1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright 2007,2008 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 Library 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 "IndexInterface.h"
#include "SearchEngineInterface.h"
/// 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<std::string, bool> &engines);
/// Indicates whether a search engine or index is supported or not.
static bool isSupported(const std::string &type, bool asIndex = false);
/// Unloads all libraries.
static void unloadModules(void);
protected:
static std::map<std::string, std::string> m_types;
static std::map<std::string, void *> m_handles;
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
|
