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