@ tefigel

|--
|   Common template for different Actions. Reuse common code blocks
|   and differentiate where needed. Fairly complex script.
|--
interface(TARGET_ACTION)

set CUR_ACTION=~to_lower(TARGET_ACTION)
set LOG_MSG=JAVA_CLASS could not be CUR_ACTION&d. 
set LOG_MSG_TAIL=

case TARGET_ACTION

   when=Create
      set JLIST=JAVA_PROPERTIES
      set  JIDS=JAVA_PROP_ID_LIST
      set JCOMMENT=

   when=Delete
      set JLIST=JAVA_PKEYS
      set  JIDS=JAVA_PKEY_ID
      set JCOMMENT= current

   when=Detail
      set JLIST=
      set  JIDS=
      set JCOMMENT=
      set LOG_MSG=JAVA_CLASS could not be listed. id=
      set LOG_MSG_TAIL= + index;

   when=List
      set JLIST=
      set  JIDS=
      set JCOMMENT=
      set LOG_MSG=JAVA_CLASS&s could not be CUR_ACTION&ed

   when=Update
      set JLIST=JAVA_PROPERTIES
      set  JIDS=JAVA_PROP_ID_LIST
      set JCOMMENT= current
endcase

@ text
package JAVA_PACKAGE;

@ if TARGET_ACTION=List
import java.util.ArrayList;
import java.util.Collection;

@ endif
import javax.servlet.http.*;

import org.apache.log4j.Logger;
import org.apache.struts.action.*;

public final class TARGET_ACTION&JAVA_CLASS&Action extends Common&JAVA_CLASS&Action {

   private static Logger logger = 
     Logger.getLogger(TARGET_ACTION&JAVA_CLASS&Action.class.getName());

   public ActionForward commonExecute(
      ActionMapping mapping,
      ActionForm form,
      HttpServletRequest request,
      HttpServletResponse response) {

      ActionErrors errors = new ActionErrors();

@ case TARGET_ACTION
@    when=List
      // Get the JAVA_CLASS manager factory
@    when=Detail
      // Get the index of the JAVA_CLASS (given in the hyperlink)
      Detail&JAVA_CLASS&Form df = (Detail&JAVA_CLASS&Form) form;
      String index = df.get&JAVA_PKEY_UCID();
      if (index == null || index.equals("")) {
         // Logging the error:
         String message = "No id given to the detail action";
         logger.fatal(message);
         
         // Message for the user:
         errors.add("label", new ActionError("error.noindex"));
         saveErrors(request, errors);
         
         // Save the exception:
         request.setAttribute("MYEXCEPTION", new DAOException(message));
         
         // Return to the error page
         return (mapping.findForward("error"));
      }

      // Get the factory class
@    otherwise
      // Get the data from the Form bean
      Detail&JAVA_CLASS&Form df = (Detail&JAVA_CLASS&Form) form;
@
@     list_process(JLIST,java/action_get)
@

      // Get the factory class
@ endcase
      HttpSession session = request.getSession();
      JAVA_CLASS&ManagerFactoryIF factory = (JAVA_CLASS&ManagerFactoryIF) session.getAttribute("JAVA_OBJ_INSTANCE&factory");
      JAVA_CLASS&ManagerIF manager = factory.create&JAVA_CLASS&Manager();

@ case TARGET_ACTION
@    when=Create
      // *************** SHOW REAL ERROR HANDLING: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
@    when=Detail
      // Transfer the data from the JAVA_OBJ_INSTANCE bean to the ActionForm
      JAVA_CLASS JAVA_OBJ_INSTANCE = null;
@    when=List
      Collection c = new ArrayList();

@ endcase
      try {
@ case TARGET_ACTION
@    when=List
         c = manager.getAll();
@    when=Detail
         JAVA_OBJ_INSTANCE = manager.get&JAVA_CLASS(index);
@    otherwise
         // TARGET_ACTION the&JCOMMENT JAVA_CLASS
         manager.CUR_ACTION&JAVA_CLASS(JIDS);
@ endcase
      } catch (DAOException e) {
@ if TARGET_ACTION#List
         // Logging the error:
         String message = "LOG_MSG"LOG_MSG_TAIL
@
@        list_process(JLIST,java/to_string)
@
         logger.fatal(message, e);
         
@ endif
         // Message for the user:
         errors.add("label", new ActionError("error.CUR_ACTION&failed"));
         saveErrors(request, errors);
         
@ if TARGET_ACTION=List
         // Logging the error:
         String message = "LOG_MSG";
         logger.fatal(message, e);
         
@ endif
         // Save the chained exceptions:
         request.setAttribute("MYEXCEPTION", new DAOException(message, e));
         
         // Return to the error page
         return (mapping.findForward("error"));
      }

@ case TARGET_ACTION
@    when=List
      session.setAttribute("JAVA_LIST_INSTANCE", c);

      return (mapping.findForward("list"));

@    when=Detail
      if (JAVA_OBJ_INSTANCE == null) {
         // Logging the error:
         String message = "JAVA_CLASS could not be listed. id=" + index;
         logger.fatal(message);
         
         // Message for the user:
         errors.add("label", new ActionError("error.detailfailed"));
         saveErrors(request, errors);
         
         // Save the chained exceptions:
         request.setAttribute("MYEXCEPTION", new DAOException(message));
         
         // Return to the error page
         return (mapping.findForward("error"));
      }
      
@     java/update_properties(action_detail)
      
      // Forward control to the list page
      return (mapping.findForward("detail"));
@    otherwise
      // Forward control to the next page
      return (mapping.findForward("OK"));

@ endcase
   }

}