Re: [xsl] How to retrieve global parameters names and their default values using Saxon?

["andrew welch" <andrew.j.welch@xxxxxxxxx>]

On 5/8/06, Abel Braaksma Online <abel.online@xxxxxxxxx> wrote:
> Dear subscribers,
>
> I am a first timer to this list, so I hope to do it a bit right.
>
> We are building a templating system where different data formats can be
> imported/exported in different other formats, multiple in/multiple out.
> We use XSLT 2.0 as our format definition language, describing either the
> input or the export format in it, using a middle format for our storage
> system where people can edit the contents in a transparent and user
> friendly interface.
>
> To add to the achieved flexibility, tech-users can add there own
> import/export definitions using one or more XSLT files. When normal
> users use some import wizard, we want to present them the global
> parameters to override some default settings, like "cell-delimiter",
> "ignore-headers" etc, that were defined in the uploaded XSLT files using
> (root level) <xsl:param ...>
>
> Question: How can this be achieved? Saxon provides a getParameter and a
> setParameter. But "getParameter" will not return the default value, and
> it is not possible to iterate through all available global parameters
> without knowing their names.
>
> I have looked up the uses of the ParameterSet class, but could not find
> a way to get this scenario to work. One alternative could be to use XSLT
> (!) to retrieve all parameters by transforming the original XSLT(s), but
> how to deal with includes, imports and precedence?
>
> My guess was: if there's a getParameter(), there is somewhere a
> getParameters() also. But there isn't, at least I couldn't find it. If
> anyone has an idea or a pointer, I would be very greatful!

Use:

compiledStylesheet = stf.newTemplates(new StreamSource(stylesheetPath));
 Executable exec = ((PreparedStylesheet)compiledStylesheet).getExecutable();
 IntHashMap map = exec.getCompiledGlobalVariables();
 Iterator iter = map.valueIterator();
 while (iter.hasNext()) {
   Object var = iter.next();
   if (var instanceof GlobalParam) {
     String name = ((GlobalParam)var).getVariableName();
     String value = ((GlobalParam)var).getSelectExpression().toString();

cheers
andrew