that got thrown during on handler execution,
39       * returning a ModelAndView that represents a specific error page if appropriate.
40       * @param request current portlet request
41       * @param response current portlet response
42       * @param handler the executed handler, or null if none chosen at the time of
43       * the exception (for example, if multipart resolution failed)
44       * @param ex the exception that got thrown during handler execution
45       * @return a corresponding ModelAndView to forward to, or null for default processing
46       */
47      ModelAndView resolveException(
48              RenderRequest request, RenderResponse response, Object   handler, Exception   ex);
49  
50  }
51
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