Re: Ikvmstub support for introducing generic signatures

Hi,

I've thought about this a lot and I've not been able to come up with a way to do this automatically that doesn't suffer from lots of complications.

The easiest solution is to write a C# facade that provides a .NET friendly interface.

Regards,
Jeroen

From: John Park [mailto:[email protected]]
Sent: Wednesday, December 11, 2013 22:28
To: [email protected]
Subject: [Ikvm-developers] Ikvmstub support for introducing generic signatures

Hi there,

I'm currently writing a C# library (a SDK) that can be used by Java code for interoperability between the Java code, that is to be compiled to a .dll file using ikvmc, and a larger .NET project. As of now, I am using java.util libraries for methods/properties within the C# SDK using IKVM.OpenJDK.Core.dll that can be called on Java side, e.g.

using System;
...

namespace SomeNamespace
{
    public class SomeCSharpLibraryClass
    {
        ...

        public static java.lang.List GetSomeList()
        {
            ...
            return ....
        }

        public static java.lang.Map GetSomeMap()
        {
            ...
            return ...
        }

...

My understanding is that Java removes generics during runtime, which is fine with me. However, would it be possible when the C# library is compiled to introduce generic signatures into the methods into stub .class files? So using the above examples again, instead of having

import SomeNamespace.*;
...

List someList = SomeCSharpLibraryClass.GetSomeList();
Map someMap = SomeCSharpLibraryClass.GetSomeMap();

on the Java side, is it possible to have something like

List<String> someList = SomeCSharpLibraryClass.GetSomeList();
Map<String, Integer> someMap = SomeCSharpLibraryClass.GetSomeMap();

by introducing the generic signatures String and (String, Integer) to the two methods in the .class file after the C# library's been compiled using ikvmstub? Otherwise, if there is no such option, what other alternatives are there to achieve the same functionality? Since this C# library will be used by others, using C# generic classes (e.g. IEnumerable<string>, IDictionary<string, string>), which generates lengthy explicit class name, is not really preferable.

Thank you for your time.

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