/*
    * 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.Cookie;
  import javax.servlet.http.HttpServletRequest;
  
  import org.springframework.beans.factory.config.ConfigurableBeanFactory;
  import org.springframework.core.MethodParameter;
  import org.springframework.web.context.request.NativeWebRequest;
  import org.springframework.web.method.annotation.AbstractCookieValueMethodArgumentResolver;
  import org.springframework.web.util.UrlPathHelper;
  import org.springframework.web.util.WebUtils;
  
  /**
   * An {@link org.springframework.web.method.annotation.AbstractCookieValueMethodArgumentResolver}
   * that resolves cookie values from an {@link HttpServletRequest}.
   *
   * @author Rossen Stoyanchev
   * @since 3.1
   */
  public class ServletCookieValueMethodArgumentResolver extends AbstractCookieValueMethodArgumentResolver {
  
  	private UrlPathHelper urlPathHelper = new UrlPathHelper();
  
  
  	public ServletCookieValueMethodArgumentResolver(ConfigurableBeanFactory beanFactory) {
  		super(beanFactory);
  	}
  
  
  	public void setUrlPathHelper(UrlPathHelper urlPathHelper) {
  		this.urlPathHelper = urlPathHelper;
  	}
  
  
  	@Override
  	protected Object resolveName(String cookieName, MethodParameter parameter, NativeWebRequest webRequest) throws Exception {
  		HttpServletRequest servletRequest = webRequest.getNativeRequest(HttpServletRequest.class);
  		Cookie cookieValue = WebUtils.getCookie(servletRequest, cookieName);
  		if (Cookie.class.isAssignableFrom(parameter.getParameterType())) {
  			return cookieValue;
  		}
  		else if (cookieValue != null) {
  			return this.urlPathHelper.decodeRequestString(servletRequest, cookieValue.getValue());
  		}
  		else {
  			return null;
  		}
  	}
  
  }