Hi Ni,
Ni Yue wrote:
> Hello,
>
> I am using Jersey to serve JSON response and met some issue. In my
> case, I used JAXB for XML marshalling and used Jersey's build-in
> function to map XML to JSON. And there're multiple namespaces in my
> XML schema, for example:
> *
> base.xsd:*
>
> <?xml version="1.0" encoding="UTF-8"?>
> <schema
> xmlns="http://www.w3.org/2001/XMLSchema"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:base="http://fruitbase.example.org"
> targetNamespace="http://fruitbase.example.org"
> elementFormDefault="qualified">
>
> <element name="fruits">
> <complexType>
> <sequence>
> <element name="fruit" type="base:Fruit"
> minOccurs="0"></element>
> </sequence>
> </complexType>
> </element>
>
> <complexType name="Fruit">
> <sequence>
> <element name="name" type="string"/>
> <element name="color" type="string"/>
> </sequence>
> </complexType>
> </schema>
>
>
> *fruits.xsd:*
>
> <?xml version="1.0" encoding="UTF-8"?>
> <schema
> xmlns="http://www.w3.org/2001/XMLSchema"
> xmlns:base="http://fruitbase.example.org"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:fruits="http://fruits.example.org"
> targetNamespace="http://fruits.example.org"
> elementFormDefault="qualified">
> <import namespace="http://fruitbase.example.org"
> schemaLocation="base.xsd"></import>
> <complexType name="Apple">
> <complexContent>
> <extension base="base:Fruit">
> <sequence>
> <element name="weight" type="int"></element>
> </sequence>
> <anyAttribute/>
> </extension>
> </complexContent>
> </complexType>
>
> <complexType name="Orange">
> <complexContent>
> <extension base="base:Fruit">
> </extension>
> </complexContent>
> </complexType>
> </schema>
>
>
> My question is:
> 1) In order to correctly marshall/unmarshall JSON request/response
> using Jersey and its client API, which JSON notation (mapped,
> mappedJettison, badgerFish, natual) should I use in this case (with
> multiple namespaces in schema)? It seems only mappedJettison notation
> can be used as I did a simple search in the mail list archive, but I
> am not sure.
It should be supported for both Jettison based notations (Jettison
mapped and BadgerFish),
where for the Badgerfish, the thing (namespace handling) should work out
of the box, without a need of any special
configuration, while when using the Jettison mapped notation, you would
need to explicitly
configure the namespace mapping (see
https://jersey.dev.java.net/documentation/1.1.0-ea/user-guide.html#d4e603
for details)
>
> 2) I implemented a JAXBContextResolver and tried mappedJettison notation:
>
> public JAXBContextResolver() throws Exception {
> Map<String, String> namespaceMap = new HashMap<String,
> String>();
> namespaceMap.put("http://www.w3.org/2001/XMLSchema", "xs");
>
> namespaceMap.put("http://www.w3.org/2001/XMLSchema-instance", "xsi");
> namespaceMap.put("http://fruitbase.example.org", "base");
> namespaceMap.put("http://fruits.example.org", "fruits");
> JSONConfiguration config =
> JSONConfiguration.mappedJettison().xml2JsonNs(namespaceMap).build();
> this.m_context = new JSONJAXBContext(
> config,
> m_types);
> }
>
> But in the JSON response, I found JAXB used a random prefix (ns2) for
> QName in attribute values:
>
> {"base.fruits":{"base.fruit":{"@xsi.type":"*ns2:Apple*","base.name <http://base.name>":"apple","base.color":"red","fruits.weight":2}}}
>
> Is it a bug for Jersey? I know it is possible to change that behavior
> via JAXB API (https://jaxb.dev.java.net/guide/Changing_prefixes.html),
> but it is wrapped by Jersey, and how can I control that in Jersey?
You would need to implement a JAXB NamespacePrefixMapper (see
http://blogs.sun.com/enterprisetechtips/resource/JAXBSample.java) and
hand it over to the actual Marshaller.
It is now not possible to do so out-of-the-box right now, but it is a
great idea to have such a feature in place.
Could you please file a feature request, so that i can work on this at
the after JavaOne timeframe?
Thanks,
~Jakub
>
> I attached a zipped maven project, which contains detailed
> implementation and test case for my issue. Thanks in advance for all
> your help.
>
> Environment:
> Jersey 1.0.3
> Java 1.5
>
> Regards,
> Ni Yue
>
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