sqlite.hpp
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- /*
- * ===========================================================================
- * PRODUCTION $Log: sqlite.hpp,v $
- * PRODUCTION Revision 1000.0 2003/10/29 20:49:25 gouriano
- * PRODUCTION PRODUCTION: IMPORTED [ORIGINAL] Dev-tree R1.1
- * PRODUCTION
- * ===========================================================================
- */
- #ifndef SQLITE___SQLITE__HPP
- #define SQLITE___SQLITE__HPP
- /* $Id: sqlite.hpp,v 1000.0 2003/10/29 20:49:25 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's official duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- *
- * Authors: Mike DiCuccio
- *
- * File Description:
- *
- */
- #include <corelib/ncbiobj.hpp>
- // predeclaration saves us from polluting the global namespace with
- // all of sqlite
- struct sqlite;
- struct sqlite_vm;
- BEGIN_NCBI_SCOPE
- //
- // struct to handle SQLite's callback mechanism
- //
- struct ISQLiteCallback
- {
- virtual ~ISQLiteCallback() {}
- virtual int Callback(int argc, char** argv, char** cols) = 0;
- };
- class CSQLiteQuery;
- //
- // main SQLite interface class
- //
- class NCBI_XSQLITE_EXPORT CSQLite : public CObject
- {
- public:
- // create a new SQLite interface class around a file. This file will
- // optionally be deleted on destruction (i.e., temporary out-of-core
- // database)
- CSQLite(const string& dbname, bool delete_file = false);
- // create a new SQLite interface class for an in-memory database
- CSQLite();
- virtual ~CSQLite();
- // Open a database. Databases with the name ':memory:' are opened as
- // in-core databases. The delete flag is optionally used to specify
- // that a call to Close() will destroy the file as well.
- void Open(const string& dbname, bool delete_file = false);
- // close the current database
- void Close();
- // compile a query for execution
- CSQLiteQuery* Compile(const string& query) const;
- // execute our commands, no callback
- void Execute(const string& str);
- // execute our commands, but ping a callback in the referenced class
- void Execute(const string& str, ISQLiteCallback& cb);
- // get the row index / key for the last insert statement. This returns -1
- // if the database is invalid
- int GetLastRowID(void);
- // returns the number of rows affected by the last execute statement
- int GetRowsAffected(void);
- // interrupt the current execution
- void StopExecute(void);
- // test to see if a file is a SQLite database
- static bool IsValidDB(const string& str);
- private:
- // abstract DB pointer
- sqlite* m_DB;
- // name of the file we use
- string m_Filename;
- // flag: should we delete the file on destruction?
- bool m_DeleteFile;
- // forbidden
- CSQLite(const CSQLite&);
- CSQLite& operator=(const CSQLite&);
- };
- ///////////////////////////////////////////////////////////////////////////
- //
- // class CSQLiteQuery is a simple interface to a query object
- class NCBI_XSQLITE_EXPORT CSQLiteQuery : public CObject
- {
- friend class CSQLite;
- public:
- ~CSQLiteQuery();
- // retrieve the next row from our compiled query, returning false if there
- // isn't one
- bool NextRow(int& count, const char **& data, const char **& cols) const;
- protected:
- sqlite* m_DB;
- mutable sqlite_vm* m_Query;
- // ctor protected - created only by CSQLite
- CSQLiteQuery(sqlite_vm* query);
- // clean-up
- void x_CleanUp() const;
- };
- END_NCBI_SCOPE
- /*
- * ===========================================================================
- * $Log: sqlite.hpp,v $
- * Revision 1000.0 2003/10/29 20:49:25 gouriano
- * PRODUCTION: IMPORTED [ORIGINAL] Dev-tree R1.1
- *
- * Revision 1.1 2003/09/29 12:24:40 dicuccio
- * Initial revision
- *
- * ===========================================================================
- */
- #endif // SQLITE___SQLITE__HPP