// $Id$

#include "tao/AnyTypeCode/Any_Unknown_IDL_Type.h"
#include "tao/AnyTypeCode/Marshal.h"
#include "tao/AnyTypeCode/TypeCode.h"
#include "tao/Valuetype_Adapter.h"
#include "tao/ORB_Core.h"
#include "tao/SystemException.h"
#include "tao/CDR.h"
#include "tao/debug.h"

#include "ace/Dynamic_Service.h"
#include "ace/OS_NS_string.h"

ACE_RCSID (AnyTypeCode,
           Any_Unknown_IDL_Type,
           "$Id$")

TAO_BEGIN_VERSIONED_NAMESPACE_DECL

TAO::Unknown_IDL_Type::LOCK const
TAO::Unknown_IDL_Type::lock_i (void)
{
  static LOCK base_lock_ (new ACE_Lock_Adapter<TAO_SYNCH_MUTEX>());
  return base_lock_;
}

TAO::Unknown_IDL_Type::Unknown_IDL_Type (CORBA::TypeCode_ptr tc,
                                         TAO_InputCDR &cdr)
  : TAO::Any_Impl (0, tc, true)
  , lock_ (lock_i ())
  , cdr_ (static_cast<ACE_Message_Block*>(0), lock_.get ())
{
  try
    {
      this->_tao_decode (cdr);
    }
  catch (::CORBA::Exception const &)
    {
    }
}

TAO::Unknown_IDL_Type::Unknown_IDL_Type (CORBA::TypeCode_ptr tc)
  : TAO::Any_Impl (0, tc, true)
  , lock_ (lock_i ())
  , cdr_ (static_cast<ACE_Message_Block*>(0), lock_.get ())
{
}

TAO::Unknown_IDL_Type::~Unknown_IDL_Type (void)
{
}

CORBA::Boolean
TAO::Unknown_IDL_Type::marshal_value (TAO_OutputCDR & cdr)
{
  try
    {
      // We don't want the rd_ptr to move, in case we are shared by
      // another Any, so we use this to copy the state, not the buffer.
      TAO_InputCDR for_reading (this->cdr_);

      TAO::traverse_status const status =
        TAO_Marshal_Object::perform_append (this->type_,
                                            &for_reading,
                                            &cdr);

      if (status != TAO::TRAVERSE_CONTINUE)
        {
          return false;
        }
    }
  catch (::CORBA::Exception const &)
    {
      return false;
    }

  return true;
}

const void *
TAO::Unknown_IDL_Type::value (void) const
{
  return this->cdr_.start ();
}

void
TAO::Unknown_IDL_Type::free_value (void)
{
  ::CORBA::release (this->type_);
}

TAO_InputCDR &
TAO::Unknown_IDL_Type::_tao_get_cdr (void)
{
  return this->cdr_;
}

int
TAO::Unknown_IDL_Type::_tao_byte_order (void) const
{
  return this->cdr_.byte_order ();
}
void
TAO::Unknown_IDL_Type::_tao_decode (TAO_InputCDR & cdr)
{
  // @@ (JP) The following code depends on the fact that
  //         TAO_InputCDR does not contain chained message blocks,
  //         otherwise <begin> and <end> could be part of
  //         different buffers!

  // This will be the start of a new message block.
  char const * const begin = cdr.rd_ptr ();

  // Skip over the next argument.
  TAO::traverse_status const status =
    TAO_Marshal_Object::perform_skip (this->type_, &cdr);

  if (status != TAO::TRAVERSE_CONTINUE)
    {
      throw ::CORBA::MARSHAL ();
    }

  // This will be the end of the new message block.
  char const * const end = cdr.rd_ptr ();

  // The ACE_CDR::mb_align() call can shift the rd_ptr by up to
  // ACE_CDR::MAX_ALIGNMENT - 1 bytes. Similarly, the offset adjustment
  // can move the rd_ptr by up to the same amount. We accommodate
  // this by including 2 * ACE_CDR::MAX_ALIGNMENT bytes of additional
  // space in the message block.
  size_t const size = end - begin;

  ACE_Message_Block new_mb (size + 2 * ACE_CDR::MAX_ALIGNMENT);

