// be_produce.cpp,v 1.17 2004/10/25 15:13:05 parsons Exp

/*

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 */

// BE_produce.cc - Produce the work of the BE - does nothing in the
//                 dummy BE

#include "global_extern.h"
#include "TAO_IFR_BE_Export.h"
#include "be_extern.h"
#include "ast_root.h"
#include "ifr_visitor_macro.h"
#include "ifr_removing_visitor.h"
#include "ifr_adding_visitor.h"

ACE_RCSID (be,
           be_produce,
           "be_produce.cpp,v 1.17 2004/10/25 15:13:05 parsons Exp")

// Clean up before exit, whether successful or not.
// Need not be exported since it is called only from this file.
void
BE_cleanup (void)
{
  idl_global->destroy ();

  // Remove the holding scope entry from the repository.
  ACE_DECLARE_NEW_CORBA_ENV;
  ACE_TRY
    {
      CORBA::Contained_var result =
        be_global->repository ()->lookup_id (be_global->holding_scope_name ()
                                             ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      if (!CORBA::is_nil (result.in ()))
        {
          CORBA::ModuleDef_var scope =
            CORBA::ModuleDef::_narrow (result.in ()
                                       ACE_ENV_ARG_PARAMETER);
          ACE_TRY_CHECK;

          scope->destroy (ACE_ENV_SINGLE_ARG_PARAMETER);
          ACE_TRY_CHECK;
        }
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           ACE_TEXT ("BE_cleanup"));
    }
  ACE_ENDTRY;
}

// Abort this run of the BE.
TAO_IFR_BE_Export void
BE_abort (void)
{
  ACE_ERROR ((LM_ERROR,
              ACE_TEXT ("Fatal Error - Aborting\n")));

  BE_cleanup ();

  ACE_OS::exit (1);
}

void
BE_create_holding_scope (ACE_ENV_SINGLE_ARG_DECL)
{
  CORBA::ModuleDef_ptr scope = CORBA::ModuleDef::_nil ();

  // If we are multi-threaded, it may already be created.
  CORBA::Contained_var result =
    be_global->repository ()->lookup_id (be_global->holding_scope_name ()
                                         ACE_ENV_ARG_PARAMETER);
  ACE_CHECK;

  if (CORBA::is_nil (result.in ()))
    {
      scope =
        be_global->repository ()->create_module (
                                      be_global->holding_scope_name (),
                                      be_global->holding_scope_name (),
                                      "1.0"
                                      ACE_ENV_ARG_PARAMETER
                                    );
      ACE_CHECK;
    }
  else
    {
      scope = CORBA::ModuleDef::_narrow (result.in ()
                                         ACE_ENV_ARG_PARAMETER);
      ACE_CHECK;
    }

  be_global->holding_scope (scope);
}

int
BE_ifr_repo_init (ACE_ENV_SINGLE_ARG_DECL)
{
  CORBA::Object_var object =
    be_global->orb ()->resolve_initial_references ("InterfaceRepository"
                                                    ACE_ENV_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  if (CORBA::is_nil (object.in ()))
    {
      ACE_ERROR_RETURN ((
          LM_ERROR,
          ACE_TEXT ("Null objref from resolve_initial_references\n")
        ),
        -1
      );
    }

  CORBA::Repository_var repo = 
    CORBA::Repository::_narrow (object.in ()
                                ACE_ENV_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  if (CORBA::is_nil (repo.in ()))
    {
      ACE_ERROR_RETURN ((
          LM_ERROR,
          ACE_TEXT ("CORBA::Repository::_narrow failed\n")
        ),
        -1
      );
    }

  be_global->repository (repo._retn ());

  return 0;
}

// Do the work of this BE. This is the starting point for code generation.
TAO_IFR_BE_Export void
BE_produce (void)
{
  ACE_DECLARE_NEW_CORBA_ENV;
  ACE_TRY
    {
      int status = BE_ifr_repo_init (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;
      
      if (status != 0)
        {
          return;
        }

      BE_create_holding_scope (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Get the root node.
      AST_Decl *d = idl_global->root ();
      AST_Root *root = AST_Root::narrow_from_decl (d);

      if (root == 0)
        {
          ACE_ERROR ((LM_ERROR,
                      ACE_TEXT ("(%N:%l) BE_produce - ")
                      ACE_TEXT ("No Root\n")));

          BE_abort ();
        }

      if (be_global->removing ())
        {
          ifr_removing_visitor visitor;

          TAO_IFR_VISITOR_WRITE_GUARD;

          // If the visitor is dispatched this way, we need to override
          // only visit_scope() for the removing visitor.
          if (visitor.visit_scope (root) == -1)
            {
              ACE_ERROR ((
                  LM_ERROR,
                  ACE_TEXT ("(%N:%l) BE_produce -")
                  ACE_TEXT (" failed to accept removing visitor\n")
                ));

              BE_abort ();
            }
        }
      else
        {
          ifr_adding_visitor visitor (d);

          TAO_IFR_VISITOR_WRITE_GUARD;

          if (root->ast_accept (&visitor) == -1)
            {
              ACE_ERROR ((
                  LM_ERROR,
                  ACE_TEXT ("(%N:%l) BE_produce -")
                  ACE_TEXT (" failed to accept adding visitor\n")
                ));

              BE_abort ();
            }
        }
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           ACE_TEXT ("BE_produce"));

    }
  ACE_ENDTRY;

  // Clean up.
  BE_cleanup ();
}
