// -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 2 -*-

/* Copyright (C) 2007 The giomm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <glibmm/interface.h>
#include <giomm/cancellable.h>
#include <giomm/asyncresult.h>

_DEFS(giomm,gio)
_PINCLUDE(glibmm/private/object_p.h)

namespace Gio
{

class SocketAddress;

/** Enumerator type for objects that contain or generate SocketAddresses
 *
 * @newin{2,24}
 * @ingroup NetworkIO
 */
class SocketAddressEnumerator : public Glib::Object
{
  _CLASS_GOBJECT(SocketAddressEnumerator, GSocketAddressEnumerator, G_SOCKET_ADDRESS_ENUMERATOR, Glib::Object, GObject)

public:
  _WRAP_METHOD(Glib::RefPtr<SocketAddress> next(const Glib::RefPtr<Cancellable>& cancellable), g_socket_address_enumerator_next, errthrow)

  /** Retrieves the next SocketAddress from the enumerator. 
   * Note that this may block for some amount of time. (Eg, a NetworkAddress may need to do a DNS lookup before it can return an address.)
   * Use next_async() if you need to avoid blocking.
   *
   * If this enumerator is expected to yield addresses, but for some reason is unable to (eg, because of a DNS error), 
   * then the first call to next() will throw an exception. However, if the first call to next() succeeds, then any further internal errors 
   * will be ignored.
   *
   * When there are no further addresses, an exception will be thrown.
   *
   * @result A SocketAddress
   */
  Glib::RefPtr<SocketAddress> next();

  /** Asynchronously retrieves the next SocketAddress from the enumerator and then calls @a slot, 
   * which must call next_finish() to get the result.
   *
   * @param cancellable A Cancellable object which can be used to cancel the operation.
   * @param slot A callback slot to call after the resolution completes.
   */
  void next_async(const Glib::RefPtr<Cancellable>& cancellable, const SlotAsyncReady& slot);

  /** Asynchronously retrieves the next SocketAddress from the enumerator and then calls @a slot, 
   * which must call next_finish() to get the result.
   *
   * @param slot A callback slot to call after the resolution completes.
   */
  void next_async(const SlotAsyncReady& slot);
  _IGNORE(g_socket_address_enumerator_next_async)

  _WRAP_METHOD(Glib::RefPtr<SocketAddress> next_finish(const Glib::RefPtr<AsyncResult>& result), g_socket_address_enumerator_next_finish, errthrow)
};

} // namespace Gio