@Override
	protected Class<?>[] supportedTargetTypes() {
		return new Class<?>[] { String.class };
	}
A {@link org.springframework.messaging.converter.MessageConverter}
to convert a Java object to a JSON String

@author David Turanski
@author David Liu
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/integration/bus/converter/PojoToJsonMessageConverter.java