001/* 002 * Copyright 2002-2012 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.mvc; 018 019import javax.servlet.http.HttpServletRequest; 020import javax.servlet.http.HttpServletResponse; 021 022import org.springframework.web.HttpRequestHandler; 023import org.springframework.web.servlet.HandlerAdapter; 024import org.springframework.web.servlet.ModelAndView; 025 026/** 027 * Adapter to use the plain {@link org.springframework.web.HttpRequestHandler} 028 * interface with the generic {@link org.springframework.web.servlet.DispatcherServlet}. 029 * Supports handlers that implement the {@link LastModified} interface. 030 * 031 * <p>This is an SPI class, not used directly by application code. 032 * 033 * @author Juergen Hoeller 034 * @since 2.0 035 * @see org.springframework.web.servlet.DispatcherServlet 036 * @see org.springframework.web.HttpRequestHandler 037 * @see LastModified 038 * @see SimpleControllerHandlerAdapter 039 */ 040public class HttpRequestHandlerAdapter implements HandlerAdapter { 041 042 @Override 043 public boolean supports(Object handler) { 044 return (handler instanceof HttpRequestHandler); 045 } 046 047 @Override 048 public ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler) 049 throws Exception { 050 051 ((HttpRequestHandler) handler).handleRequest(request, response); 052 return null; 053 } 054 055 @Override 056 public long getLastModified(HttpServletRequest request, Object handler) { 057 if (handler instanceof LastModified) { 058 return ((LastModified) handler).getLastModified(request); 059 } 060 return -1L; 061 } 062 063}