UtlObservable.h

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//
// Copyright (C) 2006 SIPfoundry Inc.
// Licensed by SIPfoundry under the LGPL license.
//
// Copyright (C) 2006 Pingtel Corp.  All rights reserved.
// Licensed to SIPfoundry under a Contributor Agreement.
//
// $$

class UtlObservable;

class UtlObserver
{
public:

    virtual ~UtlObserver(){};

    virtual void onNotify(UtlObservable* subject, int code, void *pUserData) = 0;
};

class UtlObservable
{
public:
   virtual ~UtlObservable(){};

    virtual void registerObserver(UtlObserver* observer) = 0;

    virtual void removeObserver(UtlObserver* observer) = 0;
protected:
    
    virtual void notify(int code, void *pUserData) = 0;

};