I have some new findings...
My class files are generated by EMF (ecore/genmodel). 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.
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
>
>
>
