org.springframework.integration.support.converter.DefaultDatatypeChannelMessageConverter Maven / Gradle / Ivy
/*
* Copyright 2014-2019 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
*
* https://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.integration.support.converter;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.integration.support.utils.IntegrationUtils;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.converter.MessageConverter;
import org.springframework.util.Assert;
/**
* Default message converter for datatype channels. Registered under bean name
* 'datatypeChannelMessageConverter'. Delegates to the 'integrationConversionService',
* if present.
*
* @author Gary Russell
* @since 4.0
*
*/
public class DefaultDatatypeChannelMessageConverter implements MessageConverter,
BeanFactoryAware {
private volatile ConversionService conversionService = DefaultConversionService.getSharedInstance();
private volatile boolean conversionServiceSet;
/**
* Specify the {@link ConversionService} to use when trying to convert to
* requested type. If this property is not set explicitly but
* the converter is managed within a context, it will attempt to locate a
* bean named "integrationConversionService" defined within that context.
*
* @param conversionService The conversion service.
*/
public void setConversionService(ConversionService conversionService) {
Assert.notNull(conversionService, "'conversionService' must not be null");
this.conversionService = conversionService;
this.conversionServiceSet = true;
}
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
if (!this.conversionServiceSet && beanFactory != null) {
ConversionService integrationConversionService = IntegrationUtils.getConversionService(beanFactory);
if (integrationConversionService != null) {
this.conversionService = integrationConversionService;
}
}
}
/**
* @return the converted payload or null if conversion is not possible.
*/
@Override
public Object fromMessage(Message message, Class targetClass) {
if (this.conversionService.canConvert(message.getPayload().getClass(), targetClass)) {
return this.conversionService.convert(message.getPayload(), targetClass);
}
else {
return null;
}
}
@Override
public Message toMessage(Object payload, MessageHeaders header) {
throw new UnsupportedOperationException("This converter does not support this method");
}
}