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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef SD_SLIDESORTER_ENUMERATION_HXX
      21             : #define SD_SLIDESORTER_ENUMERATION_HXX
      22             : 
      23             : #include <memory>
      24             : 
      25             : namespace sd { namespace slidesorter { namespace model {
      26             : 
      27             : 
      28             : /** Interface to generic enumerations.  Designed to operate on shared
      29             :     pointers.  Therefore GetNextElement() returns T and not T&.
      30             : */
      31             : template <class T>
      32           0 : class Enumeration
      33             : {
      34             : public:
      35           0 :     virtual ~Enumeration() {}
      36             : 
      37             :     virtual bool HasMoreElements (void) const = 0;
      38             :     /** Returns T instead of T& so that it can handle shared pointers.
      39             :     */
      40             :     virtual T GetNextElement (void) = 0;
      41             :     virtual void Rewind (void) = 0;
      42             :     virtual ::std::auto_ptr<Enumeration<T> > Clone (void) = 0;
      43             : };
      44             : 
      45             : } } } // end of namespace ::sd::slidesorter::model
      46             : 
      47             : #endif
      48             : 
      49             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */