Thanks Jean-Sebastien. Will watch for that.
On 9/12/06, Jean-Sebastien Delfino <[EMAIL PROTECTED]> wrote:
Venkata Krishnan wrote:
> Hi,
>
> This time around I am stuck with passing java object instances to
> ruby. I
> need this to enable service reference calls from Ruby. I want to be
> able
> to pass to ruby an instance of a Java proxy to an external service (say
> StockQuote). Then from ruby I want to make service method calls over
> this
> proxy.
>
> I have tried setting the java object to a ruby global variable, after
> converting the java object to a ruby object ofcourse. But this does not
> work as it seems like I must instantiate the object from within the ruby
> context.
>
> Is there any other way to do this?
>
> - Thanks
>
> - Venkat
>
> On 9/8/06, Venkata Krishnan <[EMAIL PROTECTED]> wrote:
>>
>> Hi Simon, Jean-Sebastien and Ant,
>>
>> Thanks. I see it working now :-). The leads that each of you gave is
>> all that is to it.
>>
>> Ant, I will put in a patch with this update soon. Thanks for taking
the
>> pains and trying it yourself.
>>
>> - Venkat
>>
>> On 9/8/06, ant elder <[EMAIL PROTECTED]> wrote:
>> >
>> > After playing around with this I think what Simon and Jean-Sebastien
>> > have
>> > already said is correct, its the ".new" that does it. Right now the
>> > createInstance method is:
>> >
>> > public RubyScriptInstance createScriptInstance() {
>> > return new RubyScriptInstance(rubyEngine.evalScript
>> > (getScript()),
>> > responseClasses);
>> > }
>> >
>> > Assuming you add a class attribute to the scdl and store that value
>> in a
>> > className field in RubyScript then I think the following should work:
>> >
>> > public RubyScriptInstance createScriptInstance() {
>> > IRubyObject rubyInstance =
>> rubyEngine.evalScript(getScript());
>> > if (className != null) {
>> > rubyInstance = rubyEngine.evalScript (className +
".new");
>> > }
>> > return new RubyScriptInstance(rubyInstance ,
responseClasses);
>> > }
>> >
>> > ...ant
>> >
>> >
>> >
>> > On 9/8/06, Jean-Sebastien Delfino < [EMAIL PROTECTED]> wrote:
>> > >
>> > > Venkata Krishnan wrote:
>> > > > Hi
>> > > >
>> > > > The current implementation of Ruby in Java works only for scripts
>> > that
>> > > > have
>> > > > global methods. I am interested getting this work for methods
>> > inside
>> > > > classes.. But then I am not able to figure out a way of doing
>> this.
>> > > >
>> > > > Can somebody help me with clues on the following... maybe even if
>> > the
>> > > C++
>> > > > guys are able to provide me some hints conceptually I can map
>> it to
>> > the
>> > > > JRuby stuff. Here is what I do...
>> > > >
>> > > > 1) I load the script into the Ruby engine and get a RubyObject
out
>> > of it
>> > > > 2) call the invoke method on the Ruby object to invoke the Ruby
>> > > functions
>> > > > - in this invoke method there is no way I am able to specify
>> the
>> > > > RubyClass whos method I should invoke. All that it takes is the
>> > > > method name
>> > > > as a string. I tried using <ruby classname>.<ruby methodname>
for
>> > the
>> > > > method argument but failed.
>> > > >
>> > > > So how do I specify the class?
>> > > >
>> > > > Thanks
>> > > >
>> > > > - Venkat
>> > > >
>> > > > On 9/8/06, Simon Laws < [EMAIL PROTECTED]> wrote:
>> > > >>
>> > > >> On 9/8/06, ant elder < [EMAIL PROTECTED]> wrote:
>> > > >> >
>> > > >> > Yes we should be able to do the same type of thing with
>> Java. Is
>> > > >> the PHP
>> > > >> > SDO
>> > > >> > API the same as the C++ API or is it simplified?
