/* vim:set et ts=4 sts=4: * * libpyzy - The Chinese PinYin and Bopomofo conversion library. * * Copyright (c) 2008-2010 Peng Huang * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #ifndef __PYZY_DATABASE_H_ #define __PYZY_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 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 PhoneticContext::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 m_instance; }; }; // namespace PyZy #endif // __PYZY_DATABASE_H_