externals

[Jiro Harada]

Randall,

Java provides a lot of methods for File IO, which are abstracted and  
platform-dependent. My external enables them to be used from within Rev.

Java Swing offers a platform-independent file or directory chooser  
dialog. However I have never tested it by using my external. I will  
test it and inform you of the result later. I don't think my external  
can open dialogs created in Java.

Jiro Harada



On 2009/01/19, at 11:21, Randall Reetz wrote:

> Well, good, thanks, i guess that provides a path to cross pltform  
> external supported code.  Do java machines offer file IO and  
> directory navigation?  How about reaching into file system events  
> as they happen and generating rev messages?
>
> -----Original Message-----
> From: "Jiro Harada" <jiro at ronri-kobo.com>
> To: "How to use Revolution" <use-revolution at lists.runrev.com>
> Sent: 1/18/2009 5:42 PM
> Subject: Re: externals
>
> Randall,
>
>> In rev, are externals written to a reference VM so that they are
>> only written once and can run on any platform?  Or, do they have to
>> be written separately to each platform? Can java programs be called
>> as externals?
>>
>> Randall
>
> I have written an external to launch a JVM and call the Java methods
> on Windows and Mac OS. By the external the Java methods can be called
> as external commands or functions of Rev on both platforms. The
> external also enables the Java programs to send messages to Rev's
> handlers.
>
> The demo is downloadable at the following URL:
> http://www.f-ab.net
>
> The demo is created by Runrev 3.0. In the demo, Derby(relational
> database in written Java), HttpClient(http components written Java),
> Red5(Flash server written in Java) and Sphinx-4(speech recognizer
> written in Java) are used.
>
> Jiro Harada
>