/*
* Copyright 2013 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.yarn.integration.config;
import org.w3c.dom.Element;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.parsing.BeanComponentDefinition;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
import org.springframework.beans.factory.support.ManagedSet;
import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.yarn.config.YarnNamespaceUtils;
/**
* Simple namespace parser for <yarn-int:converter>.
*
* @author Oleg Zhurakousky
* @author Mark Fisher
* @author Janne Valkealahti
*
*/
public class IntegrationConverterParser extends AbstractBeanDefinitionParser {
private final ManagedSet<Object> converters = new ManagedSet<Object>();
private volatile boolean initialized;
private final Object initializationMonitor = new Object();
@Override
protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
this.initializeConversionServiceInfrastructureIfNecessary(parserContext);
BeanComponentDefinition converterDefinition = YarnNamespaceUtils.parseInnerHandlerDefinition(element,
parserContext);
if (converterDefinition != null) {
this.converters.add(converterDefinition);
} else {
String beanName = element.getAttribute("ref");
Assert.isTrue(StringUtils.hasText(beanName),
"Either a 'ref' attribute pointing to a Converter or a <bean> sub-element defining a Converter is required.");
this.converters.add(new RuntimeBeanReference(beanName));
}
return null;
}
private void initializeConversionServiceInfrastructureIfNecessary(ParserContext parserContext) {
synchronized (this.initializationMonitor) {
if (!this.initialized) {
String contextPackage = "org.springframework.yarn.integration.convert.";
BeanDefinitionBuilder creatorBuilder = BeanDefinitionBuilder.rootBeanDefinition(contextPackage
+ "ConversionServiceCreator");
BeanDefinitionReaderUtils.registerWithGeneratedName(creatorBuilder.getBeanDefinition(),
parserContext.getRegistry());
BeanDefinitionBuilder conversionServiceBuilder = BeanDefinitionBuilder
.rootBeanDefinition(contextPackage + "ConverterRegistrar");
conversionServiceBuilder.addConstructorArgValue(converters);
BeanDefinitionReaderUtils.registerWithGeneratedName(conversionServiceBuilder.getBeanDefinition(),
parserContext.getRegistry());
this.initialized = true;
}
}
}
}