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.mock.web; 018 019import java.io.IOException; 020import javax.servlet.Filter; 021import javax.servlet.FilterChain; 022import javax.servlet.Servlet; 023import javax.servlet.ServletException; 024import javax.servlet.ServletRequest; 025import javax.servlet.ServletResponse; 026 027import org.springframework.util.Assert; 028 029/** 030 * Implementation of the {@link javax.servlet.FilterConfig} interface which 031 * simply passes the call through to a given Filter/FilterChain combination 032 * (indicating the next Filter in the chain along with the FilterChain that it is 033 * supposed to work on) or to a given Servlet (indicating the end of the chain). 034 * 035 * @author Juergen Hoeller 036 * @since 2.0.3 037 * @see javax.servlet.Filter 038 * @see javax.servlet.Servlet 039 * @see MockFilterChain 040 */ 041public class PassThroughFilterChain implements FilterChain { 042 043 private Filter filter; 044 045 private FilterChain nextFilterChain; 046 047 private Servlet servlet; 048 049 050 /** 051 * Create a new PassThroughFilterChain that delegates to the given Filter, 052 * calling it with the given FilterChain. 053 * @param filter the Filter to delegate to 054 * @param nextFilterChain the FilterChain to use for that next Filter 055 */ 056 public PassThroughFilterChain(Filter filter, FilterChain nextFilterChain) { 057 Assert.notNull(filter, "Filter must not be null"); 058 Assert.notNull(nextFilterChain, "'FilterChain must not be null"); 059 this.filter = filter; 060 this.nextFilterChain = nextFilterChain; 061 } 062 063 /** 064 * Create a new PassThroughFilterChain that delegates to the given Servlet. 065 * @param servlet the Servlet to delegate to 066 */ 067 public PassThroughFilterChain(Servlet servlet) { 068 Assert.notNull(servlet, "Servlet must not be null"); 069 this.servlet = servlet; 070 } 071 072 073 /** 074 * Pass the call on to the Filter/Servlet. 075 */ 076 @Override 077 public void doFilter(ServletRequest request, ServletResponse response) throws ServletException, IOException { 078 if (this.filter != null) { 079 this.filter.doFilter(request, response, this.nextFilterChain); 080 } 081 else { 082 this.servlet.service(request, response); 083 } 084 } 085 086}