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/*
* Ekiga -- A VoIP and Video-Conferencing application
* Copyright (C) 2000-2009 Damien Sandras <dsandras@seconix.com>
* This program 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. This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Ekiga is licensed under the GPL license and as a special exception, you
* have permission to link or otherwise combine this program with the
* programs OPAL, OpenH323 and PWLIB, and distribute the combination, without
* applying the requirements of the GNU GPL to the OPAL, OpenH323 and PWLIB
* programs, as long as you do follow the requirements of the GNU GPL for all
* the rest of the software thus combined.
*/
/*
* services.h - description
* ------------------------------------------
* begin : written in 2007 by Julien Puydt
* copyright : (c) 2007 by Julien Puydt
* description : declaration of a service object
*
*/
#ifndef __SERVICES_H__
#define __SERVICES_H__
/* We want to register some named services to a central location : this is
* it!
*/
#include <boost/smart_ptr.hpp>
#include <boost/optional.hpp>
#include <list>
#include <string>
#include <boost/signals.hpp>
#include <boost/bind.hpp>
namespace Ekiga
{
/**
* @defgroup services Services
* @{
*/
struct Service
{
virtual ~Service () {}
virtual const std::string get_name () const = 0;
virtual const std::string get_description () const = 0;
/* beware that if you check the result directly (in an if, or passing it
* through a function, the obtained value will be wether or not the value
* is available, and not the value itself!
*
* To be more specific, you're supposed to:
* val = foo.get_bool_property ("bar");
* if (val) {
* <do something with *val> (notice *val not val!)
* }
*/
virtual boost::optional<bool> get_bool_property (const std::string) const;
virtual boost::optional<int> get_int_property (const std::string) const;
virtual boost::optional<std::string> get_string_property (const std::string) const;
};
typedef boost::shared_ptr<Service> ServicePtr;
class ServiceCore
{
public:
ServiceCore () {}
~ServiceCore ();
bool add (ServicePtr service);
ServicePtr get (const std::string name);
template<typename T>
boost::shared_ptr<T> get (const std::string name)
{ return boost::dynamic_pointer_cast<T> (get (name)); }
void dump (std::ostream &stream) const;
boost::signal1<void, ServicePtr> service_added;
private:
typedef std::list<ServicePtr> services_type;
services_type services;
};
typedef boost::shared_ptr<ServiceCore> ServiceCorePtr;
class BasicService: public Service
{
public:
BasicService (const std::string name_,
const std::string description_):
name(name_), description(description_)
{}
const std::string get_name () const
{ return name; }
const std::string get_description () const
{ return description; }
private:
std::string name;
std::string description;
};
/**
* @}
*/
};
#endif
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