>
> Hi
>
> On Fri, Apr 8, 2011 at 5:08 AM, Simon Chen <[email protected]> wrote:
>
>> I guest my question should be how I should annotate non-containment
>> reference links...
>>
>> For example, an Order has a "Customer customer" member, when
>> converting an Order object to XML, I only want to have a something
>> like:
>> <order>
>> <name>holiday_purchase</name>
>> <customer>simon</customer>
>> </order>
>>
>> where "simon" is a unique identifier for a Customer object.
>>
>> How should I annotate "Customer getCustomer()" within the Order class?
>>
>>
> I'm not sure you can annotate a non-containment link in a way which will
> affect the serialization of the linked Customer.
>
> What happens if you have Customer itself annotated with a non-containment
> link ? Do you have some EMF reference embedded in this case ? Ideally, it
> would be nice if you could intercept/customize somehow the EMF serialization
> process. You can create a JAX-RS MessageBodyWriter which will use EMF to get
> to objects referenced by non-containment links and then serialize them with
> the help of JAXB or manually. Another option is to try to post-process the
> EMF output with some transformation, CXF may help there.
>
> Can you post few example, showing the current XML being produced and the
> one you'd like to be produced ?
>
> Thanks, Sergey
>
>
>> Thanks.
>> -Simon
>>
>> On Thu, Apr 7, 2011 at 12:36 PM, Sergey Beryozkin <[email protected]>
>> wrote:
>> >
>> >
>> > On Thu, Apr 7, 2011 at 5:28 PM, Simon Chen <[email protected]>
>> wrote:
>> >>
>> >> Can you elaborate (or post a link) on this one?
>> >>
>> >> I am actually modifying the genmodel code (javajetinc files), such
>> >> that genmodel would add @XmlRootElement tags automatically. The
>> >> downside is that I don't know if I added enough of them, or indeed
>> >> where I should add to...
>> >>
>> > I don't recall the details, may be David B can advise something :-)
>> >
>> > Cheers, Sergey
>> >
>> >>
>> >> Thanks a lot for your input. I will try them.
>> >>
>> >> -Simon
>> >>
>> >> On Thu, Apr 7, 2011 at 12:22 PM, Sergey Beryozkin <
>> [email protected]>
>> >> wrote:
>> >> > Actually, another option is to add a custom JAX-RS provider which
>> >> > handles
>> >> > Order/etc using the EMF itself (which will produce XMI - though it's
>> a
>> >> > complex XML indeed)
>> >> >
>> >> > Sergey
>> >> >
>> >> > On Thu, Apr 7, 2011 at 5:21 PM, Sergey Beryozkin <
>> [email protected]>
>> >> > wrote:
>> >> >>
>> >> >> Hi
>> >> >>
>> >> >> Please see comments inline
>> >> >>
>> >> >> On Thu, Apr 7, 2011 at 4:55 PM, Simon Chen <[email protected]>
>> >> >> wrote:
>> >> >>>
>> >> >>> I have some new findings...
>> >> >>>
>> >> >>> My class files are generated by EMF (ecore/genmodel).
>> >> >>
>> >> >> I guess it can help in time if CXF has an EMF binding or JAX-RS
>> >> >> provider
>> >> >>
>> >> >>>
>> >> >>> Thus, I have
>> >> >>> both Customer.class and CustomerImpl.class. The code is as simple
>> as:
>> >> >>>
>> >> >>> @XmlRootElement(name = "Customer")
>> >> >>> public class CustomerImpl implements Customer {
>> >> >>> private String name;
>> >> >>> private EList<Order> orders;
>> >> >>> public String getName() {
>> >> >>> return name;
>> >> >>> }
>> >> >>> public void setName(String name) {
>> >> >>> this.name = name;
>> >> >>> }
>> >> >>> public Order getOrder(String name) {
>> >> >>> // return the order with the specified name
>> >> >>> return null;
>> >> >>> }
>> >> >>> public void deleteOrder(String name) {
>> >> >>> // remove the order with the specified name
>> >> >>> }
>> >> >>> }
>> >> >>>
>> >> >>> @XmlRootElement(name = "Order")
>> >> >>> public class OrderImpl implements Order {
>> >> >>> private String name;
>> >> >>> private Customer customer;
>> >> >>> public String getName() {
>> >> >>> return name;
>> >> >>> }
>> >> >>> public void setName(String name) {
>> >> >>> this.name = name;
>> >> >>> }
>> >> >>> public Customer getCustomer() {
>> >> >>> return this.customer;
>> >> >>> }
>> >> >>> public void setCustomer(Customer c) {
>> >> >>> this.customer = c;
>> >> >>> }
>> >> >>> }
>> >> >>>
>> >> >>>
>> >> >>> The problem is that under "CustomerService" class, which contains a
>> >> >>> list of Customers and Orders, I have:
>> >> >>>
>> >> >>> @Path("/customerservice/')
>> >> >>> public class CustomerService {
>> >> >>> ...
