Not sure whether this will help you.
http://jibx.sourceforge.net/tutorial/binding-custom.html
in this link you find the following information:
"Besides the two constructor variations shown in this example, you can
also define constructors that take an additional String parameter. If
the binding compiler finds a constructor of this type it will pass the
name of the object class that the marshaller/unmarshaller is used with
in the binding when calling the constructor. This feature can be used to
implement polymorphic marshaller/unmarshallers"
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jon
Little
Sent: 09 June 2008 03:45
To: Dennis Sosnoski
Cc: JiBX users
Subject: Re: [jibx-users] Struts, jibx and unmarshalling
Hi Dennis
Thanks for your reply.
I have taken your advice of having a single binding for all classes.
However, I still confused when it comes to unmarshalling.
The Struts XML Handler has:
public void toObject(Reader in, Object target)
The example on the JibX website gets a binding factory by passing in a
class name. In my situation when toObject is called I will have no idea
what class[es]/object[s] will be contained in the XML.
How can I getFactory in this situation?
Or is there one factory per binding file??
Cheers
Jon
Dennis Sosnoski wrote:
Hi Jon,
Just to clarify, the normal way of using JiBX would be to have a single
binding which includes <mapping> definitions for all the classes you're
going to be marshalling/unmarshalling as root objects.
If you really need to use a separate binding for each class you can make
that work, too, but it'll be more work to keep track of the various
bindings (which seemed to be what you were asking in your original
email). Is there a reason you want to do it this way?
- Dennis
Dennis M. Sosnoski
SOA and Web Services in Java
Training and Consulting
http://www.sosnoski.com - http://www.sosnoski.co.nz
Seattle, WA +1-425-939-0576 - Wellington, NZ +64-4-298-6117
Varghese C V wrote:
What i meant was to keep the binding factory as an instance
variable in
the xml handler, that is looked up during the initialization of
the xml
handler.
Does this clear things?
Jon Little wrote:
Hi
Thanks for your reply but I must admit the I do not
comprehend what
you mean.
Jon
Varghese C V wrote:
The BindingFactory need not be looked up every
time.
During the Xml Handler initialization look the
binding factory once
with a class that is part of the binding.
Looking up a binding factory from any class that
is part of the
binding definition would return the same binding
factory.
The binding factory is threadsafe.
Personally, I use spring to inject a binding
factory lookup class to
a xml handler.
Hope this helps
Varghese C V
Jon Little wrote:
Hi
I'm new to jibx but i love the concept.
I'm planning on using jibx for the xml
translator on struts.
Each class will have a binding,
The xml handler has two pre-defined
methods - fromObject and toObject.
The fromObject method is pretty
straightforward (and I hope the
toObject will be too):
public String fromObject(Object obj,
String resultCode, Writer out)
throws IOException
{
if (obj != null)
{
try
{
IBindingFactory bf =
BindingDirectory.getFactory(obj.getClass());
IMarshallingContext mc =
bf.createMarshallingContext();
mc.marshalDocument(obj, null,
null, out);
}
catch (JiBXException e)
{
// TODO Auto-generated catch
block
e.printStackTrace();
}
}
return null;
}
The toObject method has the following
signature:
public void toObject(Reader in, Object
target)
My question is given that each class
will have it's own binding and
I don't know the class of the object
that is about to be
unmarshalled how do I call
BindingDirectory.getFactory to get the
correct binding?
Thinking you in advance.
Jon
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