Storing application state as XML
Hi, I must admit I don't have the time to follow this list as diligently as I'd like, so it is possible that my questions have been answered already. I'll submit them nevertheless. :-) We have a rather complex application which stores its state using the standard MFC serialize stuff (well, actually a somewhat hacked version, but that's beside the point). Now, this limits our freedom in (or at least severely complicates) redesigning internal class structure while maintaining backwards file compatibility, and we've been pondering an XML format instead. There are of course other advantages, like accessing the information from other applications, or generating HTML and whatnot. The question is whether this, in general, is a good idea, and whether people have done this, and if so, to what degree of success, and by what methods. I can see two ways of doing this: 1) Use a DOM-based document, which can be passed around, much the way a CArchive class is, and modifying the Serialize() to fill in the relevant nodes in the document tree or 2) Encapsulating the document (DOM or otherwise) in a separate class, which traverses the application's classes and picks whatever information is relevant in whatever sequence it desires. The advantage of model 1 is a structure quite similar to what already exists, most of the code base could be left alone, I think. On the other hand, if our existing classes are well designed, all the relevant information should be accessible through the public: interfaces, and it should be easier to build the document in a flexible way. E.g. the placement of various information might not be obvious from the class' perspective. So, before we jump the gun, I'd like to hear from people who have done this, and are willing to share their experiences, or otherwise contribute suggestions and ideas. Thanks for listening, -kzm -- If I haven't seen further, it is by standing in the footprints of giants xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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