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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=18684

XPath extension mechanism enhancements





------- Additional Comments From [EMAIL PROTECTED]  2003-06-17 19:31 -------
>From xalan-users mail list you can tell that users are interested in this 
functionality and some user resort to using "more internal" approaches to 
resolve this problem, such as using 
org.apache.xpath.compiler.FunctionTable.installFunction, which, anyway, don't 
address all problems users want to address such as passing context inside of 
function implementation, etc.

Using XObject is definetely marginal approach, at least b/c it gives too broad 
access to the internal implementation. It should definitely be considered.
I decided to use it for the first draft, b/c I wanted to make possible for 
users to create variable param functions (not just with automatic params) and 
keep argument conversion flexible. It also is more coherent with Xalan-C 
extension rules, thus theoretically simplifying migration from one to another.
On the other hand I didn't want to overflood this functionality with the big 
set of new interfaces.

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