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/*
* Copyright 2011 Google Inc. All Rights Reserved.
*
* Licensed 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 SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
#define SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
#include "sfntly/port/refcount.h"
// Interface of Java iterator.
// This is a forward read-only iterator that represents java.util.Iterator<E>
namespace sfntly {
template <typename ReturnType, typename ContainerBase>
class Iterator : public virtual RefCount {
public:
virtual ~Iterator() {}
virtual ContainerBase* container_base() = 0;
protected:
Iterator() {}
NO_COPY_AND_ASSIGN(Iterator);
};
template <typename ReturnType, typename Container,
typename ContainerBase = Container>
class PODIterator : public Iterator<ReturnType, ContainerBase>,
public RefCounted< PODIterator<ReturnType, Container> > {
public:
explicit PODIterator(Container* container) : container_(container) {}
virtual ~PODIterator() {}
virtual ContainerBase* container_base() {
return static_cast<ContainerBase*>(container_);
}
virtual bool HasNext() = 0;
virtual ReturnType Next() = 0;
virtual void Remove() {
#if !defined (SFNTLY_NO_EXCEPTION)
// Default to no support.
throw UnsupportedOperationException();
#endif
}
protected:
Container* container() { return container_; }
private:
Container* container_; // Dumb pointer is used to avoid circular ref-counting
};
template <typename ReturnType, typename Container,
typename ContainerBase = Container>
class RefIterator : public Iterator<ReturnType, ContainerBase>,
public RefCounted< RefIterator<ReturnType, Container> > {
public:
explicit RefIterator(Container* container) : container_(container) {}
virtual ~RefIterator() {}
virtual ContainerBase* container_base() {
return static_cast<ContainerBase*>(container_);
}
virtual bool HasNext() = 0;
CALLER_ATTACH virtual ReturnType* Next() = 0;
virtual void Remove() {
#if !defined (SFNTLY_NO_EXCEPTION)
// Default to no support.
throw UnsupportedOperationException();
#endif
}
protected:
Container* container() { return container_; }
private:
Container* container_; // Dumb pointer is used to avoid circular ref-counting
};
} // namespace sfntly
#endif // SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
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