/*
 * Copyright 2007, Ingo Weinhold, ingo_weinhold@gmx.de.
 * All rights reserved. Distributed under the terms of the MIT license.
 */
#ifndef ATTRIBUTE_ITERATOR_H
#define ATTRIBUTE_ITERATOR_H

#include <SupportDefs.h>

#include <util/DoublyLinkedList.h>


class Attribute;
class Node;

class AttributeIterator : public DoublyLinkedListLinkImpl<AttributeIterator> {
public:
        AttributeIterator(Node *node = NULL);
        ~AttributeIterator();

        status_t SetTo(Node *node);
        void Unset();

        Node *GetNode() const { return fNode; }

        status_t Suspend();
        status_t Resume();
        bool IsSuspended() const { return fSuspended; }

        status_t GetNext(Attribute **attribute);
        Attribute *GetCurrent() const { return fAttribute; }

        status_t Rewind();

private:
        void SetCurrent(Attribute *attribute, bool isNext);

private:
        friend class Node;

private:
        Node                                                    *fNode;
        Attribute                                               *fAttribute;
        bool                                                    fSuspended;
        bool                                                    fIsNext;
        bool                                                    fDone;
};

#endif  // ATTRIBUTE_ITERATOR_H