JAXB to JSON using JACKSON

Question

In my application the JAXB output generates like:

this.marshalOut(jaxb_Object, fileOutputStream);

this is method call to the spring Object XML Mapping Marshallers that generate XML files. Now, I also like to generate JSON files after this line. Any one have idea about generating JSON output using JAXB input.

I found this example code online:

ObjectMapper mapper = new ObjectMapper();
AnnotationIntrospector introspector = new JacksonAnnotationIntrospector();
// make deserializer use JAXB annotations (only)
mapper.getDeserializationConfig().setAnnotationIntrospector(introspector);
// make serializer use JAXB annotations (only)
mapper.getSerializationConfig().setAnnotationIntrospector(introspector);
mapper.writeValue( outputStream, jaxb_object);

The setAnnotationIntrospector is deprecated, is there any other way of solving this problem?

Solution 1

The following works (and does not use any deprecated constructors) :

ObjectMapper mapper = new ObjectMapper();

AnnotationIntrospector introspector =
    new JaxbAnnotationIntrospector(mapper.getTypeFactory());   

mapper.setAnnotationIntrospector(introspector);

Specifically, this line

new JaxbAnnotationIntrospector(mapper.getTypeFactory());

uses a non-deprecated constructor. I've tested this and it successfully processes JAXB Annotations (such as @XmlTransient, in my case).

Solution 2

You can use jackson-module-jaxb-annotations as stated in the doc you can register a JaxbAnnotationModule module:

JaxbAnnotationModule module = new JaxbAnnotationModule();
// configure as necessary
objectMapper.registerModule(module);

Doing so you can now use both JAXB annotation and Jackson native annotation.

Solution 3

The correct solution for me was:

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setAnnotationIntrospector(new JaxbAnnotationIntrospector());

Solution 4

If you update Jackson to 2.0 it is not deprecated:

http://fasterxml.github.com/jackson-databind/javadoc/2.0.0/com/fasterxml/jackson/databind/ObjectMapper.html

You can see my configuration here (Spring):

Registrer MappingJackson2HttpMessageConverter in Spring 3.1.2 with JAXB annotations

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