/*
* Copyright 2002-2016 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 com.foo;
import java.util.List;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.ManagedList;
import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.xml.DomUtils;
import org.w3c.dom.Element;
public class ComponentBeanDefinitionParser extends AbstractBeanDefinitionParser {
@Override
protected AbstractBeanDefinition parseInternal(Element element,
ParserContext parserContext) {
return parseComponentElement(element);
}
private static AbstractBeanDefinition parseComponentElement(Element element) {
BeanDefinitionBuilder factory = BeanDefinitionBuilder
.rootBeanDefinition(ComponentFactoryBean.class);
factory.addPropertyValue("parent", parseComponent(element));
List<Element> childElements = DomUtils.getChildElementsByTagName(
element, "component");
if (childElements != null && childElements.size() > 0) {
parseChildComponents(childElements, factory);
}
return factory.getBeanDefinition();
}
private static BeanDefinition parseComponent(Element element) {
BeanDefinitionBuilder component = BeanDefinitionBuilder
.rootBeanDefinition(Component.class);
component.addPropertyValue("name", element.getAttribute("name"));
return component.getBeanDefinition();
}
private static void parseChildComponents(List<Element> childElements,
BeanDefinitionBuilder factory) {
ManagedList<BeanDefinition> children = new ManagedList<>(
childElements.size());
for (Element element : childElements) {
children.add(parseComponentElement(element));
}
factory.addPropertyValue("children", children);
}
}