My initial design of the JCP implementation,YOUR suggestions required

Question

I have no experiences before on Javacard/Smartcard/COS...
Here is a simple/naive design after reading JCP specs and smartcard handbook, etc.
Please give me some guides/suggestions/references
Thanks.
The ideas below lacks of supporting materials.
The relation between COS and JCRE:
1. JCRE has lots function of the COS like Security Manger, Transmission Manager, Command APDU handle,
Application Manager(implemented as Applet), File Manager(implemented as Applet)
2. The main() of a COS is a loop receiving/sending APDU.
3. The IO loop could be implemented as Java code.
GUESS:so the JCP(VM, API, JCRE, Applets) plus native functions(IO, crypto) is the COS.
The function/class below form the COS of a smartcard
//1.cos
int main()
     JCVM_run(JCRE);
//2. cos components == javacrd native functions
usb_opertions();
hash256();
//3. JCRE
class JCRE
     APDUDispatcher apduDispatcher;
     IOManager ioManager;
     SecManager secManager;
     Applet[] currSelectedApplets;
     start()
          presetApplets.install();
          ioManager.registerListener(apduDispatcher);
          ioManager.loop();
     switchApplet(newApplet)
          if(!firewallCheck())
               return;
          oldApplet.deselect();
          newApplet.select();
//3.1. APDUDispatcher, like the "card manager" in OpenCard
class APDUDispatcher
     //1 raw byte stream -> APDU
     //2 default process
     //3 delegate to applets
     process()
          switch()
          case SELECT_FILE:
               JCRE.switchApplet(findApplet());
               break;
          default:
               logicalChannelNo;
               JCRE.currSelectedApplets.process(apdu);
//3.2. IOManager
//java wrapper for lowlevel io operations
class IOManager
     loop()
          while(1)
               if(read())
                    apduDispatcher.process();
//3.3. SecManager
class SecManager
     firewallCheck()
     capAuth()
Please give me some guides/suggestions/references
Thanks.

Answer 1

The idea is right.
I've found an similar implementation here.
why2.38 lib/why/javacard_api/javacard/framework/Dispatcher.java
(note: this is javacard.framework.Dispatcher not javacard.framework.service.Dispatcher, the first one is part of JCRE, instead of part of API)
http://docs.camlcity.org/docs/godipkg/3.11/apps-why/lib/why/javacard_api/javacard/framework/Dispatcher.java
Wish helpful.