Re: [Ikvm-developers] Regarding VS2010 and IKVM

[Jeroen F. <je...@su...>]

Hi Eugene,

I see what you mean now. It does indeed appear impossible to target .NET 2.0 with VS 2010 and use IKVM, unfortunately.
 
Regards,
Jeroen

> -----Original Message-----
> From: Дейзи Чейн [mailto:dai...@ma...]
> Sent: Sunday, February 28, 2010 3:28 PM
> To: ikv...@li...
> Subject: [Ikvm-developers] Regarding VS2010 and IKVM
> 
> Hello Jeroen, thanks for prompt your answer,
> 
> >I get a warning when adding the reference and while building, but it
> builds just fine.
> >BTW, this is because IKVM.OpenJDK.Core has a couple of extention
> methods and references System.Core.dll, Visual Studio assumes that an
> assembly that references System.Core.dll requires .NET 3.5, but that's
> a wrong assumption, IKVM 0.42 works and is supported on .NET 2.0 SP1
> and higher.
> 
> Here is my experience: I can link to VS .NET 2.0 project any dll
> written and/or cross-compiled by myself, but VS doesn't see namespaces
> (packages) that are inside IKVM/JDK (of course, I added them as
> references and dependencies - mybe, I missed something?).
> 
> Let's use calling saxon Transformer as an illustrative synthetic
> example:
> 
> public static byte[] transform(byte[] xmlfile, byte[] xslfile)
>         {
> //----here we call Java core classes to prepare arguments for saxon's
> transformer.transform() call //----such way of calling saxon is used to
> demonstrate the nature of problem
> 
>             StreamSource xml = new StreamSource(new
> ByteArrayInputStream(xmlfile));
>             StreamSource xsl = new StreamSource(new
> ByteArrayInputStream(xslfile));
> 
> java.lang.System.setProperty("javax.xml.transform.TransformerFactory",
>                 "net.sf.saxon.TransformerFactoryImpl");
>             StreamResult outResult = new StreamResult();
>             java.io.ByteArrayOutputStream outputXmlResult = new
> java.io.ByteArrayOutputStream();
>             outResult.setOutputStream(outputXmlResult);
> 
>             TransformerFactory trans = new
> net.sf.saxon.TransformerFactoryImpl();
>             Transformer transformer = trans.newTransformer(Xsl);
>             transformer.setParameter("dir", "output");
>             transformer.transform(Xml, outResult);
>             return outputXmlResult.toByteArray();
>         }
> 
> In this example, VS2010 will see and understand the namespace
> net.sf.saxon, but will say "The type or namespace name 'javax' could
> not be found (are you missing a using directive or an assembly
> reference?)" - and so on for any Java class (StreamSource,
> ByteArrayInputStream and so on).
> 
> Of course, a simple workaround is possible: make all wrapper classes in
> Java with primitive argument/result types, so only "your own" packages
> will be in "using" C# clause (in this synthetic example - we can make
> wrapper in Java with method transform(byte[] xmlfile, byte[] xslfile)
> and call it from C# code).
> In 2008 this example compiles fine.
> Eugene
> 
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