Hi Joseph,
On Wed, Mar 3, 2010 at 8:56 PM, Joseph Athman <jjath...@gmail.com> wrote:
> Thanks, this has been helpful. What would be a good class to look at for
> how FFI works in JRuby?
Take a look at lib\ruby\1.8\Win32API.rb
Also, there are samples\ffi.
> Also, does it matter that none of the win32 stuff
> should work on a non-windows platform?
Nope. This is clearly a windows-specific library.
> Does that impact the decision to use
> FFI or not?
Nope.
> It seems like with MRI you can't even require it, so it must
> not be distributed with MRI on non-windows platforms.
For Win32API.rb, we have right at the top:
raise LoadError.new("Win32API only supported on win32") unless
Config::CONFIG['host_os'] =~ /mswin/
So, it will only work on Windows and raise LoadError on other platforms.
Thanks,
--Vladimir
> On Wed, Mar 3, 2010 at 12:30 PM, Thomas E Enebo <tom.en...@gmail.com> wrote:
>>
>> Joseph, the Jira issue is pretty old and it actually predates ffi as
>> a technology. If you don't start helping Brian in his impl, then
>> consider trying to do it all via ffi.
>>
>> perhaps moot now...
>>
>> In answer to your original question, ThreadContext should be put as
>> the first parameter to any JRubyMethod annotated method. It saves
>> having to retrieve it and as a result it is cheaper to provide it. We
>> did not originally support this, so some older annotations do not have
>> a threadcontext parameter on them.
>>
>> -Tom
>>
>> On Wed, Mar 3, 2010 at 9:47 AM, Joseph Athman <jjath...@gmail.com> wrote:
>> > I really didn't have a major reason for trying to implement this, I just
>> > figured it is something JRuby should have since MRI has it. I'm also
>> > forced
>> > to use windows on a regular basis so I have access to a machine to do
>> > the
>> > developing on.
>> >
>> > In this JIRA ticket (http://jira.codehaus.org/browse/JRUBY-191) it talks
>> > about using the Jacob library to implement this. I don't know enough
>> > about
>> > FFI to say whether that would work or not. If using FFI would be better
>> > I
>> > would be more than happy to try and learn how to use it. It seems like
>> > the
>> > lack of WIN32OLE support has not really held anyone back so I figure it
>> > would be a good place to learn since it obviously isn't a high priority.
>> >
>> > Joe
>> >
>> > On Wed, Mar 3, 2010 at 9:39 AM, Vladimir Sizikov <vsizi...@gmail.com>
>> > wrote:
>> >>
>> >> Hi Joseph,
>> >>
>> >> I might be *totally* off the base, so don't pay too much attention to
>> >> what I'm going to say ;)
>> >>
>> >> Now that JRuby has great FFI support, my understanding is that one
>> >> might implement WIN32OLE purely in ruby.
>> >> Like, for example, we implement Win32API.rb (lib\ruby\1.8\Win32API.rb).
>> >>
>> >> Is there particular reason you're going to implement WIN32OLE in Java?
>> >>
>> >> Thanks,
>> >> --Vladimir
>> >>
>> >> On Wed, Mar 3, 2010 at 4:34 PM, Joseph Athman <jjath...@gmail.com>
>> >> wrote:
>> >> > I've always wanted to contribute something to JRuby so I was looking
>> >> > through
>> >> > JIRA and noticed that JRuby still does not have the WIN32OLE api, I
>> >> > thought
>> >> > maybe that is something I could try and implement. I quickly
>> >> > discovered
>> >> > that I'm not totally sure how to go about this though. I was trying
>> >> > to
>> >> > look
>> >> > at some of the other ruby standard lib classes that have been
>> >> > created,
>> >> > but
>> >> > I'm hoping I could get a little help here. My two main questions are
>> >> > about
>> >> > the @JRubyMethod annotation and the actual method parameters. It
>> >> > seems
>> >> > like
>> >> > some methods take a ThreadContext object while some don't. Take for
>> >> > example
>> >> > this method from the WIN32OLE class:
>> >> >
>> >> > WIN32OLE.connect('Excel.Application') # => WIN32OLE object which
>> >> > represents
>> >> > running Excel.
>> >> >
>> >> > What would the method signature for that look like? I'm guessing
>> >> > this
>> >> > would
>> >> > be a static Java method, but I'm not sure. Would there just be one
>> >> > parameter in the Java code? Would it be an IRubyObject or would be
>> >> > be a
>> >> > RubyString? I looked on the JRuby wiki but I didn't really see
>> >> > anything
>> >> > about this. If there is more information out there you can just
>> >> > point
>> >> > me in
>> >> > that direction. Thanks for any help.
>> >> >
>> >> > Joe
>> >> >
>> >>
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>> >>
>> >>
>> >
>> >
>>
>>
>>
>> --
>> blog: http://blog.enebo.com twitter: tom_enebo
>> mail: tom.en...@gmail.com
>>
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