Re: [Simple-support] Beginner Question

[Graham S. <gr...@mo...>]

On Tue, Jun 10, 2008 at 3:59 PM, Timo Rumland <cr...@ol...> wrote:
> Hello Graham,
>
>> But if I omit the class attribute then this:
>
>> TaskInterface o = serializer.read(TaskInterface.class, "<task1
>> a=\"14\" b=\"13\"/>>");
>> will fail with
>
> you want to get a TaskInterface, which is apparently an interface,
> returned by the serializer. This is possible only if the serializer
> knows what implementation to instantiate. If you have no "class"
> parameter in the XML, how can the serializer know which class to
> instantiate (you can't instantiate an interface)?

Right, i entirely expect to have to provide the class attribute when
i'm deserializing to an interface.

How do i get the serializer to put it there?

If i have

TaskInterface myTask = new Task1(14,13);
myPersister.write(myTask, "output.xml");

then it writes out the xml without the class attribute, so I end up with:

<task1 a="14" b="13"/>

instead of what I really want, which is:

<task1 class="com.company.om.tasks.Task1" a="14" b="13"/>


Does that make sense?
How do I get Persister.write() to include the class attribute?


thanks again,
Graham