/*
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* Copyright 2011 Google Inc. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
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#define SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
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#include "sfntly/port/refcount.h"
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// Interface of Java iterator.
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// This is a forward read-only iterator that represents java.util.Iterator<E>
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namespace sfntly {
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template <typename ReturnType, typename ContainerBase>
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class Iterator : public virtual RefCount {
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public:
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virtual ~Iterator() {}
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virtual ContainerBase* container_base() = 0;
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protected:
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Iterator() {}
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NO_COPY_AND_ASSIGN(Iterator);
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};
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template <typename ReturnType, typename Container,
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typename ContainerBase = Container>
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class PODIterator : public Iterator<ReturnType, ContainerBase>,
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public RefCounted< PODIterator<ReturnType, Container> > {
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public:
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explicit PODIterator(Container* container) : container_(container) {}
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virtual ~PODIterator() {}
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virtual ContainerBase* container_base() {
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return static_cast<ContainerBase*>(container_);
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}
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virtual bool HasNext() = 0;
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virtual ReturnType Next() = 0;
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virtual void Remove() {
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#if !defined (SFNTLY_NO_EXCEPTION)
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// Default to no support.
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throw UnsupportedOperationException();
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#endif
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}
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protected:
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Container* container() { return container_; }
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private:
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Container* container_; // Dumb pointer is used to avoid circular ref-counting
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};
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template <typename ReturnType, typename Container,
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typename ContainerBase = Container>
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class RefIterator : public Iterator<ReturnType, ContainerBase>,
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public RefCounted< RefIterator<ReturnType, Container> > {
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public:
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explicit RefIterator(Container* container) : container_(container) {}
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virtual ~RefIterator() {}
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virtual ContainerBase* container_base() {
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return static_cast<ContainerBase*>(container_);
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}
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virtual bool HasNext() = 0;
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CALLER_ATTACH virtual ReturnType* Next() = 0;
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virtual void Remove() {
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#if !defined (SFNTLY_NO_EXCEPTION)
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// Default to no support.
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throw UnsupportedOperationException();
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#endif
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}
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protected:
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Container* container() { return container_; }
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private:
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Container* container_; // Dumb pointer is used to avoid circular ref-counting
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};
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} // namespace sfntly
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#endif // SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
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