Cannot subclass a Ruby class that implements a Java interface
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Key: JRUBY-1146
URL: http://jira.codehaus.org/browse/JRUBY-1146
Project: JRuby
Issue Type: Bug
Components: Java Integration
Affects Versions: JRuby 1.x
Environment: JRuby built from head (6/14/07), OSX 10.4, Java 1.5
Reporter: David Koontz
When instantiating a subclass of a class that implements a method, the
following exception is thrown:
Exception in thread "main"
file:/Users/dkoontz/dev/libs/jruby/lib/jruby-complete.jar!/builtin/javasupport/proxy/interface.rb:156:in
`__jcreate!': Java interface expected. got: (ArgumentError)
from
file:/Users/dkoontz/dev/libs/jruby/lib/jruby-complete.jar!/builtin/javasupport/proxy/interface.rb:138:in
`send'
from
file:/Users/dkoontz/dev/libs/jruby/lib/jruby-complete.jar!/builtin/javasupport/proxy/interface.rb:138:in
`new'
from ./bug_report.rb:7
from <script>:0:in `require'
from <script>:0
...internal jruby stack elided...
from org.jruby.Ruby.eval(Ruby.java:289)
from org.jruby.Ruby.evalScript(Ruby.java:282)
from bugreport.Main.<init>(Main.java:14)
from bugreport.Main.main(Main.java:18)
Here are the files that demonstrate this.
com/Main.java
package bugreport;
import java.util.ArrayList;
import org.jruby.Ruby;
import org.jruby.RubyInstanceConfig;
public class Main {
public Main() {
RubyInstanceConfig config = new RubyInstanceConfig();
Ruby runtime = Ruby.newInstance(config);
runtime.getLoadService().init(new ArrayList(0));
String app = "require 'java'\n" +
"require 'base'\n" +
"require 'sub'\n" +
"include_class 'bugreport.ExampleInterface'\n" +
"class Base\n" +
" include ExampleInterface\n" +
" def testMethod()\n" +
" puts 'in testMethod'\n" +
" end\n" +
"end\n" +
"class Sub < Base\n" +
"end\n" +
"b = Base.new\n" +
"b.testMethod\n" +
"s = Sub.new\n" +
"s.testMethod\n";
runtime.evalScript(app);
}
public static void main(String[] args) {
Main m = new Main();
}
}
com/TestInterface.java
package bugreport;
public interface ExampleInterface {
public void testMethod();
}
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