Can a Ruby script in JRuby use my Java classes if I haven't shared them with it?

Question

If I have a Ruby script executed by ScriptingContainer of JRuby in my Java application, is the Ruby script capable of accessing or making use of a class I have defined in my Java application if I haven't shared anything with the script?

By sharing this is what I mean:

ruby = new ScriptingContainer(LocalVariableBehavior.PERSISTENT);
ruby.put("main", MyClass.class);
ruby.runScriptlet(readFile("Test.rb"));

As you can see, I am sharing with the Ruby script a variable called main, whose value is MyClass.class.

If I don't share anything, is the Ruby script still capable of using MyClass in my application?

Community · Accepted Answer · 2017-05-23 12:04:34Z

3

Yes, as per my answer there: if MyClass is on your classpath/$LOAD_PATH, JRuby will pick it up when you java_import it.

edited May 23, 2017 at 12:04

CommunityBot

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answered Jan 10, 2013 at 9:50

Sébastien Le Callonnec

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4 Comments

Saturn Over a year ago

Ah, and it can't be avoided?

Sébastien Le Callonnec Over a year ago

@Omega What do you want to avoid? Putting the class on the classpath?

Saturn Over a year ago

That despite having the classes on the classpath, avoid the java_import.

Sébastien Le Callonnec Over a year ago

You must either use the Java:: prefix or java_import as your class is in the "default" package, or put your class in a package that starts with either org or com and then refer to the class with its fully-qualified name.

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