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/* vim:set et ts=4 sts=4:
*
* ibus-pinyin - The Chinese PinYin engine for IBus
*
* Copyright (c) 2008-2010 Peng Huang <shawn.p.huang@gmail.com>
*
* 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __DATABASE_H_
#define __DATABASE_H_
#include "PyZyUtil.h"
#include "PyZyString.h"
#include "PyZyTypes.h"
#include "PyZyPhraseArray.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,
guint pinyin_begin,
guint pinyin_len,
guint option);
~Query (void);
gint fill (PhraseArray &phrases, gint count);
private:
const PinyinArray & m_pinyin;
guint m_pinyin_begin;
guint m_pinyin_len;
guint m_option;
SQLStmtPtr m_stmt;
};
class Database {
public:
~Database ();
protected:
Database (const std::string & user_data_dir);
public:
static void init (void);
static void init (const std::string & data_dir);
SQLStmtPtr query (const PinyinArray & pinyin,
guint pinyin_begin,
guint pinyin_len,
gint m,
guint 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 PhoneticContext::init () !");
}
return *m_instance;
}
private:
gboolean open (void);
gboolean loadUserDB (void);
gboolean saveUserDB (void);
void prefetch (void);
void phraseSql (const Phrase & p, String & sql);
void phraseWhereSql (const Phrase & p, String & sql);
gboolean executeSQL (const gchar *sql, sqlite3 *db = NULL);
void modified (void);
static gboolean timeoutCallback (gpointer data);
private:
sqlite3 *m_db; /* sqlite3 database */
String m_sql; /* sql stmt */
String m_buffer; /* temp buffer */
guint m_timeout_id;
GTimer *m_timer;
String m_user_data_dir;
private:
static std::unique_ptr<Database> m_instance;
};
}; // namespace PyZy
#endif // __DATABASE_H_