1 /* 2 * Copyright 2011 Google Inc. All Rights Reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_ 18 #define SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_ 19 20 #include "sfntly/port/refcount.h" 21 22 // Interface of Java iterator. 23 // This is a forward read-only iterator that represents java.util.Iterator<E> 24 25 namespace sfntly { 26 27 template <typename ReturnType, typename ContainerBase> 28 class Iterator : public virtual RefCount { 29 public: 30 virtual ~Iterator() {} 31 virtual ContainerBase* container_base() = 0; 32 33 protected: 34 Iterator() {} 35 NO_COPY_AND_ASSIGN(Iterator); 36 }; 37 38 template <typename ReturnType, typename Container, 39 typename ContainerBase = Container> 40 class PODIterator : public Iterator<ReturnType, ContainerBase>, 41 public RefCounted< PODIterator<ReturnType, Container> > { 42 public: 43 explicit PODIterator(Container* container) : container_(container) {} 44 virtual ~PODIterator() {} 45 virtual ContainerBase* container_base() { 46 return static_cast<ContainerBase*>(container_); 47 } 48 49 virtual bool HasNext() = 0; 50 virtual ReturnType Next() = 0; 51 virtual void Remove() { 52 #if !defined (SFNTLY_NO_EXCEPTION) 53 // Default to no support. 54 throw UnsupportedOperationException(); 55 #endif 56 } 57 58 protected: 59 Container* container() { return container_; } 60 61 private: 62 Container* container_; // Dumb pointer is used to avoid circular ref-counting 63 }; 64 65 template <typename ReturnType, typename Container, 66 typename ContainerBase = Container> 67 class RefIterator : public Iterator<ReturnType, ContainerBase>, 68 public RefCounted< RefIterator<ReturnType, Container> > { 69 public: 70 explicit RefIterator(Container* container) : container_(container) {} 71 virtual ~RefIterator() {} 72 virtual ContainerBase* container_base() { 73 return static_cast<ContainerBase*>(container_); 74 } 75 76 virtual bool HasNext() = 0; 77 CALLER_ATTACH virtual ReturnType* Next() = 0; 78 virtual void Remove() { 79 #if !defined (SFNTLY_NO_EXCEPTION) 80 // Default to no support. 81 throw UnsupportedOperationException(); 82 #endif 83 } 84 85 protected: 86 Container* container() { return container_; } 87 88 private: 89 Container* container_; // Dumb pointer is used to avoid circular ref-counting 90 }; 91 92 } // namespace sfntly 93 94 #endif // SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_ 95
