[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XPath over DOM
> > > Are there any Java-based XSLT or XPath implementations (at > > least partial > > > functionality) that can traverse over existent DOM object, > > as opposed to > > > creating their own in-memory structure? I need to be able > > to provide my own > > > Document object built by my own parser, not just DOM APIs > > over internal > > > processor structure (as Saxon implementation). > > > I think Xalan and Oracle can both do this. > > > Why would any Java XSLT processor have a problem working with > > another's DOM nodes? > > Saxon doesn't do it (at present) because of the cost and complexity of (a) > sorting nodes into document order when they don't contain a serial number, I see the cost, but this should not exced cost of conversion. In abstract terms, it's a single tree traversal, with one assignment per node. Is there really any property of Java that would make this more expansive than a tree traversal with complete object instantiation and initialization per node? > (b) skipping over and counting nodes correctly in the presence of things > such as entity reference nodes, CDATA nodes, and unnormalized text nodes, > and There is a normalize() if the user doesn't mind mutation. The rest, at least as I've attacked it, is a matter of wrapping, again in the same pass as doc-order indexing. > (c) dealing with the multitude of ways that the DOM allows namespace > nodes to be (or not be) represented. ??? Do you mean Level 1 vs. Level 2? -- Uche Ogbuji Principal Consultant uche.ogbuji@xxxxxxxxxxxxxxx +1 303 583 9900 x 101 Fourthought, Inc. http://Fourthought.com 4735 East Walnut St, Ste. C, Boulder, CO 80301-2537, USA Software-engineering, knowledge-management, XML, CORBA, Linux, Python XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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