/*
 * Copyright 2017, Chế Vũ Gia Hy, cvghy116@gmail.com.
 * Copyright 2011, Jérôme Duval, korli@users.berlios.de.
 * This file may be used under the terms of the MIT License.
 */
#ifndef ATTRIBUTEITERATOR_H
#define ATTRIBUTEITERATOR_H


#include "BTree.h"
#include "Inode.h"

//! Used to traverse through attributes of a given inode
class AttributeIterator {
public:
                        //! Constructs an AttributeIterator object for Inode object *inode
                                                                AttributeIterator(Inode* inode);
                                                                ~AttributeIterator();
                        //! Check if fIterator pointer is valid
                        status_t                        InitCheck();

                        /*! Copy details of next Attribute into *name and *_nameLength
                         * \param[out] name name of the current attribute
                         * \param[out] _nameLength length of name
                         * \return B_OK on success, B_ENTRY_NOT_FOUND otherwise
                        */
                        status_t                        GetNext(char* name, size_t* _nameLength);
                        //! Rewind the iterator to the first attribute of the node
                        status_t                        Rewind();
private:
                        //! Value of current offset from beginning of Attribute list
                        uint64                          fOffset;
                        //! Pointer to Inode object corresponding to AttributeIterator
                        Inode*                          fInode;
                        //! Pointer to beginning of current Attribute
                        TreeIterator*           fIterator;
};


#endif  // ATTRIBUTEITERATOR_H