/*
* Copyright 2002-2011 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 java.util.Map;
import org.springframework.core.MethodParameter;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.validation.DataBinder;
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.mvc.support.RedirectAttributes;
import org.springframework.web.servlet.mvc.support.RedirectAttributesModelMap;
/**
* Resolves method arguments of type {@link RedirectAttributes}.
*
* <p>This resolver must be listed ahead of {@link org.springframework.web.method.annotation.ModelMethodProcessor} and
* {@link org.springframework.web.method.annotation.MapMethodProcessor}, which support {@link Map} and {@link Model}
* arguments both of which are "super" types of {@code RedirectAttributes}
* and would also attempt to resolve a {@code RedirectAttributes} argument.
*
* @author Rossen Stoyanchev
* @since 3.1
*/
public class RedirectAttributesMethodArgumentResolver implements HandlerMethodArgumentResolver {
public boolean supportsParameter(MethodParameter parameter) {
return RedirectAttributes.class.isAssignableFrom(parameter.getParameterType());
}
public Object resolveArgument(MethodParameter parameter,
ModelAndViewContainer mavContainer,
NativeWebRequest webRequest,
WebDataBinderFactory binderFactory) throws Exception {
DataBinder dataBinder = binderFactory.createBinder(webRequest, null, null);
ModelMap redirectAttributes = new RedirectAttributesModelMap(dataBinder);
mavContainer.setRedirectModel(redirectAttributes);
return redirectAttributes;
}
}