// -*- C++ -*-
// $Id: Key_Adapters.cpp 91628 2010-09-07 11:11:12Z johnnyw $

#include "tao/PortableServer/Key_Adapters.h"

#include "ace/ACE.h"
#include "ace/OS_NS_string.h"
#include "ace/Map_T.h"

TAO_BEGIN_VERSIONED_NAMESPACE_DECL

TAO_Incremental_Key_Generator::TAO_Incremental_Key_Generator (void)
  : counter_ (0)
{
}

int
TAO_Incremental_Key_Generator::operator() (PortableServer::ObjectId &id)
{
  // Resize to accommodate the counter.
  id.length (sizeof this->counter_);

  // Add new key data.
  ACE_OS::memcpy (id.get_buffer (),
                  &++this->counter_,
                  sizeof this->counter_);

  // Success.
  return 0;
}

////////////////////////////////////////////////////////////////////////////////

u_long
TAO_ObjectId_Hash::operator () (const PortableServer::ObjectId &id) const
{
  return ACE::hash_pjw ((const char *) id.get_buffer (),
                        id.length ());
}

////////////////////////////////////////////////////////////////////////////////

int
TAO_Ignore_Original_Key_Adapter::encode (const PortableServer::ObjectId &,
                                         const ACE_Active_Map_Manager_Key &active_key,
                                         PortableServer::ObjectId &modified_key)
{
  // Size of active key.
  size_t const active_key_size = active_key.size ();

  // Resize to accommodate both the original data and the new active key.
  modified_key.length (static_cast <CORBA::ULong> (active_key_size));

  // Copy active key data into user key.
  active_key.encode (modified_key.get_buffer ());

  // Success.
  return 0;
}

int
TAO_Ignore_Original_Key_Adapter::decode (const PortableServer::ObjectId &modified_key,
                                         ACE_Active_Map_Manager_Key &active_key)
{
  // Read off value of index and generation.
  active_key.decode (modified_key.get_buffer ());

  // Success.
  return 0;
}

int
TAO_Ignore_Original_Key_Adapter::decode (const PortableServer::ObjectId &modified_key,
                                         PortableServer::ObjectId &original_key)
{
  // Smartly copy all the data; <original_key does not own the data>.
  original_key.replace (modified_key.maximum (),
                        modified_key.length (),
                        const_cast <CORBA::Octet *>
                                   (modified_key.get_buffer ()),
                        0);

  // Success.
  return 0;
}

////////////////////////////////////////////////////////////////////////////////

int
TAO_Preserve_Original_Key_Adapter::encode (const PortableServer::ObjectId &original_key,
                                           const ACE_Active_Map_Manager_Key &active_key,
                                           PortableServer::ObjectId &modified_key)
{
  // Size of active key.
  size_t const active_key_size = active_key.size ();

  // Resize to accommodate both the original data and the new active key.
  modified_key.length (static_cast <CORBA::ULong> (active_key_size)
                         + original_key.length ());

  // Copy active key data into user key.
  active_key.encode (modified_key.get_buffer ());

  // Copy the original key after the active key.
  ACE_OS::memcpy (modified_key.get_buffer () + active_key_size,
                  original_key.get_buffer (),
                  original_key.length ());

  // Success.
  return 0;
}

int
TAO_Preserve_Original_Key_Adapter::decode (const PortableServer::ObjectId &modified_key,
                                           ACE_Active_Map_Manager_Key &active_key)
{
  // Read off value of index and generation.
  active_key.decode (modified_key.get_buffer ());

  // Success.
  return 0;
}

int
TAO_Preserve_Original_Key_Adapter::decode (const PortableServer::ObjectId &modified_key,
                                           PortableServer::ObjectId &original_key)
{
  // Size of active key.
  size_t const active_key_size = ACE_Active_Map_Manager_Key::size ();

  // Smartly copy all the data; <original_key does not own the data>.
  original_key.replace (static_cast <CORBA::ULong>
                            (modified_key.maximum () - active_key_size),
                        static_cast <CORBA::ULong>
                            (modified_key.length () - active_key_size),
                        const_cast <CORBA::Octet *>
                            (modified_key.get_buffer ()) + active_key_size,
                        0);

  // Success.
  return 0;
}

TAO_END_VERSIONED_NAMESPACE_DECL

