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/******************************************************************************
 * Project:  libsidx - A C API wrapper around libspatialindex
 * Purpose:	 Declarations to support stream loading via C API
 * Author:   Howard Butler, hobu.inc@gmail.com
 ******************************************************************************
 * Copyright (c) 2009, Howard Butler
 *
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
******************************************************************************/
 
#pragma once

#include "sidx_export.h"

class SIDX_DLL DataStream : public SpatialIndex::IDataStream
{
public:
    DataStream(int (*readNext)(SpatialIndex::id_type* id, double **pMin, double **pMax, uint32_t *nDimension, const uint8_t **pData, uint32_t *nDataLength));
    ~DataStream();

    SpatialIndex::IData* getNext();
    bool hasNext();

    uint32_t size();
    void rewind();

protected:
    SpatialIndex::RTree::Data* m_pNext;
    SpatialIndex::id_type m_id;

private:
    int (*iterfunct)(SpatialIndex::id_type *id, double **pMin, double **pMax, uint32_t *nDimension, const uint8_t **pData, uint32_t *nDataLength);
    
    bool readData();
    bool m_bDoneReading;

};