tie_sh.cpp

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//
// tie_sh.cpp,v 1.23 2003/03/12 16:50:33 parsons Exp
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    tie_sh.cpp
//
// = DESCRIPTION
//    Visitor generating code for TIE class for an Interface in the header
//    file.
//
// = AUTHOR
//    Aniruddha Gokhale
//
// ============================================================================

ACE_RCSID (be_visitor_interface, 
           tie_sh, 
           "tie_sh.cpp,v 1.23 2003/03/12 16:50:33 parsons Exp")

// ************************************************************
// Interface visitor for server header.
// ************************************************************

be_visitor_interface_tie_sh::be_visitor_interface_tie_sh (
    be_visitor_context *ctx
  )
  : be_visitor_interface (ctx)
{
}

be_visitor_interface_tie_sh::~be_visitor_interface_tie_sh (void)
{
}

int
be_visitor_interface_tie_sh::visit_interface (be_interface *node)
{
  if (node->imported () || node->is_abstract ())
    {
      return 0;
    }

  static char namebuf [NAMEBUFSIZE];
  static char tiename [NAMEBUFSIZE];

  ACE_OS::memset (namebuf,
                  '\0',
                  NAMEBUFSIZE);
  ACE_OS::memset (tiename,
                  '\0',
                  NAMEBUFSIZE);

  TAO_OutStream *os = this->ctx_->stream ();

  // Generate the skeleton class name which will be used to determine the TIE
  // class name.

  // We shall have a POA_ prefix only if we are at the topmost level.
  if (node->is_nested ())
    {
      ACE_OS::sprintf (namebuf,
                       "%s",
                       node->local_name ());
      ACE_OS::sprintf (tiename,
                       "%s_tie",
                       node->local_name ());
    }
  else
    {
      // We are outermost.
      ACE_OS::sprintf (namebuf,
                       "POA_%s",
                       node->local_name ());
      ACE_OS::sprintf (tiename,
                       "POA_%s_tie",
                       node->local_name ());
    }

  // Now generate the class definition.
  *os << be_nl << be_nl << "// TAO_IDL - Generated from" << be_nl
      << "// " << __FILE__ << ":" << __LINE__ << be_nl << be_nl;

  *os << "// TIE class: Refer to CORBA v2.2, Section 20.34.4" << be_nl;
  *os << "template <class T>" << be_nl;
  *os << "class " << " " << tiename << " : public " << namebuf << be_nl;
  *os << "{" << be_nl
      << "public:" << be_idt_nl
      << tiename << " (T &t);" << be_nl
      << "// the T& ctor" << be_nl
      << tiename << " (T &t, PortableServer::POA_ptr poa);" << be_nl
      << "// ctor taking a POA" << be_nl
      << tiename << " (T *tp, CORBA::Boolean release = 1);" << be_nl
      << "// ctor taking pointer and an ownership flag" << be_nl
      << tiename << " (" << be_idt << be_idt_nl
      << "T *tp," << be_nl
      << "PortableServer::POA_ptr poa," << be_nl
      << "CORBA::Boolean release = 1" << be_uidt_nl
      << ");" << be_uidt_nl
      << "// ctor with T*, ownership flag and a POA" << be_nl
      << "~" << tiename << " (void);" << be_nl
      << "// dtor" << be_nl << be_nl
      << "// TIE specific functions" << be_nl
      << "T *_tied_object (void);" << be_nl
      << "// return the underlying object" << be_nl
      << "void _tied_object (T &obj);" << be_nl
      << "// set the underlying object" << be_nl
      << "void _tied_object (T *obj, CORBA::Boolean release = 1);" << be_nl
      << "// set the underlying object and the ownership flag" << be_nl
      << "CORBA::Boolean _is_owner (void);" << be_nl
      << "// do we own it" << be_nl
      << "void _is_owner (CORBA::Boolean b);" << be_nl
      << "// set the ownership" << be_nl << be_nl
      << "// overridden ServantBase operations" << be_nl
      << "PortableServer::POA_ptr _default_POA (" << be_idt << be_idt_nl
      << "ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS" << be_uidt_nl
      << ");" << be_uidt;

  int status = 
    node->traverse_inheritance_graph (
              be_visitor_interface_tie_sh::method_helper,
              os
            );

  if (status == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_interface_tie_sh_ss::"
                         "visit_interface - "
                         "traversal of inhertance graph failed\n"),
                        -1);
    }

  *os << be_uidt_nl << be_nl
      << "private:" << be_idt_nl
      << "T *ptr_;" << be_nl
      << "PortableServer::POA_var poa_;" << be_nl
      << "CORBA::Boolean rel_;" << be_nl << be_nl
      << "// copy and assignment are not allowed" << be_nl
      << tiename << " (const " << tiename << " &);" << be_nl
      << "void operator= (const " << tiename << " &);" << be_uidt_nl
      << "};";

  return 0;
}

int
be_visitor_interface_tie_sh::visit_component (be_component *node)
{
  return this->visit_interface (node);
}

int
be_visitor_interface_tie_sh::method_helper (be_interface *,
                                            be_interface *node,
                                            TAO_OutStream *os)
{
  // Any methods from abstract parents have already been
  // "added" to the derived interface scope by the overridden 
  // visit_scope() method in be_visitor_interface, so we can skip
  // this base interface, if it is abstract.
  if (node->is_abstract ())
    {
      return 0;
    }

  be_visitor_context ctx;
  ctx.state (TAO_CodeGen::TAO_ROOT_TIE_SH);
  ctx.stream (os);
  be_visitor_interface_tie_sh visitor (&ctx);

  if (visitor.visit_scope (node) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_interface_tie_sh::"
                         "method_helper\n"), 
                        -1);
    }

  return 0;
}