src/groovy/org/codehaus/groovy/grails/plugins/web/filters/CompositeInterceptor.groovy

   1 /*
   2  * Copyright 2004-2005 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 package org.codehaus.groovy.grails.plugins.web.filters
  17
  18 import org.springframework.web.servlet.HandlerInterceptor
  19 import javax.servlet.http.HttpServletRequest
  20 import javax.servlet.http.HttpServletResponse
  21 import org.springframework.web.servlet.ModelAndView
  22 import org.apache.commons.logging.LogFactory
  23
  24 /**
  25  * A HandlerInterceptor that is composed of other HandlerInterceptor instances
  26  *
  27  * @author mike
  28  * @author Graeme Rocher
  29  */
  30 class CompositeInterceptor implements HandlerInterceptor {
  31     static final LOG = LogFactory.getLog(CompositeInterceptor)
  32
  33     def handlers
  34
  35     boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) {
  36         if (LOG.isDebugEnabled()) LOG.debug "preHandle ${request}, ${response}, ${o}"
  37
  38         for (handler in handlers) {
  39             if (!handler.preHandle(request, response, o)) return false;
  40         }
  41         return true;
  42     }
  43
  44     void postHandle(HttpServletRequest request, HttpServletResponse response,Object o, ModelAndView modelAndView) throws java.lang.Exception {
  45         if (LOG.isDebugEnabled()) LOG.debug "postHandle ${request}, ${response}, ${o}, ${modelAndView}"
  46
  47         handlers.reverseEach{ handler ->
  48             handler.postHandle(request, response, o, modelAndView);
  49         }
  50     }
  51
  52     void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object o, Exception e) throws java.lang.Exception {
  53         if (LOG.isDebugEnabled()) LOG.debug "afterCompletion ${request}, ${response}, ${o}, ${e}"
  54
  55         handlers.reverseEach{ handler ->
  56             handler.afterCompletion(request, response, o, e);
  57         }
  58     }
  59 }