I do not understand the part where you say "there is no way to know what types are available for casting at the time the code is written". If that is true, how will you write code to do something constructive with these types?
If this code is to be written in the future, then let that future author do the casting --s/he will know the type. -Sam -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 22, 2007 8:02 PM To: [email protected] Subject: RE: XmlBeans processing - brick wall Apologies for my confusing attempts at communicating my situation, but thanks for your reply. You say I must know about MyKnownDocument in order to make the cast described below, but I was wanting to dynamically derive MyKnownDocument from MyKnownDocumentImpl such that I can then make the cast from one to the other. This is because a) I cannot use xxxDocumentImpl for the next step in my processing, but rather the Interface type xxxDocument itself, and b) there is no way to know what types are available for the casting at the time the code is written. But it sounds like this is not possible. I suppose I can go through the contents of the jar file created from scomp and do a comparison of Classes/ types until I find a match ('instanceof' ) for xobj then do the cast. Any other suggestions are welcome, thanks again. aj -------------- Original message ---------------------- > - if the root element of your document is "known" by XmlBeans, the the > returned XmlObject is of the correct instance class, you don't need to > do anything else: xobj.getClass() should return > MyKnownDocumentImpl.class > - you can find out which document SchemaType it is by doing > "xobj.schemaType()" > > Beyond this, in Java in general, if you want to write a cast like > "(MyKnownDocument) xobj" then you must of course know at the time you > write your code about MyKnownDocument... > > Radu > > ________________________________ > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Tuesday, May 22, 2007 2:10 PM > To: [email protected] > Subject: XmlBeans processing - brick wall > > > I will rephrase my earlier question as it may have been a bit much: > > > I have seen this... > > XmlObject xobj = XmlObject.Factory.parse(myDocument); > > if (xobj instanceof MyKnownDocument ) { > > MyKnownDocument mydoc = (MyKnownDocument )xobj; > > if (!xobj.validate()) > System.out.println("Not a valid my-order document"); } > > ...which is fine if you have knowledge of MyKnownDocument to begin with. > If you do not know it, is it possible to extract the document type > associated with myDocument/xobj, and then cast xobj to that? The > myDocument is an instance of _some_ kind of Document, I just need to > find out _which_ Document, then cast it similar to the above so I can > then pass xobj along for further processing. > > Are there examples of this? > > Thanks, > > AJ > > Notice: This email message, together with any attachments, may > contain information of BEA Systems, Inc., its subsidiaries and > affiliated entities, that may be confidential, proprietary, > copyrighted and/or legally privileged, and is intended solely for the > use of the individual or entity named in this message. If you are not > the intended recipient, and have received this message in error, please immediately return this by email and then delete it. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
