/*
* Copyright 2002-2010 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.config;
import java.util.Map;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.parsing.BeanComponentDefinition;
import org.springframework.beans.factory.support.ManagedMap;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping;
import org.springframework.web.servlet.mvc.ParameterizableViewController;
import org.w3c.dom.Element;
/**
* {@link org.springframework.beans.factory.xml.BeanDefinitionParser} that parses a
* {@code view-controller} element to register a {@link ParameterizableViewController}.
* Will also register a {@link SimpleUrlHandlerMapping} for view controllers.
*
* @author Keith Donald
* @author Christian Dupuis
* @since 3.0
*/
class ViewControllerBeanDefinitionParser implements BeanDefinitionParser {
private static final String HANDLER_MAPPING_BEAN_NAME =
"org.springframework.web.servlet.config.viewControllerHandlerMapping";
public BeanDefinition parse(Element element, ParserContext parserContext) {
Object source = parserContext.extractSource(element);
// Register SimpleUrlHandlerMapping for view controllers
BeanDefinition handlerMappingDef = registerHandlerMapping(parserContext, source);
// Ensure BeanNameUrlHandlerMapping (SPR-8289) and default HandlerAdapters are not "turned off"
MvcNamespaceUtils.registerDefaultComponents(parserContext, source);
// Create view controller bean definition
RootBeanDefinition viewControllerDef = new RootBeanDefinition(ParameterizableViewController.class);
viewControllerDef.setSource(source);
if (element.hasAttribute("view-name")) {
viewControllerDef.getPropertyValues().add("viewName", element.getAttribute("view-name"));
}
Map<String, BeanDefinition> urlMap;
if (handlerMappingDef.getPropertyValues().contains("urlMap")) {
urlMap = (Map<String, BeanDefinition>) handlerMappingDef.getPropertyValues().getPropertyValue("urlMap").getValue();
}
else {
urlMap = new ManagedMap<String, BeanDefinition>();
handlerMappingDef.getPropertyValues().add("urlMap", urlMap);
}
urlMap.put(element.getAttribute("path"), viewControllerDef);
return null;
}
private BeanDefinition registerHandlerMapping(ParserContext parserContext, Object source) {
if (!parserContext.getRegistry().containsBeanDefinition(HANDLER_MAPPING_BEAN_NAME)) {
RootBeanDefinition handlerMappingDef = new RootBeanDefinition(SimpleUrlHandlerMapping.class);
handlerMappingDef.setSource(source);
handlerMappingDef.getPropertyValues().add("order", "1");
handlerMappingDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
parserContext.getRegistry().registerBeanDefinition(HANDLER_MAPPING_BEAN_NAME, handlerMappingDef);
parserContext.registerComponent(new BeanComponentDefinition(handlerMappingDef, HANDLER_MAPPING_BEAN_NAME));
return handlerMappingDef;
}
else {
return parserContext.getRegistry().getBeanDefinition(HANDLER_MAPPING_BEAN_NAME);
}
}
}