001/* 002 * Copyright 2002-2017 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.method.annotation; 018 019import javax.servlet.http.HttpServletRequest; 020 021import org.springframework.core.MethodParameter; 022import org.springframework.web.bind.support.WebDataBinderFactory; 023import org.springframework.web.context.request.NativeWebRequest; 024import org.springframework.web.method.support.HandlerMethodArgumentResolver; 025import org.springframework.web.method.support.ModelAndViewContainer; 026import org.springframework.web.servlet.support.ServletUriComponentsBuilder; 027import org.springframework.web.util.UriComponentsBuilder; 028 029 030/** 031 * Resolvers argument values of type {@link UriComponentsBuilder}. 032 * 033 * <p>The returned instance is initialized via 034 * {@link ServletUriComponentsBuilder#fromServletMapping(HttpServletRequest)}. 035 * 036 * @author Rossen Stoyanchev 037 * @since 3.1 038 */ 039public class UriComponentsBuilderMethodArgumentResolver implements HandlerMethodArgumentResolver { 040 041 @Override 042 public boolean supportsParameter(MethodParameter parameter) { 043 Class<?> type = parameter.getParameterType(); 044 return (UriComponentsBuilder.class == type || ServletUriComponentsBuilder.class == type); 045 } 046 047 @Override 048 public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, 049 NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception { 050 051 HttpServletRequest request = webRequest.getNativeRequest(HttpServletRequest.class); 052 return ServletUriComponentsBuilder.fromServletMapping(request); 053 } 054 055}