Re: [saxon] integrated extension arguments
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From: Michael Kay <mike@sa...> - 2011-03-19 08:50:42
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On 18/03/2011 17:05, Merrilees, David wrote: > > Thanks Michael > > Looking at some examples on the web, It looks like the Unwrap method > returns an instance of net.sf.saxon.om.ValueRepresentation, instead of > net.sf.saxon.dotnet.DotNetObjectValue, and doesn’t have a GetObject > method. > Unwrap will return whatever value has been wrapped, which in this case will be a DotNetObjectValue - you can cast the result and then call getObject() - note the lower-case "g" because this is a Java method that's being called. > > I’m also confused about how you would declare the argumentType for an > object passed from XSL to Saxon. Which XdmItemType would this use? > I think you probably have to use the most generic ItemType, that is XdmAnyItemType.Instance. Michael Kay Saxonica > Thanks > > David > > > > Hi > > Is it possible to pass an object to an integrated extension > function, which has been passed as a parameter using > XdmAtomicValue.WrapExternalObject? Looking at the Saxon > documentation, this doesn't seem possible as the types which > integrated extensions can accept seem limited. > > Thanks > > David > > Just in case anyone else is confused (I spent a minute or two > scratching > my head), we're talking about the .NET API here. > > I think you can use an XdmAtomicValue that was constructed using > > XdmAtomicValue.WrapExternalObject > > in the same way as any other XdmAtomicValue. Presumably the issue is, > within the body of your ExtensionFunctionCall, how do you get the > external object back from the IXdmEnumerator that's supplied to > the call? > > It's a little clumsy, but I think it can be done. > > First you call MoveNext() and Current() on the IXdmEnumerator, and > cast > the result to XdmAtomicValue. Then the Unwrap method (inherited from > XdmValue) returns an instance of > net.sf.saxon.dotnet.DotNetObjectValue. > (To refer to this, you'll need to add a reference to the underlying > Saxon DLL). This extends net.sf.saxon.value.ObjectValue, which has a > method getObject, which should return you the object you started with. > > I'll add a tweak so XdmAtomicValue.Value does the right thing. > > Michael Kay > Saxonica > > ------------------------------------------------------------------------------ > Colocation vs. Managed Hosting > A question and answer guide to determining the best fit > for your organization - today and in the future. > http://p.sf.net/sfu/internap-sfd2d > _______________________________________________ > saxon-help mailing list archived at http://saxon.markmail.org/ > saxon-help@... > <mailto:saxon-help@...> > https://lists.sourceforge.net/lists/listinfo/saxon-help > > > ------------------------------------------------------------------------ > This is a confidential email. Tesco may monitor and record all emails. > The views expressed in this email are those of the sender and not Tesco. > > Tesco Stores Limited > Company Number: 519500 > Registered in England > Registered Office: Tesco House, Delamare Road, Cheshunt, Hertfordshire > EN8 9SL > VAT Registration Number: GB 220 4302 31 > > > ------------------------------------------------------------------------------ > Colocation vs. Managed Hosting > A question and answer guide to determining the best fit > for your organization - today and in the future. > http://p.sf.net/sfu/internap-sfd2d > > > _______________________________________________ > saxon-help mailing list archived at http://saxon.markmail.org/ > saxon-help@... > https://lists.sourceforge.net/lists/listinfo/saxon-help |