Forum: JRuby Java arrays in jruby

Im trying to create and pass a java array to a java method.
According to the CallingJavaFromJRuby, one could just use the to_java
method to create the java array.  However, using to_java is not
creating a Java array but org.jruby.java.proxies.ArrayJavaProxy.  If I
pass the proxy array to the java method that requires a java array,
the java method issues an exception:

         NameError: no method 'addGlobalAttribute' for arguments
(org.jruby.RubyString, org.jruby.java.proxies.ArrayJavaProxy) on
Java::UcarNc2::NetcdfFileWriteable

Am I doing something wrong?


Thanks,

--
Rodrigo Botafogo
Integrando TI ao seu negcio

The error message is unfortunately misleading here (and I'd appreciate a
bug report so we remember to fix it in 1.7 timeframe). You *are* 
actually
creating a Java array, but for Ruby to handle it like a Ruby object we 
wrap
it in another object of type ArrayJavaProxy.

The error is probably caused by calling a method with the wrong type of
argument. How are you creating the Java array via to_java? (show code,
please)

- Charlie

Hi Charles,

Thanks for your reply.  Ill file the bug report.  You are right.
Ive figured the problem out.  The method Im calling is expecting an
Array, but not a Java Array. It is the array type defined in the
library Im using.

Thanks for your help.


Rodrigo


On Sun, Jul 8, 2012 at 12:09 AM, Charles Oliver Nutter
<headius@headius.com> wrote:
>
>>          NameError: no method 'addGlobalAttribute' for arguments
>> Integrando TI ao seu negcio
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--
Rodrigo Botafogo
Integrando TI ao seu negcio