001/*
002 * Copyright 2002-2017 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.web.servlet.handler;
018
019import javax.servlet.http.HttpServletRequest;
020import javax.servlet.http.HttpServletResponse;
021
022import org.springframework.lang.Nullable;
023import org.springframework.util.Assert;
024import org.springframework.web.context.request.AsyncWebRequestInterceptor;
025import org.springframework.web.context.request.WebRequestInterceptor;
026import org.springframework.web.servlet.AsyncHandlerInterceptor;
027import org.springframework.web.servlet.ModelAndView;
028
029/**
030 * Adapter that implements the Servlet HandlerInterceptor interface
031 * and wraps an underlying WebRequestInterceptor.
032 *
033 * @author Juergen Hoeller
034 * @since 2.0
035 * @see org.springframework.web.context.request.WebRequestInterceptor
036 * @see org.springframework.web.servlet.HandlerInterceptor
037 */
038public class WebRequestHandlerInterceptorAdapter implements AsyncHandlerInterceptor {
039
040        private final WebRequestInterceptor requestInterceptor;
041
042
043        /**
044         * Create a new WebRequestHandlerInterceptorAdapter for the given WebRequestInterceptor.
045         * @param requestInterceptor the WebRequestInterceptor to wrap
046         */
047        public WebRequestHandlerInterceptorAdapter(WebRequestInterceptor requestInterceptor) {
048                Assert.notNull(requestInterceptor, "WebRequestInterceptor must not be null");
049                this.requestInterceptor = requestInterceptor;
050        }
051
052
053        @Override
054        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
055                        throws Exception {
056
057                this.requestInterceptor.preHandle(new DispatcherServletWebRequest(request, response));
058                return true;
059        }
060
061        @Override
062        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
063                        @Nullable ModelAndView modelAndView) throws Exception {
064
065                this.requestInterceptor.postHandle(new DispatcherServletWebRequest(request, response),
066                                (modelAndView != null && !modelAndView.wasCleared() ? modelAndView.getModelMap() : null));
067        }
068
069        @Override
070        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
071                        @Nullable Exception ex) throws Exception {
072
073                this.requestInterceptor.afterCompletion(new DispatcherServletWebRequest(request, response), ex);
074        }
075
076        @Override
077        public void afterConcurrentHandlingStarted(HttpServletRequest request, HttpServletResponse response, Object handler) {
078                if (this.requestInterceptor instanceof AsyncWebRequestInterceptor) {
079                        AsyncWebRequestInterceptor asyncInterceptor = (AsyncWebRequestInterceptor) this.requestInterceptor;
080                        DispatcherServletWebRequest webRequest = new DispatcherServletWebRequest(request, response);
081                        asyncInterceptor.afterConcurrentHandlingStarted(webRequest);
082                }
083        }
084
085}