109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
/*
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* File: LSQConnection.h
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* Author: Saleem Edah-Tally - nmset@yandex.com
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* License : LGPL version 2.1
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* Copyright Saleem Edah-Tally, M. D. - © 2014
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*
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* Created on 25 mai 2014, 16:07
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*/
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#ifdef USE_LIBSQ
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#ifndef LSQCONNECTION_H
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#define LSQCONNECTION_H
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#include <sqlite3.h>
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#include <vector>
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#include <wx/wx.h>
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#include "LConnection.h"
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/**
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* SQLite namespace.
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*
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* Please note USE_LIBSQ pre-processor directive must be defined to include the SQLite backend.
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*/
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namespace SQ
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{
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#define CNSQMC wxString(_T("CNSQM"))
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class SQresult;
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/**
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Minimalist class managing an SQLite3 connection; derives from LConnection.
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*/
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class LSQConnection : public LConnection
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{
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public:
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LSQConnection();
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/**
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*
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* @param newInfo : connection information. A file path, or memory/temporary database string instructions.
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*/
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LSQConnection(const wxString& newInfo);
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/**
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* The connection is closed in the destructor.
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*/
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virtual ~LSQConnection();
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/**
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*
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* @return the last backend error message, may be NULL.
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*/
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const char* GetLastLibMessage() const;
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/**
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* Establishes a new connection, creating the SQLIte database if necessary.
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* Does nothing if a connection already exists.
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* @return true if a new connection is established, or if a connection already esists. False on error.
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*/
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bool Connect();
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/**
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*
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* @return a pointer to the sqlite3 real database pointer.
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*/
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void * Get() const;
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/**
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* Checks if the sqlite3 pointer is not NULL.
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* @return true if the sqlite3 pointer is not NULL.
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*/
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bool IsValid() const;
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/**
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* Closes the connection. Error message pointer is set to NULL.
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*/
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void Close();
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/**
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* Calls sqlite3_get_table and returns rows from a SELECT query.
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* @param newSql a valid SQL statement.
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* @return an untyped pointer to an SQresult referencing the data, or NULL if error.
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*/
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void * ExecuteSQL(const wxString& newSql);
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/**
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* Intended for database actions that do not fetch table rows. Calls sqlite3_exec.
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* @param newSql : : a valid SQL statement.
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* @return true on success, false otherwise.
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*/
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bool ExecuteUpdateSQL(const wxString& newSql);
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/**
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*
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* @param col : unused
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* @return an insert row identifier is always returned, even if the table does not have an autoincrement column.
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*/
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const wxAny GetReturnedValue(const unsigned int unused) const;
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private:
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sqlite3 * m_conn;
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char * m_errMsg;
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/**
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* Forwards SQLite messages to InformLibMessage
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* @param
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*/
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void InformSQMessage(const char * SQmsg) const;
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wxArrayPtrVoid evtHandlers;
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/**
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* Informs application that registers LConnectionEvent handlers here.
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* @param msg
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*/
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void InformLibMessage(const LInformation& msg) const;
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};
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}
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#endif /* LSQCONNECTION_H */
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#endif
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