thanks for the reply Sergey, i had look into that but i am not able to
understand much
I tried
public class InputStreamProvider implements MessageBodyReader {
public boolean isReadable(Class<?> arg0, Type arg1, Annotation[] arg2,
MediaType arg3) {
System.out.println("hello");
return
InputStream.class.isAssignableFrom(XmlRootElement.class);
}
public Object readFrom(Class arg0, Type arg1, Annotation[] arg2,
MediaType arg3, MultivaluedMap<String, String> arg4,
InputStream is) throws IOException,
WebApplicationException {...}
& i configure this provider in beans.xml but readfrom method is not
executing.
I think this provider should directly invoked.
should i need to do anything in my rest service? means the method
@GET
@Produces("application/json")
@Consumes("application/json")
@Path("/users/json")
public Flights getFlightListAsJson() {
return getFlights();
}
need to change? Can please u provide some sample code for any example in
which able to get output with callback function?
Sergey Beryozkin wrote:
>
> Hi
>
> Have a look please here :
> http://cwiki.apache.org/CXF20DOC/jax-rs-jsr-311.html
>
> There's a section there dedicated to filters and interceptors and I hope
> you'll find some 'recipe' there.
> Most likely doing a CXF JAXRS ResponseFilter or customizing a default
> JSONProvider (perhaps by extending it and just overriding writeTo(),
> possibly still delegating to the superclass but writing the callback first
> into your custom OutputStream buffer) should do the trick...
>
> Cheers, Sergey
>
>
> shwetanaik wrote:
>>
>> hi wildPengiun
>>
>> can u plz explain more what u did to alter json output in rest service
>>
>> I am, using jaxrs I also want to alter json output by adding callback
>> function
>>
>> please can provide some sample code
>>
>> suppose my rest service is
>>
>> @GET
>> @Produces("application/json")
>> @Consumes("application/json")
>> @Path("/users/json")
>> public Flights getFlightListAsJson() {
>> return getFlights();
>> }
>>
>> & i get ouput
>> {"flights":{"flight":[{"@flightId":"OK123","company":"Czech
>> Airlines","number":123,"aircraft":"B737"},{"@flightId":"OK124","company":"Czech
>> Airlines","number":124,"aircraft":"AB115"}]}}
>>
>> but i wanted to do output like
>> getflight({"flights":{"flight":[{"@flightId":"OK123","company":"Czech
>> Airlines","number":123,"aircraft":"B737"},{"@flightId":"OK124","company":"Czech
>> Airlines","number":124,"aircraft":"AB115"}]}})
>>
>> how can write this getflight string in response using jaxrs.
>>
>>
>>
>> wildPengiun wrote:
>>>
>>> Thanks for that Sergey, but I've had a success with my REST
>>> outInterceptors. Instead of using an annotation on the service class
>>> I've added it to the beans.xml and now its burst into life. Now I can
>>> see the content-type is JSON hoorah.
>>>
>>> Next problem is how to change the message ?? any clues
>>>
>>> Thanks for all the help.
>>>
>>>
>>>
>>> Sergey Beryozkin-3 wrote:
>>>>
>>>> Hi
>>>>
>>>>>
>>>>> I'm trying to alter some output in a REST call. I want to wrap the
>>>>> JSON
>>>>> output with a callback name. I've managed to get a filter to work (all
>>>>> my
>>>>> attempts to get the OutInterceptor to work have failed). So now I've
>>>>> got a
>>>>> message object.
>>>>>
>>>>> To alter the message I thought I could use something like JSONStream
>>>>> os =
>>>>> message.getContent(JSONStream.class); but this returns null. Anyone
>>>>> have an
>>>>> idea how I can alter the JSON.
>>>>
>>>> JAXRS Output filters are invoked immediately after the invocation has
>>>> returned but before a given method response has been
>>>> serialized into the output message.
>>>>
>>>> So I think what you need to do in your response handler is to replace
>>>> the actual OutputStream.class with a buffered/filter one,
>>>> wrapping the original one.
>>>>
>>>> What will happen next is that a JSONProvider will write into this
>>>> stream and I guess at this moment you can transfrom the incoming
>>>> output bytes.
>>>>
>>>> It's basically doing same thing you can do with Servlet filters.
>>>>
>>>> Default JSONProvider does not append a JSONStream.class.
>>>>
>>>> As such another option is actually write a custom JSON
>>>> MessageVBodyWriter, possibly either extending the default one or simple
>>>> copying its code and updating its wtiteTo() method to do a pre-request
>>>> specific JSON or something like that.
>>>> Providers can have @Contexts like UriInfo, etc, injected so one can get
>>>> some additional info from there.
>>>>
>>>> Does it make sense or am I missing the point ?
>>>>
>>>> Cheers, Sergey
>>>>
>>>>> --
>>>>> View this message in context:
>>>>> http://www.nabble.com/Altering-JSON-Output-in-a-REST-service-tp20478852p20478852.html
>>>>> Sent from the cxf-user mailing list archive at Nabble.com.
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>>
>>
>
>
--
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