| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #ifndef SD_SLIDESORTER_ENUMERATION_HXX |
| #define SD_SLIDESORTER_ENUMERATION_HXX |
| |
| #include <memory> |
| |
| namespace sd { namespace slidesorter { namespace model { |
| |
| |
| /** Interface to generic enumerations. Designed to operate on shared |
| pointers. Therefore GetNextElement() returns T and not T&. |
| */ |
| template <class T> |
| class Enumeration |
| { |
| public: |
| virtual ~Enumeration (void) {} |
| |
| virtual bool HasMoreElements (void) const = 0; |
| /** Returns T instead of T& so that it can handle shared pointers. |
| */ |
| virtual T GetNextElement (void) = 0; |
| virtual void Rewind (void) = 0; |
| virtual ::std::auto_ptr<Enumeration<T> > Clone (void) = 0; |
| }; |
| |
| } } } // end of namespace ::sd::slidesorter::model |
| |
| #endif |
