| /* |
| * 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 _DECAF_UTIL_COLLECTIONS_H_ |
| #define _DECAF_UTIL_COLLECTIONS_H_ |
| |
| #include <decaf/util/Config.h> |
| |
| #include <decaf/util/Collection.h> |
| #include <decaf/util/Iterator.h> |
| #include <decaf/util/ListIterator.h> |
| #include <decaf/util/List.h> |
| #include <decaf/lang/Pointer.h> |
| |
| #include <vector> |
| #include <memory> |
| |
| namespace decaf { |
| namespace util { |
| |
| class DECAF_API Collections { |
| private: |
| |
| Collections(); |
| Collections(const Collections&); |
| Collections& operator= (const Collections&); |
| |
| public: |
| |
| /** |
| * Modifies the specified List by reversing the order of the elements. |
| * |
| * @param list |
| * The list to reverse. |
| * @throws UnsupportedOperationException |
| * when replacing an element in the List is not supported. |
| */ |
| template<typename E> |
| static void reverse(List<E>& list) { |
| int size = list.size(); |
| decaf::lang::Pointer<ListIterator<E> > front(list.listIterator()); |
| decaf::lang::Pointer<ListIterator<E> > back(list.listIterator(size)); |
| |
| for (int i = 0; i < size / 2; i++) { |
| E frontNext = front->next(); |
| E backPrev = back->previous(); |
| front->set(backPrev); |
| back->set(frontNext); |
| } |
| } |
| |
| }; |
| |
| }} |
| |
| #endif /* _DECAF_UTIL_COLLECTIONS_H_ */ |