//
  // Delegate.h
  //
  // $Id:\; //poco/1.3/Foundation/include/Poco/Delegate.h\#2$
  //
  // Library: Foundation
  // Package: Events
  // Module:  Delegate
  //
  // Implementation of the Delegate template.
  //
  // Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef  Foundation_Delegate_INCLUDED
  define  Foundation_Delegate_INCLUDED
  
  include "Poco/Foundation.h"
  include "Poco/AbstractDelegate.h"
  include "Poco/FunctionDelegate.h"
  include "Poco/Expire.h"
  
  namespace Poco {
  
  template <class TObj, class TArgs, bool withSender=true> 
  class Delegate: public AbstractDelegate<TArgs>
  {
  public:
          typedef void (TObj::*NotifyMethod)(const void*, TArgs&);
  
          Delegate(TObj* obj, NotifyMethod method):
                  AbstractDelegate<TArgs>(obj),
                  _receiverObject(obj), 
                  _receiverMethod(method)
          {
          }
  
          Delegate(const Delegate& delegate):
                  AbstractDelegate<TArgs>(delegate),
                  _receiverObject(delegate._receiverObject),
                  _receiverMethod(delegate._receiverMethod)
          {
          }
  
          ~Delegate()
          {
          }
          
          Delegate& operator = (const Delegate& delegate)
          {
                  if (&delegate != this)
                  {
                          this->_pTarget        = delegate._pTarget;
                          this->_receiverObject = delegate._receiverObject;
                          this->_receiverMethod = delegate._receiverMethod;
                  }
                  return *this;
          }
  
          bool notify(const void* sender, TArgs& arguments)
          {
                  (_receiverObject->*_receiverMethod)(sender, arguments);
                  return true; // a "standard" delegate never expires
          }
  
          AbstractDelegate<TArgs>* clone() const
          {
                  return new Delegate(*this);
          }
  
  protected:
          TObj*        _receiverObject;
          NotifyMethod _receiverMethod;
  
  private:
          Delegate();
  };
  
  template <class TObj, class TArgs> 
  class Delegate// a "standard" delegate never expires
          }
  
          AbstractDelegate<TArgs>* clone() const
          {
                  return new Delegate(*this);
          }
  
  protected:
          TObj*        _receiverObject;
          NotifyMethod _receiverMethod;
  
  private:
          Delegate();
  };
  
  template <class TObj, class TArgs>
  static Delegate<TObj, TArgs, true> delegate(TObj* pObj, void (TObj::*NotifyMethod)(const void*, TArgs&))
  {
          return Delegate<TObj, TArgs, true>(pObj, NotifyMethod);
  }
  
  template <class TObj, class TArgs>
  static Delegate<TObj, TArgs, false> delegate(TObj* pObj, void (TObj::*NotifyMethod)(TArgs&))
  {
          return Delegate<TObj, TArgs, false>(pObj, NotifyMethod);
  }
  
  template <class TObj, class TArgs>
  static Expire<TArgs> delegate(TObj* pObj, void (TObj::*NotifyMethod)(const void*, TArgs&), Timestamp::TimeDiff expireMillisecs)
  {
          return Expire<TArgs>(Delegate<TObj, TArgs, true>(pObj, NotifyMethod), expireMillisecs);
  }
  
  template <class TObj, class TArgs>
  static Expire<TArgs> delegate(TObj* pObj, void (TObj::*NotifyMethod)(TArgs&), Timestamp::TimeDiff expireMillisecs)
  {
          return Expire<TArgs>(Delegate<TObj, TArgs, false>(pObj, NotifyMethod), expireMillisecs);
  }
  
  template <class TArgs>
  static Expire<TArgs> delegate(void (*NotifyMethod)(const void*, TArgs&), Timestamp::TimeDiff expireMillisecs)
  {
          return Expire<TArgs>(FunctionDelegate<TArgs, true, true>(NotifyMethod), expireMillisecs);
  }
  
  template <class TArgs>
  static Expire<TArgs> delegate(void (*NotifyMethod)(void*, TArgs&), Timestamp::TimeDiff expireMillisecs)
  {
          return Expire<TArgs>(FunctionDelegate<TArgs, true, false>(NotifyMethod), expireMillisecs);
  }
  
  template <class TArgs>
  static Expire<TArgs> delegate(void (*NotifyMethod)(TArgs&), Timestamp::TimeDiff expireMillisecs)
  {
          return Expire<TArgs>(FunctionDelegate<TArgs, false>( NotifyMethod), expireMillisecs);
  }
  
  template <class TArgs>
  static FunctionDelegate<TArgs, true, true> delegate(void (*NotifyMethod)(const void*, TArgs&))
  {
          return FunctionDelegate<TArgs, true, true>(NotifyMethod);
  }
  
  template <class TArgs>
  static FunctionDelegate<TArgs, true, false> delegate(void (*NotifyMethod)(void*, TArgs&))
  {
          return FunctionDelegate<TArgs, true, false>(NotifyMethod);
  }
  
  template <class TArgs>
  static FunctionDelegate<TArgs, false> delegate(void (*NotifyMethod)(TArgs&))
  {
          return FunctionDelegate<TArgs, false>(NotifyMethod);
  }
  
  } // namespace Poco
  
  endif