avoid the dynamic interface proxy creation on factory.call(ContextAction) (fixes #30)

lib/rhino/context.rb

@@ -85,21 +85,8 @@ module Rhino
     def initialize(options = {}) #:nodoc:
       factory = options[:factory] ||
         (options[:restrictable] ? RestrictableContextFactory.instance : self.class.default_factory)
-      factory.call do |context|
+      @options = options
-        @native = context
+      factory.call(self) # org.mozilla.javascript.ContextAction (invokes #run)
-        @global = @native.initStandardObjects(nil, options[:sealed] == true)
-        if with = options[:with]
-          @scope = Rhino.to_javascript(with)
-          @scope.setParentScope(@global)
-        else
-          @scope = @global
-        end
-        unless options[:java]
-          for package in ["Packages", "java", "javax", "org", "com", "edu", "net"]
-            @global.delete(package)
-          end
-        end
-      end
       if optimization_level = options[:optimization_level] || self.class.default_optimization_level
         self.optimization_level = optimization_level
       end
@@ -109,6 +96,26 @@ module Rhino
       yield(self) if block_given?
     end
 
+    include JS::ContextAction
+
+    # org.mozilla.javascript.ContextAction public Object run(Context context);
+    def run(context) # :nodoc:
+      @native = context
+      @global = @native.initStandardObjects(nil, @options[:sealed] == true)
+      if with = @options[:with]
+        @scope = Rhino.to_javascript(with)
+        @scope.setParentScope(@global)
+      else
+        @scope = @global
+      end
+      unless @options[:java]
+        @global.delete('Packages')
+        @global.delete('java'); @global.delete('javax')
+        @global.delete('org'); @global.delete('com')
+        @global.delete('edu'); @global.delete('net')
+      end
+    end
+
     # Returns the ContextFactory used while creating this context.
     def factory
       @native.getFactory
@@ -173,7 +180,7 @@ module Rhino
       if restrictable?
         @native.instruction_limit = limit
       else
-        raise "setting an instruction_limit has no effect on this context, use " + 
+        raise "setting an instruction_limit has no effect on this context, use " <<
               "Context.open(:restrictable => true) to gain a restrictable instance"
       end
     end
@@ -190,7 +197,7 @@ module Rhino
       if restrictable?
         @native.timeout_limit = limit
       else
-        raise "setting an timeout_limit has no effect on this context, use " + 
+        raise "setting an timeout_limit has no effect on this context, use " <<
               "Context.open(:restrictable => true) to gain a restrictable instance"
       end
     end