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/* vim:set et ts=4 sts=4:
*
* libpyzy - The Chinese PinYin and Bopomofo conversion library.
*
* Copyright (c) 2008-2010 Peng Huang <shawn.p.huang@gmail.com>
*
* 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 2.1 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#ifndef __PYZY_DATABASE_H_
#define __PYZY_DATABASE_H_
#include "PhraseArray.h"
#include "String.h"
#include "Types.h"
#include "Util.h"
typedef struct sqlite3 sqlite3;
namespace PyZy {
class PinyinArray;
struct Phrase;
class SQLStmt;
typedef std::shared_ptr<SQLStmt> SQLStmtPtr;
class Database;
class Query {
public:
Query (const PinyinArray & pinyin,
size_t pinyin_begin,
size_t pinyin_len,
unsigned int option);
~Query (void);
int fill (PhraseArray &phrases, int count);
private:
const PinyinArray & m_pinyin;
size_t m_pinyin_begin;
size_t m_pinyin_len;
unsigned int m_option;
SQLStmtPtr m_stmt;
};
class Database {
public:
~Database ();
protected:
Database (const std::string & user_data_dir);
public:
static void init (const std::string & data_dir);
SQLStmtPtr query (const PinyinArray & pinyin,
size_t pinyin_begin,
size_t pinyin_len,
int m,
unsigned int option);
void commit (const PhraseArray & phrases);
void remove (const Phrase & phrase);
void conditionsDouble (void);
void conditionsTriple (void);
static void finalize (void);
static Database & instance (void)
{
if (m_instance == NULL) {
g_error ("Error: Please call InputContext::init () !");
}
return *m_instance;
}
private:
bool open (void);
bool loadUserDB (void);
bool saveUserDB (void);
void prefetch (void);
void phraseSql (const Phrase & p, String & sql);
void phraseWhereSql (const Phrase & p, String & sql);
bool executeSQL (const char *sql, sqlite3 *db = NULL);
void modified (void);
static gboolean timeoutCallback (void * data);
private:
sqlite3 *m_db; /* sqlite3 database */
String m_sql; /* sql stmt */
String m_buffer; /* temp buffer */
unsigned int m_timeout_id;
GTimer *m_timer;
String m_user_data_dir;
private:
static std::unique_ptr<Database> m_instance;
};
}; // namespace PyZy
#endif // __PYZY_DATABASE_H_
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