/*
* 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 org.w3c.dom.Element;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.parsing.BeanComponentDefinition;
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.mvc.HttpRequestHandlerAdapter;
/**
* Abstract base class for {@link BeanDefinitonParser}s that register an HttpRequestHandler.
*
* @author Jeremy Grelle
* @since 3.0.4
*/
abstract class AbstractHttpRequestHandlerBeanDefinitionParser implements BeanDefinitionParser{
private static final String HANDLER_ADAPTER_BEAN_NAME = "org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter";
public BeanDefinition parse(Element element, ParserContext parserContext) {
Object source = parserContext.extractSource(element);
registerHandlerAdapterIfNecessary(parserContext, source);
doParse(element, parserContext);
return null;
}
public abstract void doParse(Element element, ParserContext parserContext);
private void registerHandlerAdapterIfNecessary(ParserContext parserContext, Object source) {
if (!parserContext.getRegistry().containsBeanDefinition(HANDLER_ADAPTER_BEAN_NAME)) {
RootBeanDefinition handlerAdapterDef = new RootBeanDefinition(HttpRequestHandlerAdapter.class);
handlerAdapterDef.setSource(source);
handlerAdapterDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
parserContext.getRegistry().registerBeanDefinition(HANDLER_ADAPTER_BEAN_NAME, handlerAdapterDef);
parserContext.registerComponent(new BeanComponentDefinition(handlerAdapterDef, HANDLER_ADAPTER_BEAN_NAME));
}
}
}
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