/*
* 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.convert;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.context.support.ConversionServiceFactoryBean;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.yarn.integration.support.IntegrationContextUtils;
/**
* Post processor which automatically creates an instance
* of conversion service if it doesn't exists.
*
* @author Oleg Zhurakousky
* @author Mark Fisher
* @author Janne Valkealahti
*
*/
public class ConversionServiceCreator implements BeanFactoryPostProcessor {
private final Log logger = LogFactory.getLog(this.getClass());
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
if (!beanFactory.containsBean(IntegrationContextUtils.YARN_INTEGRATION_CONVERSION_SERVICE_BEAN_NAME)) {
if (beanFactory instanceof BeanDefinitionRegistry) {
BeanDefinitionBuilder conversionServiceBuilder =
BeanDefinitionBuilder.rootBeanDefinition(CustomConversionServiceFactoryBean.class);
BeanDefinitionHolder beanDefinitionHolder = new BeanDefinitionHolder(
conversionServiceBuilder.getBeanDefinition(),
IntegrationContextUtils.YARN_INTEGRATION_CONVERSION_SERVICE_BEAN_NAME);
BeanDefinitionReaderUtils.registerBeanDefinition(beanDefinitionHolder, (BeanDefinitionRegistry) beanFactory);
}
else if (logger.isWarnEnabled()) {
logger.warn("BeanFactory is not a BeanDefinitionRegistry implementation. Cannot register a default ConversionService.");
}
}
}
/**
* This is a workaround until we depend on Spring 3.1 and specifically when SPR-8818 is resolved.
*/
static class CustomConversionServiceFactoryBean extends ConversionServiceFactoryBean {
@Override
public ConversionService getObject() {
ConversionService service = super.getObject();
if (service instanceof GenericConversionService) {
((GenericConversionService) service).removeConvertible(Object.class, Object.class);
}
return service;
}
}
}