TAO/TAO_IDL/be/be_visitor_valuetype/valuetype_init_ch.cpp


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//
// $Id$
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    valuetype_init_ch.cpp
//
// = DESCRIPTION
//    Visitor generating code for Valuetypes factory in the client header
//    (see IDL to C++ mapping). Based on ptc/00-01-02.
//
// = AUTHOR
//   Boris Kolpackov <bosk@ipmce.ru>
//
//
// ============================================================================

#include        "idl.h"
#include        "idl_extern.h"
#include        "be.h"

#include "be_visitor_valuetype.h"

ACE_RCSID(be_visitor_valuetype, valuetype_init_ch, "$Id$")

be_visitor_valuetype_init_ch::be_visitor_valuetype_init_ch (
    be_visitor_context *ctx
  )
  : be_visitor_valuetype_init (ctx)
{
}

be_visitor_valuetype_init_ch::~be_visitor_valuetype_init_ch (void)
{
}

int
be_visitor_valuetype_init_ch::visit_valuetype (be_valuetype *node)
{

  if (node->is_abstract_valuetype ())
  {
    return 0;
  }

  // There are three possible situations.
  // (1) If there is no initializers but at least one operation.
  //     In this case we don't need to bother about factory.
  //
  // (2) There are no (operations or initializers) (i.e. only state
  //     members) then we need a concrete type-specific factory
  //     class whose create_for_unmarshal creates OBV_ class.
  //
  // (3) There is at least one operation and at least one initializer.
  //     In this case we need to generate abstract factory class.

  FactoryStyle factory_style = determine_factory_style (node);

  if(factory_style == FS_NO_FACTORY) // nothing to do
    {
      return 0; // bail out
    }

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

  // Generate the ifdef macro for the _init class.
  os.gen_ifdef_macro (node->flat_name (), "_init");


  //@@ If I'm generating concrete class I need a RefCounter
  os << "class " << be_global->stub_export_macro ()
     << " " << node->local_name ()
     << "_init : public virtual CORBA_ValueFactoryBase" << be_nl;

  // generate the body
  os << "{" << be_nl
     << "public:" << be_idt_nl;

  if(factory_style == FS_CONCRETE_FACTORY)
    {
      // public ctor
      os << node->local_name () << "_init ();" << be_nl;
    }

  // virtual public dtor
  os << "virtual ~" << node->local_name () << "_init ();" << be_nl;


  // custom methods
  os << be_nl;

  if (this->visit_valuetype_scope (node) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_valuetype_init_ch::"
                         "visit_valuetype - "
                         "codegen for scope failed\n"),
                        -1);
    }

  os << be_nl;

  // generate _downcast method
  os << "static " << node->local_name () << "_init* "
     << "_downcast (CORBA_ValueFactoryBase* );" << be_nl;

  if(factory_style == FS_CONCRETE_FACTORY)
    {
      //@@ Boris: create_for_unmarshal is still public...
      // generate create_for_unmarshal
      os << be_nl
         << "virtual CORBA_ValueBase* "
         << "create_for_unmarshal" << " "
         << "(void);" << be_nl;
    }

  os << be_nl;

    // propriate extensions
  os << "// TAO-specific extensions"
     << be_uidt_nl
     << "public:" << be_idt_nl;

  os << "virtual const char* tao_repository_id (void);\n";

  if(factory_style == FS_ABSTRACT_FACTORY)
    {
      // protected ctor
      os << be_uidt_nl
         << "protected:" << be_idt_nl;

      os << node->local_name () << "_init ();";

    }

  os << be_uidt_nl << "};" << be_nl;

  // Generate the endif macro.
  os.gen_endif ();

  return 0;
}

int
be_visitor_valuetype_init_ch::visit_factory (be_factory *node)
{

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

  be_valuetype *vt =
    be_valuetype::narrow_from_decl (this->ctx_->scope ());


  // STEP I: Generate preambule.
  os << "virtual " << vt->local_name () << "* ";

  // STEP 2: Generate the operation name.
  os << node->local_name ();

  // STEP 3: Generate the argument list with the appropriate mapping. For these
  // we grab a visitor that generates the parameter listing.
  be_visitor_context ctx (*this->ctx_);
  ctx.state (TAO_CodeGen::TAO_VALUETYPE_INIT_ARGLIST_CH);
  be_visitor* visitor = tao_cg->make_visitor (&ctx);

  if (!visitor)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_valuetype_init_ch::"
                         "visit_factory - "
                         "Bad visitor to argument list\n"),
                        -1);
    }

  if (node->accept (visitor) == -1)
    {
      delete visitor;
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_valuetype_init_arglist__ch::"
                         "visit_operation - "
                         "codegen for argument list failed\n"),
                        -1);
    }

  delete visitor;

  // make pure virtual
  os << " = 0;" << be_nl;

  return 0;
}