  ACE_CDR::mb_align (&new_mb);
  ptrdiff_t offset = ptrdiff_t (begin) % ACE_CDR::MAX_ALIGNMENT;

  if (offset < 0)
    {
      offset += ACE_CDR::MAX_ALIGNMENT;
    }

  new_mb.rd_ptr (offset);
  new_mb.wr_ptr (offset + size);

  ACE_OS::memcpy (new_mb.rd_ptr (), begin, size);

  this->cdr_.reset (&new_mb, cdr.byte_order ());
  this->cdr_.char_translator (cdr.char_translator ());
  this->cdr_.wchar_translator (cdr.wchar_translator ());

  this->cdr_.set_repo_id_map (cdr.get_repo_id_map ());
  this->cdr_.set_codebase_url_map (cdr.get_codebase_url_map ());
  this->cdr_.set_value_map (cdr.get_value_map ());

  // Take over the GIOP version, the input cdr can have a different
  // version then our current GIOP version.
  ACE_CDR::Octet major_version;
  ACE_CDR::Octet minor_version;
  cdr.get_version (major_version, minor_version);
  this->cdr_.set_version (major_version, minor_version);
}

CORBA::Boolean
TAO::Unknown_IDL_Type::to_object (CORBA::Object_ptr & obj) const
{
  try
    {
      CORBA::TCKind const kind = TAO::unaliased_kind (this->type_);

      if (kind != CORBA::tk_objref)
        {
          return false;
        }

      // We don't want the rd_ptr to move, in case we are shared by
      // another Any, so we use this to copy the state, not the buffer.
      TAO_InputCDR for_reading (this->cdr_);

      return for_reading >> obj;
    }
  catch (::CORBA::Exception const &)
    {
    }

  return false;
}

CORBA::Boolean
TAO::Unknown_IDL_Type::to_value (CORBA::ValueBase* & val) const
{
  try
    {
      CORBA::TCKind const kind = TAO::unaliased_kind (this->type_);

      if (kind != CORBA::tk_value)
        {
          return false;
        }

      TAO_ORB_Core *orb_core = this->cdr_.orb_core ();
      if (orb_core == 0)
        {
          orb_core = TAO_ORB_Core_instance ();

          if (TAO_debug_level > 0)
            {
              ACE_DEBUG ((LM_WARNING,
                          ACE_TEXT ("TAO (%P|%t) WARNING: extracting ")
                          ACE_TEXT ("valuetype using default ORB_Core\n")));
            }
        }

      // We don't want the rd_ptr to move, in case we are shared by
      // another Any, so we use this to copy the state, not the buffer.
      TAO_InputCDR for_reading (this->cdr_);

      TAO_Valuetype_Adapter * const adapter =
        orb_core->valuetype_adapter ();

      return adapter->stream_to_value (for_reading, val);
    }
  catch (::CORBA::Exception const &)
    {
    }

  return false;
}

CORBA::Boolean
TAO::Unknown_IDL_Type::to_abstract_base (CORBA::AbstractBase_ptr & obj) const
{
  try
    {
      CORBA::TCKind const kind = TAO::unaliased_kind (this->type_);

      if (kind != CORBA::tk_abstract_interface)
        {
          return false;
        }

      TAO_ORB_Core *orb_core = this->cdr_.orb_core ();
      if (orb_core == 0)
        {
          orb_core = TAO_ORB_Core_instance ();

          if (TAO_debug_level > 0)
            {
              ACE_DEBUG ((LM_WARNING,
                          ACE_TEXT ("TAO (%P|%t) WARNING: extracting ")
                          ACE_TEXT ("abstract base using default ORB_Core\n")));
            }
        }

      // We don't want the rd_ptr to move, in case we are shared by
      // another Any, so we use this to copy the state, not the buffer.
      TAO_InputCDR for_reading (this->cdr_);

      TAO_Valuetype_Adapter * const adapter =
        orb_core->valuetype_adapter ();
      CORBA::Boolean ret = adapter->stream_to_abstract_base (for_reading, obj);

      return ret;
    }
   catch (::CORBA::Exception const &)
    {
    }

  return false;
}

TAO_END_VERSIONED_NAMESPACE_DECL