/*

 * libopenraw - rawfilefactory.h

 *

 * Copyright (C) 2006-2016 Hubert Figuiere

 *

 * This library is free software: you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation, either version 3 of

 * the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library.  If not, see

 * <http://www.gnu.org/licenses/>.

 */

#ifndef OR_INTERNALS_RAWFILEFACTORY_H_

#define OR_INTERNALS_RAWFILEFACTORY_H_

#include <string>

#include <map>

#include <functional>

#include "rawfile.hpp"

#include "io/stream.hpp"

namespace OpenRaw {

namespace Internals {

class RawFileFactory

{

public:

    typedef std::function<RawFile*(const IO::Stream::Ptr&)> raw_file_factory_t;

    /** the factory type for raw files

     * key is the extension. file is factory method

     */

    typedef

    std::map<RawFile::Type, raw_file_factory_t> Table;

    typedef

    std::map<std::string, RawFile::Type> Extensions;

    /** register a filetype with the factory

     * @param type the type of file

     * @param fn the factory method

     * @param ext the extension associated

     * @note it is safe to call this method with the same

     * fn and type to register a different extension

     */

    RawFileFactory(RawFile::Type type,

                   const raw_file_factory_t & fn,

                   const char * ext);

    /** access the table. Ensure that it has been constructed. */

    static Table & table();

    /** access the extensions table. Ensure that it has been constructed. */

    static Extensions & extensions();

    /** access the the list of file extenstions registered. */

    static const char **fileExtensions();

    static void registerType(RawFile::Type type,

                             const raw_file_factory_t & fn,

                             const char * ext);

    static void unRegisterType(RawFile::Type type);

};

/** accessor. This make sure the instance has been

 * constructed when needed

 */

inline RawFileFactory::Table & RawFileFactory::table()

{

    /** the factory table */

    static Table rawFactoryTable;

    return rawFactoryTable;

}

inline RawFileFactory::Extensions & RawFileFactory::extensions()

{

    /** the factory table */

    static Extensions rawExtensionsTable;

    return rawExtensionsTable;

}

}

}

#endif

/*

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  mode:c++

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  c-file-offsets:((innamespace . 0))

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  fill-column:80

  End:

*/