modifying source at runtime - jython case

Alan Kennedy alanmk at hotmail.com
Sat Nov 5 12:51:29 CET 2005


[Jan Gregor]
>  I want to apply changes in my source code without stopping jython
>  and JVM. Preferable are modifications directly to instances of
>  classes. My application is a desktop app using swing library.
>  
>  Python solutions also interest me.
> 
>  Solution similiar to "lisp way" is ideal.

OK, I'll play 20 questions with you.

How close is the following to what you're thinking?

begin SelfMod.java -------------------------------------------
//************************************************************
import org.python.util.PythonInterpreter;
import org.python.core.*;

class SelfMod
   {

   static String my_class_source =
     "class MyJyClass:\n" +
     "  def hello(self):\n" +
     "    print 'Hello World!'\n";

   static String create_instance = "my_instance = MyJyClass()\n";

   static String invoke_hello = "my_instance.hello()";

   static String overwrite_meth =
     "def goodbye():\n"+
     "  print 'Goodbye world!'\n" +
     "\n" +
     "my_instance.hello = goodbye\n";

   public static void main ( String args[] )
     {
     PythonInterpreter interp = new PythonInterpreter();
     interp.exec(my_class_source);
     interp.exec(create_instance);
     interp.exec(invoke_hello);
     interp.exec(overwrite_meth);
     interp.exec(invoke_hello);
     }

   }
//************************************************************
end SelfMod.java ---------------------------------------------

need-to-complete-my-coursework-for-telepathy-101-ly y'rs

-- 
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan



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