Access enums from Jar file in Jruby

Question

I'm trying to access the following static enum

public class Colors
{
    public enum ListofColors 
    {
        BLUE, RED, YELLOW
    }
}

But I keep getting the error

NameError: cannot load Java class Colors.Colors::ListofColors::BLUE

When I try the following:

CL = JavaUtilities.get_proxy_class('Colors.Colors::ListofColors::BLUE')

but then I tried the following:

CL = JavaUtilities.get_proxy_class('Colors.Colors')
red = Colors.Colors::ListofColors::RED

And it gave me the following error:

NameError: uninitialized constant Colors

Is there a different way to get this static enum from the jar file and include it in Jruby without getting that errpr?

Thanks.

score 0 · Accepted Answer · edited May 23 '17 at 12:03

0

I think you need package::class, you repeated Colors twice

also see

Problems Calling a Java Class from JRuby

figure out if java_import helps you https://github.com/jruby/jruby/wiki/CallingJavaFromJRuby

Also you dont seem to be using the variable CL, Try using

CL::ListofColors::Blue

edited May 23 '17 at 12:03

Community

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answered Nov 09 '15 at 14:09

Kalpesh Soni

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My package name is Colors and my Class name is also Colors – hello_its_me Nov 09 '15 at 14:09
The problem is not with calling the class, the problem is with getting the constant enum Red – hello_its_me Nov 09 '15 at 14:10
1

package name with upper case? try using :: ? – Kalpesh Soni Nov 09 '15 at 14:10
I can call the class, no problem there. The error rises when I try to get the enum Red – hello_its_me Nov 09 '15 at 14:11
that is not evident from what you have posted so far and you are not even using CL variable – Kalpesh Soni Nov 09 '15 at 14:12
1

Any particular reason why your ListofColors enum is inside your class? Maybe it would be easier to reach if it were outside the class. – JRSofty Nov 09 '15 at 14:12
@JRSofty I can't control that, I've been given the jar file and I only need to use it in Jruby – hello_its_me Nov 09 '15 at 14:16
then try CL.new first and then access enum – Kalpesh Soni Nov 09 '15 at 14:17
@KalpeshSoni Please note that I can call the class (package::class) without any errors. All I need now is to get the enum – hello_its_me Nov 09 '15 at 14:17
try CL.new().ListofColors.BLUE – Kalpesh Soni Nov 09 '15 at 14:22
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Nested `enum`s are implicitly static, there's no need to explicitly declare them static. – biziclop Nov 09 '15 at 14:45
Thank you everyone, especially @KalpeshSoni. That did not work, but this did: CL::ListofColors::Blue – hello_its_me Nov 09 '15 at 14:46
@KalpeshSoni Maybe edit your answer so that I can check it as the correct answer? Thanks. – hello_its_me Nov 09 '15 at 21:04

Access enums from Jar file in Jruby

1 Answers1