//
// $Id$
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    arglist.cpp
//
// = DESCRIPTION
//    Visitor generating code for the parameter list of the Operation signature.
//
// = AUTHOR
//    Aniruddha Gokhale
//
// ============================================================================

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

#include "be_visitor_operation.h"

ACE_RCSID(be_visitor_operation, arglist, "$Id$")


// ************************************************************
//   operation visitor  to generate the argument list.
//   We have separated code generation for this from the 4 main
//   visitors to avoid code duplication and tight coupling
// ************************************************************

be_visitor_operation_arglist::be_visitor_operation_arglist (be_visitor_context
                                                            *ctx)
  : be_visitor_scope (ctx)
{
}

be_visitor_operation_arglist::~be_visitor_operation_arglist (void)
{
}

int
be_visitor_operation_arglist::visit_operation (be_operation *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  os->incr_indent (0); // these are for pretty printing
  os->incr_indent (0);
  *os << " (\n";

  // all we do is hand over code generation to our scope
  if (this->visit_scope (node) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_operation_arglist::"
                         "visit_operation - "
                         "codegen for scope failed\n"),
                        -1);
    }

  // last argument - is always CORBA::Environment
  os->indent ();
  *os << "CORBA::Environment &_tao_environment\n";
  os->decr_indent ();
  *os << " )";
  switch (this->ctx_->state ())
    {
    case TAO_CodeGen::TAO_OPERATION_ARGLIST_CH:
    case TAO_CodeGen::TAO_OPERATION_ARGLIST_COLLOCATED_SH:
      *os << ";\n";
      break;
    case TAO_CodeGen::TAO_OPERATION_ARGLIST_SH:
      // each method is pure virtual in the server header
      *os << " = 0;\n";
      break;
    default:
      *os << "\n";
    }

  os->decr_indent (0);
  return 0;
}

int
be_visitor_operation_arglist::visit_argument (be_argument *node)
{
  // get the visitor that will dump the argument's mapping in the operation
  // signature.
  be_visitor_context ctx (*this->ctx_);

  // first grab the interface definition inside which this operation is
  // defined. We need this since argument types may very well be declared
  // inside the scope of the interface node. In such cases, we would like to
  // generate the appropriate relative scoped names.
  be_operation *op = this->ctx_->be_scope_as_operation ();
  if (!op)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "Bad operation\n"),
                        -1);
    }

  // We need the interface node in which this operation was defined. However,
  // if this operation node was an attribute node in disguise, we get this
  // information from the context
  be_interface *intf;
  intf = this->ctx_->attribute ()
    ? be_interface::narrow_from_scope (this->ctx_->attribute ()->defined_in ())
    : be_interface::narrow_from_scope (op->defined_in ());

  if (!intf)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "Bad interface\n"),
                        -1);
    }
  ctx.scope (intf); // set new scope

  switch (this->ctx_->state ())
    {
    case TAO_CodeGen::TAO_OPERATION_ARGLIST_CH:
      ctx.state (TAO_CodeGen::TAO_ARGUMENT_ARGLIST_CH);
      break;
    case TAO_CodeGen::TAO_OPERATION_ARGLIST_OTHERS:
    case TAO_CodeGen::TAO_OPERATION_ARGLIST_SH:
    case TAO_CodeGen::TAO_OPERATION_ARGLIST_COLLOCATED_SH:
      ctx.state (TAO_CodeGen::TAO_ARGUMENT_ARGLIST_OTHERS);
      break;
    default:
      {
        ACE_ERROR_RETURN ((LM_ERROR,
                           "(%N:%l) be_visitor_arglist::"
                           "visit_argument - "
                           "Bad context\n"),
                          -1);
      }
    }

  // grab a visitor
  be_visitor *visitor = tao_cg->make_visitor (&ctx);
  if (!visitor)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "Bad visitor\n"),
                        -1);
    }
  if (node->accept (visitor) == -1)
    {
      delete visitor;
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"

                         "visit_argument - "
                         "codegen for arglist failed\n"),
                        -1);
    }
  delete visitor;
  return 0;
}