/*
    * Copyright 2002-2014 the original author or authors.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.springframework.web.servlet.mvc.method.annotation;
  
  import javax.servlet.http.HttpServletRequest;
  
  import org.springframework.core.MethodParameter;
  import org.springframework.web.bind.support.WebDataBinderFactory;
  import org.springframework.web.context.request.NativeWebRequest;
  import org.springframework.web.method.support.HandlerMethodArgumentResolver;
  import org.springframework.web.method.support.ModelAndViewContainer;
  import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
  import org.springframework.web.util.UriComponentsBuilder;
  
  /**
   * Resolvers argument values of type {@link UriComponentsBuilder}.
   *
   * <p>The returned instance is initialized via
   * {@link ServletUriComponentsBuilder#fromServletMapping(HttpServletRequest)}.
   *
   * @author Rossen Stoyanchev
   * @since 3.1
   */
  public class UriComponentsBuilderMethodArgumentResolver implements HandlerMethodArgumentResolver {
  
  	@Override
  	public boolean supportsParameter(MethodParameter parameter) {
  		return UriComponentsBuilder.class.isAssignableFrom(parameter.getParameterType());
  	}
  
  	@Override
  	public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
  			NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
  
  		HttpServletRequest request = webRequest.getNativeRequest(HttpServletRequest.class);
  		return ServletUriComponentsBuilder.fromServletMapping(request);
  	}
  
  }