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/*
* Copyright 2007-2012 Fabrice Colin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _MODULE_FACTORY_H
#define _MODULE_FACTORY_H
#include <string>
#include <map>
#include "FieldMapperInterface.h"
#include "IndexInterface.h"
#include "SearchPluginProperties.h"
#include "SearchEngineInterface.h"
/// Loadable module.
class LoadableModule
{
public:
LoadableModule(ModuleProperties *pProperties,
const std::string &location, void *pHandle);
LoadableModule(const LoadableModule &other);
virtual ~LoadableModule();
LoadableModule &operator=(const LoadableModule &other);
ModuleProperties *m_pProperties;
std::string m_location;
bool m_canSearch;
bool m_canIndex;
void *m_pHandle;
};
/// Factory for search engines.
class ModuleFactory
{
public:
virtual ~ModuleFactory();
/// Loads the libraries found in the given directory.
static unsigned int loadModules(const std::string &directory);
/// Makes sure the index exists in the desired mode.
static bool openOrCreateIndex(const std::string &type, const std::string &option,
bool &obsoleteFormat, bool readOnly = true, bool overwrite = false);
/// Merges two physical indexes in a logical one.
static bool mergeIndexes(const std::string &type, const std::string &option0,
const std::string &option1, const std::string &option2);
/// Returns an index of the specified type; NULL if unavailable.
static IndexInterface *getIndex(const std::string &type, const std::string &option);
/// Returns a SearchEngine of the specified type; NULL if unavailable.
static SearchEngineInterface *getSearchEngine(const std::string &type, const std::string &option);
/// Returns the name of the given engine.
static string getSearchEngineName(const std::string &type, const std::string &option);
/// Returns all supported engines.
static void getSupportedEngines(std::map<ModuleProperties, bool> &engines);
/// Indicates whether a search engine or index is supported or not.
static bool isSupported(const std::string &type, bool asIndex = false);
/// Sets a field mapper.
static void setFieldMapper(FieldMapperInterface *pMapper);
/// Unloads all libraries.
static void unloadModules(void);
protected:
static std::map<std::string, LoadableModule> m_types;
ModuleFactory();
static IndexInterface *getLibraryIndex(const std::string &type, const std::string &option);
static SearchEngineInterface *getLibrarySearchEngine(const std::string &type, const std::string &option);
private:
ModuleFactory(const ModuleFactory &other);
ModuleFactory &operator=(const ModuleFactory &other);
};
#endif // _MODULE_FACTORY_H
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