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Subject.hpp

00001 #if !defined(__SUBJECT_HPP) 00002 #define __SUBJECT_HPP 00003 00004 /* 00005 CoreLinux++ 00006 Copyright (C) 2000 CoreLinux Consortium 00007 00008 The CoreLinux++ Library is free software; you can redistribute it and/or 00009 modify it under the terms of the GNU Library General Public License as 00010 published by the Free Software Foundation; either version 2 of the 00011 License, or (at your option) any later version. 00012 00013 The CoreLinux++ Library Library is distributed in the hope that it will 00014 be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 Library General Public License for more details. 00017 00018 You should have received a copy of the GNU Library General Public 00019 License along with the GNU C Library; see the file COPYING.LIB. If not, 00020 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 00021 Boston, MA 02111-1307, USA. 00022 */ 00023 00024 #if !defined(__COMMON_HPP) 00025 #include <Common.hpp> 00026 #endif 00027 00028 #if !defined(__EVENT_HPP) 00029 #include <Event.hpp> 00030 #endif 00031 00032 #if !defined(__ITERATOR_HPP) 00033 #include <Iterator.hpp> 00034 #endif 00035 00036 namespace corelinux 00037 { 00038 DECLARE_CLASS( Subject ); 00039 DECLARE_CLASS( Observer ); 00040 00046 class Subject 00047 { 00048 public: 00049 00050 // 00051 // Constructors and destructor 00052 // 00053 00058 Subject( void ) ; 00059 00065 Subject( SubjectCref ); 00066 00068 00069 virtual ~Subject( void ); 00070 00071 // 00072 // Operator overloads 00073 // 00074 00076 00077 SubjectRef operator=( SubjectCref ); 00078 00080 00081 bool operator==( SubjectCref ) const; 00082 00084 00085 bool operator!=( SubjectCref ) const; 00086 // 00087 // Accessors 00088 // 00089 00090 00091 // 00092 // Mutators 00093 // 00094 00101 virtual void addObserver( ObserverPtr, Event<Identifier> * ) 00102 throw ( NullPointerException ) = 0 ; 00103 00110 virtual void removeObserver( ObserverPtr ) 00111 throw ( NullPointerException ) = 0 ; 00112 00119 virtual void removeObserver( ObserverPtr, Event<Identifier> * ) 00120 throw ( NullPointerException ) = 0 ; 00121 00122 // 00123 // Iterator Factory methods 00124 // 00130 virtual Iterator<ObserverPtr> *createIterator( void ) = 0; 00131 00139 virtual Iterator<ObserverPtr> *createIterator( Event<Identifier> * ) 00140 throw ( NullPointerException ) = 0 ; 00141 00148 virtual void destroyIterator( Iterator<ObserverPtr> * ) 00149 throw ( NullPointerException ) = 0 ; 00150 00151 protected: 00152 00153 // 00154 // Activity 00155 // 00156 00164 virtual void notifyObservers( Event<Identifier> * ) 00165 throw ( NullPointerException ) ; 00166 00174 virtual void notifyAllObservers( Event<Identifier> * ) 00175 throw ( NullPointerException ) ; 00176 private: 00177 00178 }; 00179 } 00180 00181 #endif // if !defined(__SUBJECT_HPP) 00182 00183 /* 00184 Common rcs information do not modify 00185 $Author: frankc $ 00186 $Revision: 1.1 $ 00187 $Date: 2000/05/07 14:53:13 $ 00188 $Locker: $ 00189 */ 00190 00191

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