Dennis, this is currently a research/hack effort. let's see what info we can extract and then we can decide what to do next. worst case, no mtom if you use databinding...
thanks, dims On 9/1/05, Dennis Sosnoski <[EMAIL PROTECTED]> wrote: > I may be misunderstanding how XMLBeans works, but I don't see any way > it's possible to add MTOM support without the data binding framework > being aware of it. In the XMLBeans case I'd think that the underlying > XML store would also need to be extended - otherwise it seems like > XMLBeans would insist on storing the data as base64 encoding, and would > also expect the data in that form on input and supply the data in that > form on output. > > That's one of the drawback to the layering violations built into the > whole MTOM approach. See the earlier thread discussing this: > http://marc.theaimsgroup.com/?t=112131750700001&r=1&w=2 > > - Dennis > > Davanum Srinivas wrote: > > >Ajith, > > > >Could you walk the schema stuff as mentioned here: > >http://mail-archives.apache.org/mod_mbox/xmlbeans-dev/200508.mbox/[EMAIL > >PROTECTED] > > > >"The way I would do it is: compile the schemas using the API > >(XmlBeans.compileXmlBeans()) instead of using "scomp", get a > >SchemaTypeSystem back and call .globalElements() and .globalTypes() on > >it." > > > >If we can extract enough info from the SchemaTypeSystem, we can store > >it somehow and use it when we have to do MTOM. > > > >thanks, > >dims > > > >On 9/1/05, Ajith Ranabahu <[EMAIL PROTECTED]> wrote: > > > > > >>Hi all, > >> As most of you know already XML Beans is used as one of the databinding > >>frameworks for Axis2. Although it was planned to add multiple framework > >>support, most of the work has been done only for XMLBeans and I guess it is > >>the practically usable one at the moment. However when integrating MTOM with > >>databinding we have slight problems. > >> > >> 1. Use of the Xmime schema extension. have a look at the following piece of > >>schema. (this is from > >>http://www.w3.org/TR/xml-media-types/) > >> <?xml version="1.0" ?> > >><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; > >> xmlns:tns=" > >>http://example.com/know-type"; > >> xmlns:xmime="http://www.w3.org/2005/05/xmlmime"; > >> targetNamespace=" > >>http://example.com/know-type";> > >> <xs:import namespace="http://www.w3.org/2005/05/xmlmime"; > >> schemaLocation=" > >>http://www.w3.org/2005/05/xmlmime"/> > >> <xs:element name="JPEGPicture" type="xmime:base64Binary" > >> xmime:expectedContentTypes="image/jpeg" /> > >></xs:schema> > >> > >> The xmime:expectedContentTypes attribute is the key here. As you can see > >>this attribute says what is the expected type of the binary content. The > >>right thing to do in the above case would be to generate the databind object > >>and have it return an image object as the result of data binding depending > >>on the expected content type. I'm not sure how much work has been done with > >>XMLBeans (or any of the other databinding frameworks for that matter) > >>regarding this but if the databinding framework is unaware of this, it > >>seriously limits our ability to handle MTOM with databinding! > >> > >> 2. Optimizing given text elements.Currently the code generated stubs can > >>work with byte arrays but sending content in optimized form is the problem. > >>XMLBeans is the one who sees that particular objects are base64 binary > >>(which can be optimized) but this information is burnt into the XMLBeans > >>generated classes and there's no way to propogate it to the OM tree (at > >>least I don't see a way yet). Hence when writing to the wire, we have no way > >>of saying which character items to optimize. We can do a global optimization > >>(all text nodes are optimized!) but i' m not sure whether that'll work at > >>all since optimization assumes the content to be bas64 encoded (in which > >>case it tries to decode!) > >> > >> Any thoughts on how to deal with these problems ? > >> > >> BTW I've cc'ed this to the XMLBeans list as well, perhaps the XBeans gurus > >>can shed some light on this issue :) > >> > >>-- > >>Ajith Ranabahu > >> > >> > > > > > > > > > -- Davanum Srinivas : http://wso2.com/ - Oxygenating The Web Service Platform --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
