001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.core.request.handler; 018 019import org.apache.wicket.request.IRequestCycle; 020import org.apache.wicket.request.IRequestHandler; 021import org.apache.wicket.request.IRequestHandlerDelegate; 022import org.apache.wicket.request.Request; 023import org.apache.wicket.request.cycle.RequestCycle; 024import org.apache.wicket.util.lang.Args; 025 026/** 027 * A {@link IRequestHandler} that sets the current {@link Request} before delegating the responding 028 * to a wrapped request handler. This is useful when the request received from the browser is not the same 029 * request used to respond, like when the request mapper clones the request with a new URL. 030 * 031 * @author Jesse Long 032 */ 033public class RequestSettingRequestHandler implements IRequestHandlerDelegate 034{ 035 private final Request request; 036 private final IRequestHandler delegate; 037 038 /** 039 * Creates a new instance 040 * @param request 041 * The request to use when responding 042 * @param delegate 043 * The request handler to delegate responding to 044 */ 045 public RequestSettingRequestHandler(Request request, IRequestHandler delegate) 046 { 047 this.request = Args.notNull(request, "request"); 048 this.delegate = Args.notNull(delegate,"delegate"); 049 } 050 051 /** 052 * Returns the request that will be set before responding. 053 * @return the request that will be set before responding. 054 */ 055 public Request getRequest() 056 { 057 return request; 058 } 059 060 /** 061 * Returns the request handler to which responding will be delegated. 062 * @return the request handler to which responding will be delegated. 063 */ 064 @Override 065 public IRequestHandler getDelegateHandler() 066 { 067 return delegate; 068 } 069 070 @Override 071 public void respond(IRequestCycle requestCycle) 072 { 073 RequestCycle cycle = (RequestCycle) requestCycle; 074 Request originalRequest = cycle.getRequest(); 075 try 076 { 077 cycle.setRequest(request); 078 delegate.respond(requestCycle); 079 } 080 finally 081 { 082 cycle.setRequest(originalRequest); 083 } 084 } 085 086 @Override 087 public void detach(IRequestCycle requestCycle) 088 { 089 delegate.detach(requestCycle); 090 } 091}