// src/backend/module.hh - Copyright 2005, 2006, University
//               of Padova, dept. of Pure and Applied
//               Mathematics
//
// This file is part of SGPEMv2.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// SGPEMv2 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

#include "config.h"

#include "module.hh"

using namespace sgpem;

Module::Module(const Glib::ustring& identifier) throw(InvalidPluginException) :
  Glib::Module(identifier), 
  _enabled(false), 
  _id(identifier),
  on_init_ptr(NULL), 
  on_exit_ptr(NULL), 
  describe_ptr(NULL),
  get_name_ptr(NULL),
  get_author_ptr(NULL),
  get_version_ptr(NULL)
{ 
  // Type-safeness here is an optional, as always. :-)
  std::string prefix = "sgpem__Plugin__";
  if(!(get_symbol(prefix + "on_init",     (void*&) on_init_ptr) && 
       get_symbol(prefix + "on_exit",     (void*&) on_exit_ptr) && 
       get_symbol(prefix + "describe",    (void*&) describe_ptr) &&
       get_symbol(prefix + "get_name",    (void*&) get_name_ptr) && 
       get_symbol(prefix + "get_author",  (void*&) get_author_ptr) &&
       get_symbol(prefix + "get_version", (void*&) get_version_ptr)))
    throw InvalidPluginException("incomplete/wrong exported interface");
}
  

void 
Module::set_enabled(bool enabled)
{
  if(_enabled == enabled)
    return;
  
  if(enabled)
    on_init_ptr();
  else
    on_exit_ptr();
  
  _enabled = enabled;
}

Glib::ustring 
Module::get_name() const
{
  return get_name_ptr();
}

Glib::ustring 
Module::get_author() const
{
  return get_author_ptr();
}

Glib::ustring 
Module::describe() const
{
  return describe_ptr();
}

float 
Module::get_version() const
{
  return get_version_ptr();
}

bool 
Module::get_enabled() const
{
  return _enabled;
}