/*
* Copyright 2014 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.xd.dirt.integration.bus.converter;
import org.springframework.messaging.Message;
import org.springframework.util.MimeTypeUtils;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
/**
* A {@link org.springframework.messaging.converter.MessageConverter}
* to convert a Java object to a JSON String
*
* @author David Turanski
*/
public class PojoToJsonMessageConverter extends AbstractFromMessageConverter {
private final ObjectMapper mapper = new ObjectMapper();
public PojoToJsonMessageConverter() {
super(MimeTypeUtils.APPLICATION_JSON);
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
}
@Override
protected Class<?>[] supportedTargetTypes() {
return new Class<?>[] { String.class };
}
@Override
protected Class<?>[] supportedPayloadTypes() {
return null;
}
@Override
public Object convertFromInternal(Message<?> message, Class<?> targetClass) {
Object result = null;
try {
result = mapper.writeValueAsString(message.getPayload());
}
catch (JsonProcessingException e) {
logger.error(e.getMessage(), e);
return null;
}
return buildConvertedMessage(result, message.getHeaders(), MimeTypeUtils.APPLICATION_JSON);
}
}