>> >> >>> @POST
>> >> >>> @Path("/customers/")
>> >> >>> public Response addCustomer(Customer c) {
>> >> >>> ......
>> >> >>> }
>> >> >>> ....
>> >> >>> }
>> >> >>>
>> >> >>> In this case, if I post a CustomerImpl object to
>> >> >>> "/customerservice/customers/", I have the error of "No message body
>> >> >>> reader has been found for request class Customer". If I change the
>> >> >>> function definition to be as follows, it works...
>> >> >>> @POST
>> >> >>> @Path("/customers/")
>> >> >>> public Response addCustomer(CustomerImpl c) {
>> >> >>> ......
>> >> >>> }
>> >> >>>
>> >> >>> So, my first question is, is there a more elegant work-around such
>> >> >>> that "addCustomer" function would take "CustomerImpl" objects, even
>> >> >>> when the function parameter says "Customer c"?
>> >> >>>
>> >> >>> My second question is, let's say I want to post an "OrderImpl"
>> object
>> >> >>> to "/customerservice/orders", but the OrderImpl object contains a
>> >> >>> reference to a customer. What is the best way to transfer the
>> >> >>> reference relationship between the client and the server? For some
>> >> >>> reason, the direct XML marshaling would ignore the reference.
>> >> >>>
>> >> >>
>> >> >>
>> >> >> Looks like it does not work because Order and Customer interfaces,
>> >> >> presumably generated by EMF, have no @XmlRootElement annotations
>> >> >> themselves.
>> >> >>
>> >> >> Adding these annotations to concrete implementations is problematic,
>> as
>> >> >> you can add many components in EMF all the time. Some options to
>> >> >> consider:
>> >> >>
>> >> >> - I recall it is possible to add custom metadata to the EMF model.
>> Is
>> >> >> it
>> >> >> possible to have @XmlRootElement added to the generated interfaces ?
>> >> >> - Explicitly configure CXF JAXBElementProvider and set it to use
>> >> >> JAXBElement internally - that should handle types such as Customer
>> and
>> >> >> Order, see
>> >> >>
>> >> >>
>> http://cxf.apache.org/docs/jax-rs-data-bindings.html#JAX-RSDataBindings-HandlingJAXBbeanswithoutXmlRootElementannotations
>> >> >>
>> >> >> Hope that helps
>> >> >>
>> >> >> Sergey
>> >> >>
>> >> >>>
>> >> >>> Thanks.
>> >> >>> -Simon
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>> On Thu, Apr 7, 2011 at 7:56 AM, Sergey Beryozkin
>> >> >>> <[email protected]>
>> >> >>> wrote:
>> >> >>> > Hi Simon
>> >> >>> >
>> >> >>> > On Wed, Apr 6, 2011 at 10:59 PM, Simon Chen <
>> [email protected]>
>> >> >>> > wrote:
>> >> >>> >>
>> >> >>> >> Hi all,
>> >> >>> >>
>> >> >>> >> I am trying to build a RESTful web service... In short, I am
>> having
>> >> >>> >> trouble posting Java objects with member references from client
>> >> >>> >> side
>> >> >>> >> to server side.
>> >> >>> >>
>> >> >>> >> I have mostly followed the example under
>> >> >>> >> "apache-cxf-2.3.3/samples/jax_rs/basic". I have two major
>> problems
>> >> >>> >> now...
>> >> >>> >>
>> >> >>> >> 1) Handle objects with references. For example, a customer may
>> have
>> >> >>> >> a
>> >> >>> >> list of orders, and an order may be linked back to a customer.
>> So,
>> >> >>> >> how
>> >> >>> >> can I (or indeed what is the best way to) post an "Order" object
>> >> >>> >> with
>> >> >>> >> a link to a "Customer" object to "/customerservice/orders"?
>> >> >>> >>
>> >> >>> >> 2) The example uses annotations like "XmlRootElement" to enable
>> >> >>> >> sort
>> >> >>> >> of automated conversioning from java objects to XML/json data.
>> But
>> >> >>> >> this conversion seems to be broken when I add references into a
>> >> >>> >> class
>> >> >>> >> definition. For example, when I post an "Order" object to
>> >> >>> >> "/customerservice/orders", the server reports "No message body
>> >> >>> >> reader
>> >> >>> >> has been found for request class Order", (even though the
>> customer
>> >> >>> >> ref
>> >> >>> >> is set to null).
>> >> >>> >>
>> >> >>> >
>> >> >>> > Is that Order class also annotated ? Can you post some sample
>> >> >>> > structures
>> >> >>> > showing what exactly you'd like to do ?
>> >> >>> >
>> >> >>> > Thanks, Sergey
>> >> >>> >
>> >> >>> >>
>> >> >>> >> Thanks.
>> >> >>> >> -Simon
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>
>> >> >>
>> >> >>
>> >> >> --
>> >> >> Sergey Beryozkin
>> >> >>
>> >> >> Application Integration Division of Talend
>> >> >> http://sberyozkin.blogspot.com
>> >> >
>> >> >
>> >
>> >
>> >
>>
>
>
>
