001/* 002 * Copyright 2002-2016 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.web.servlet.AsyncHandlerInterceptor; 023import org.springframework.web.servlet.ModelAndView; 024 025/** 026 * Abstract adapter class for the {@link AsyncHandlerInterceptor} interface, 027 * for simplified implementation of pre-only/post-only interceptors. 028 * 029 * @author Juergen Hoeller 030 * @since 05.12.2003 031 */ 032public abstract class HandlerInterceptorAdapter implements AsyncHandlerInterceptor { 033 034 /** 035 * This implementation always returns {@code true}. 036 */ 037 @Override 038 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) 039 throws Exception { 040 041 return true; 042 } 043 044 /** 045 * This implementation is empty. 046 */ 047 @Override 048 public void postHandle( 049 HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) 050 throws Exception { 051 } 052 053 /** 054 * This implementation is empty. 055 */ 056 @Override 057 public void afterCompletion( 058 HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) 059 throws Exception { 060 } 061 062 /** 063 * This implementation is empty. 064 */ 065 @Override 066 public void afterConcurrentHandlingStarted( 067 HttpServletRequest request, HttpServletResponse response, Object handler) 068 throws Exception { 069 } 070 071}