From: Nicholas Van Weerdenburg <nick@...>
Date: 2004-07-23T10:35:48+09:00
Subject: JRuby and include statements and JDBC

Hi All,

JRuby list is quiet, so I was wondering if anyone here might be able to 
help with the following question (below).

Thanks,
Nick

----------------------------------------------------------------------------------------------
Hi,

I was asking about the syntax of java package includes a while back and 
gave this example:

require "java"
module Java
    include_package "java.util"
end
v=Java::Vector.new


In wanting to not have to type Java:: for each class, I tried a Ruby 
idiom I recently learned (I'm fairly new to it):

require "java"
module Java
    include_package "java.util"
end
include Java
v=Vector.new

Which doesn't work. Is this a current limitation in Jruby? Does it have 
something to do with the lazy-loading I heard mentioned before? Or am I 
missing something. I figure if this worked, it would be 10 to 20 lines 
of code or so to implement my own "import" method that works just like 
Java or Jython syntax, and that would be cool.

On a related topic, I tried to use Class.forname("...")  Java idiom to 
load a JDBC driver (with the appropriate Module include_package and 
prefixes), and it failed. Is there a known limitation here?

Final note- any advocacy tips/issues for recommending JRuby over Jython?

Thanks,
Nick