DiskStorageManager.h

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/******************************************************************************
 * Project:  libspatialindex - A C++ library for spatial indexing
 * Author:   Marios Hadjieleftheriou, [email protected]
 ******************************************************************************
 * Copyright (c) 2002, Marios Hadjieleftheriou
 *
 * 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
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
******************************************************************************/
 
#pragma once
 
namespace SpatialIndex
{
        namespace StorageManager
        {
                class DiskStorageManager : public SpatialIndex::IStorageManager
                {
                public:
                        DiskStorageManager(Tools::PropertySet&);
                        virtual ~DiskStorageManager();
 
                        virtual void flush();
                        virtual void loadByteArray(const id_type page, uint32_t& len, byte** data);
                        virtual void storeByteArray(id_type& page, const uint32_t len, const byte* const data);
                        virtual void deleteByteArray(const id_type page);
 
                private:
                        class Entry
                        {
                        public:
                                uint32_t m_length;
                                std::vector<id_type> m_pages;
                        };
 
                protected:
                        std::fstream m_dataFile;
                        std::fstream m_indexFile;
                        uint32_t m_pageSize;
                        id_type m_nextPage;
                        std::set<id_type> m_emptyPages;
                        std::map<id_type, Entry*> m_pageIndex;
 
                        byte* m_buffer;
                }; // DiskStorageManager
        }
}