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ruby_thing.rb:

require 'jruby/core_ext'
puts "hello from ruby"

class RubyThing
  include org.test.RubyInit::RubyThingInterface

  def setJt(java_thing)
    puts "setJt"

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module Imports
  import com.dutchcoastsoftware.tsunami.server.ClientFrontend
  import com.dutchcoastsoftware.tsunami.server.ClientFrontendImpl
  import org.waveprotocol.wave.examples.fedone.waveserver.WaveletListener
  import org.waveprotocol.wave.examples.fedone.waveserver.WaveletProvider
  import org.waveprotocol.wave.model.id.WaveId
  import org.waveprotocol.wave.model.id.WaveletName
  import org.waveprotocol.wave.model.wave.ParticipantId
  Common = org.waveprotocol.wave.protocol.common
end

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import System.TimeIt
import System.Random
import Control.Parallel.Strategies (NFData(..))
import Control.Exception (evaluate)

-- rpartition :: (a -> Bool) -> [a] -> ([a], [a])
-- rpartition p = go [] []
--  where
--     go ts fs [] = (ts, fs)
--     go ts fs (x:xs) | p x       = go (x:ts) fs xs

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import System.TimeIt
import System.Random
import Control.Parallel.Strategies (NFData(..))
import Control.Exception (evaluate)

rpartition :: (a -> Bool) -> [a] -> ([a], [a])
rpartition p = go [] []
 where
    go ts fs [] = (ts, fs)
    go ts fs (x:xs) | p x       = go (x:ts) fs xs

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diff --git a/build.xml b/build.xml
index 8979d97..87ac1d6 100644
--- a/build.xml
+++ b/build.xml
@@ -211,17 +211,26 @@
     <jar destfile="${jar.outfile-server}">
       <fileset dir="${staging}">
         <include name="META-INF/services/*" />
+        <include name="builtin/**/*" />
+        <include name="com/dutchcoastsoftware/tsunami/**/*" />

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starting server
opts: StartupConfig {connectionMode = TCPIP False 4005, autoPort = False, showHelp = False}
=== Listening on port: 4005
==> {"id":1,"method":"connection-info","params":{}}
<== {"version":"0.1","id":1,"result":{"version":1,"pid":0}}
==> {"id":2,"method":"list-cabal-components","params":{"cabal-file":"/home/mathijs/workspace/json/json.cabal"}}
<== {"version":"0.1","id":2,"result":[{"library":null,"cabal-file":"/home/mathijs/workspace/json/json.cabal"}]}
==> {"id":3,"method":"load","params":{"component":{"library":null,"cabal-file":"/home/mathijs/workspace/json/json.cabal"},"output":false}}
Configuring json-0.1...
Creating .dist-scion (and its parents)

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org.eclipse.core.internal.resources.ResourceException: The resource tree is locked for modifications.                                                                                
        at org.eclipse.core.internal.resources.WorkManager.checkIn(WorkManager.java:115)                                                                                             
        at org.eclipse.core.internal.resources.Workspace.prepareOperation(Workspace.java:1747)                                                                                       
        at org.eclipse.core.internal.resources.Resource.deleteMarkers(Resource.java:762)                                                                                             
        at net.sf.eclipsefp.haskell.scion.client.ScionInstance.deleteProblems(ScionInstance.java:283)                                                                                
        at net.sf.eclipsefp.haskell.scion.client.ScionInstance.buildProject(ScionInstance.java:141)               

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java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jruby.javasupport.proxy.JavaProxyClassFactory.invokeDefineClass(JavaProxyClassFactory.java:256)
        at org.jruby.javasupport.proxy.JavaProxyClassFactory.generate(JavaProxyClassFactory.java:221)
        at org.jruby.javasupport.proxy.JavaProxyClassFactory.newProxyClass(JavaProxyClassFactory.java:174)
        at org.jruby.javasupport.proxy.JavaProxyClass.getProxyClass(JavaProxyClass.java:122)
        at org.jruby.javasupport.proxy.JavaProxyClass.get_with_class(JavaProxyClass.java:693)
        at org.jruby.javasupport.Java$5.call(Java.java:580)

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I have a java method that requires one or more classes:
public class FlagBinder {
  public static Module parseFlags(String[] args, Class<?>... flagSettings) throws ParseException {


I tried different kinds of combinations of .java_class, .to_java but couldn't get it working.
Java code that uses this class does this:
    Module flags = FlagBinder.parseFlags(args, FlagSettings.class);

Now in ruby I tried:

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// map function
function(op) {
  if(op.channel) {
    emit(op.channel, op);
  }
}


// reduce
function(keys, ops, rereduce) {