Smalltalk - [VW] marshaling/unmarshaling XML to Smalltalk

Author

[VW] marshaling/unmarshaling XML to Smalltalk

Joachim Tuchel

2004-10-20, 4:07 pm

Hi there,

I am trying to marshal/unmarshal xml-Smalltalk using the
XMLObjectBinding and XMLObjectMarshalingManager stuff. The documentation
is quite poor on this or I am too blind/stupid/ignorant...

Here's what I do:
| object xmlStream |
object := MyClassToBeMapped new.
xmlStream := '<xmlToSmalltalkBinding name=...' readStream.
WebServices.XMLObjectBinding loadFrom: xmlStream.

"Everything seems to be alright up to here... An INspect shows me an
XMLObjectBinding with the marshaler in it. The classname is spelled
correctly"

XMLObjectMarshalingManager new marshal: object.

Well, this last one doesn't work at all. It cant find a marshaler which
is responsible for MyClassToBeMapped. (Message notUnderstood:
#mashalerForObject:ifAbsent:)
the instVar #regeisteredObjects of the XMLObjectMarshalingManager is an
empty Identity Dictionary.

I certainly missed the place in the docs where they tell me how to
register my marshaler in at the MarshalinManager. It is not the
loadFrom: alone as stated in the docs...

please help...

Joachim

Volker Zink

2004-10-21, 8:57 am

There may be several reasons. But your code sniplet suggests that you
create the MarshalingManager the wrong way. Try this:

theBinding := WebServices.XMLObjectBinding bindingAtNamespace:
'myNamespace'.
theMarshalManager := WebServices.XMLObjectMarshalingManager on: theBinding.
theMarshalManager marshal: anObject.

Hope this helps.

Volker

Joachim Tuchel wrote:
> Hi there,
>
> I am trying to marshal/unmarshal xml-Smalltalk using the
> XMLObjectBinding and XMLObjectMarshalingManager stuff. The documentation
> is quite poor on this or I am too blind/stupid/ignorant...
>
> Here's what I do:
> | object xmlStream |
> object := MyClassToBeMapped new.
> xmlStream := '<xmlToSmalltalkBinding name=...' readStream.
> WebServices.XMLObjectBinding loadFrom: xmlStream.
>
> "Everything seems to be alright up to here... An INspect shows me an
> XMLObjectBinding with the marshaler in it. The classname is spelled
> correctly"
>
> XMLObjectMarshalingManager new marshal: object.
>
> Well, this last one doesn't work at all. It cant find a marshaler which
> is responsible for MyClassToBeMapped. (Message notUnderstood:
> #mashalerForObject:ifAbsent:)
> the instVar #regeisteredObjects of the XMLObjectMarshalingManager is an
> empty Identity Dictionary.
>
> I certainly missed the place in the docs where they tell me how to
> register my marshaler in at the MarshalinManager. It is not the
> loadFrom: alone as stated in the docs...
>
> please help...
>
> Joachim
>

Joachim Tuchel

2004-10-21, 4:05 pm

Volker,

thanx for answering.

Volker Zink wrote:

> There may be several reasons. But your code sniplet suggests that you
> create the MarshalingManager the wrong way. Try this:

I thought I was doing exactly what the Web Services Guide says. Which,
btw, needs work.
>
> theBinding := WebServices.XMLObjectBinding bindingAtNamespace:
> 'myNamespace'.

Okay, now we have a Smalltalk Namespace and a couple of XML Namespaces.
Do I pick just another one or does it have to match one of the others?

> theMarshalManager := WebServices.XMLObjectMarshalingManager on:
> theBinding.
> theMarshalManager marshal: anObject.
>
I' ll give it a try. thanx

Joachim

[color=darkred]
> Hope this helps.
>
> Volker
>
> Joachim Tuchel wrote:
>

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