module Rhino
  module To        
    JS_UNDEF = [J::Scriptable::NOT_FOUND, J::Undefined]
    
    def ruby(object)
      case object
      when *JS_UNDEF          then nil
      when J::Wrapper         then object.unwrap
      when J::NativeArray     then array(object)
      when J::Function        then NativeFunction.new(object)
      when J::Scriptable      then NativeObject.new(object)
      else  object
      end        
    end
    
    def javascript(object)
      case object
      when String,Numeric       then object
      when TrueClass,FalseClass then object
      when Array                then J::NativeArray.new(object.to_java)
      when Proc,Method          then RubyFunction.new(object)
      when NativeObject         then object.j      
      when J::Scriptable        then object
      else RubyObject.new(object)
      end
    end
    
    def array(native)
      native.length.times.map {|i| native.get(i,native)}
    end
    
    module_function :ruby, :javascript, :array
  end
end