>> > > >> >
>> > > >> > I think for most if not all the Java based scripting
>> languages we
>> > can
>> > > >> just
>> > > >> > expose the Java SDO API to the scripting language (at one
point
>> > we
>> > > >> had a
>> > > >> > JavaScript version of the Big Bank sample account module
>> that did
>> >
>> > > >> this),
>> > > >> > but
>> > > >> > there are probably ways to use the dynamic nature of the
script
>> > > >> languages
>> > > >> > to
>> > > >> > come up with a simplify SDO API.
>> > > >> >
>> > > >> > ...ant
>> > > >> >
>> > > >> > On 9/7/06, Simon Laws <[EMAIL PROTECTED]> wrote:
>> > > >> > >
>> > > >> > > > In PHP we have an implementation of SDO that is fully
based
>> > on
>> > > the
>> > > >> C++
>> > > >> > > SDO
>> > > >> > > > implementation. I'm not sure if it will be instructive
>> in the
>> >
>> > > java
>> > > >> > space
>> > > >> > > but
>> > > >> > > > we have pretty much just wrapped the C++ SDO interfaces
and
>> > > >> exposed
>> > > >> > them
>> > > >> > > as
>> > > >> > > > native PHP objects. I guess you would have to do a similar
>> > > >> thing in
>> > > >> > Ruby
>> > > >> > > or
>> > > >> > > > any other extension for that matter. The solution will
>> depend
>> >
>> > > >> on how
>> > > >> > you
>> > > >> > > > construct extensions to your scripting language. In PHP it
>> > just
>> > > so
>> > > >> > > happens
>> > > >> > > > you have to do it in C/C++ but I would hope you can do
>> it in
>> > Java
>> > > >> for
>> > > >> > > JVM
>> > > >> > > > based environments.
>> > > >> > > >
>> > > >> > >
>> > > >> > >
>> > > >> > > S
>> > > >> > >
>> > > >> > >
>> > > >> >
>> > > >> > The SDO API in PHP is fairly similar to the C++ SDO but is
>> > simplified
>> > > >> and
>> > > >> in particular it tries to take avantage of the features of PHP
so
>> > > >> that it
>> > > >> is
>> > > >> comfortable to use for the PHP programmer. For example, a
typical
>> > > >> user of
>> > > >> the XML DAS might do
>> > > >>
>> > > >> $xmldas->addTypes(" company.xsd ");
>> > > >> $document = $xmldas->loadFile("company.xml");
>> > > >> $company = $document->getRootDataObject();
>> > > >> $company_name = $company->name; // property access style
>> > > >> $company_name = $company['name']; // associative array access
>> > style
>> > > >> $company_name = $company[0]; // index array access style
>> > > >>
>> > > >> The trick is make the experience as natural for the script
>> > developer
>> > > >> as possible so we have, for example, provided all the normal
PHP
>> > > >> object access styles.
>> > > >>
>> > > >> Also our user space implementation of the relational DAS is
quite
>> > > >> different from the current java implementation.
>> > > >>
>> > > >> Regards
>> > > >>
>> > > >> Simon
>> > > >>
>> > > >>
>> > > >
>> > > Venkat,
>> > >
>> > > I'm not sure how you do with thiw JRuby, but you should call the
>> > target
>> > > method on an instance of the Ruby component implementation class,
>> not
>> > on
>> > > the class itself. So do something like:
>> > > 1. invoke " Calculator.new" and get an object representing your
Ruby
>> > object
>> > > 2. get an object representing the "add" method
>> > > 3. invoke that method on the Ruby instance
>> > >
>> > > --
>> > > Jean-Sebastien
>> > >
>> > >
>> > >
>> ---------------------------------------------------------------------
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>> > > For additional commands, e-mail: [EMAIL PROTECTED]
>> > >
>> > >
>> >
>> >
>>
>
Venkata,
I'm working on enabling Ruby references and properties, as part of a
bigger task to get a complete scripting implementation that can serve as
a template for others, I'm just starting to dig into that (make a C++ or
Java object look like a Ruby object to Ruby). I'll give you an update
once I have it running with the C++ runtime, then you'll probably be
able to do something similar with Java.
--
Jean-Sebastien
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