dbconnection.hxx

vovida的软交换

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
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 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */

#ifndef DBCONNECTION_HXX
#define DBCONNECTION_HXX

#include <string>
#include <vector>
#include <map>
#include "DBTypes.h"

/** 
 * This is the base class from which each concrete database 
 * connection class derives. 
 */

/// Forward declare DBResultset
class DBResultset;

/// DBConnection class- Abstract client interface class
class DBConnection
{
    public:
        /// Constructor
        DBConnection(){};

        /// Destructor
        virtual ~DBConnection(){};

  /*
   * The next functions provide a direct SQL interface to the database
   */

  /** 
   * Executes a 'SELECT' query.
   * @param Sqlcmd string of SQL command 
   * @return resultset object
   */
   
  virtual DBResultset* DBSQLSelect (const string& Sqlcmd) = 0;
  
  /**
   * Executes a given SQL query.
   * @param Sqlcmd string of SQL command 
   * @return boolean to tell is the query has failed
   */

  virtual bool DBSQLExec(const string& Sqlcmd) = 0;

  /** 
   * Executes an 'INSERT' query.
   * @param Sqlcmd string of SQL command 
   * @return boolean to tell is the query has failed
   */

  virtual bool DBSQLInsert(const string& Sqlcmd) = 0;
  
  /** 
   * Executes an 'UPDATE' query.
   * @param Sqlcmd string of SQL command 
   * @return boolean to tell is the query has failed
   */  
  
  virtual bool DBSQLUpdate(const string& Sqlcmd) = 0;
  
  /** 
   * Executes an 'DELETE' query.
   * @param Sqlcmd string of SQL command 
   * @return boolean to tell is the query has failed
   */ 
  
  virtual bool DBSQLDelete(const string& Sqlcmd) = 0;

  /** 
   * Checks the status of a connection.
   * @return true if the connection is OK, false otherwise.
   */ 

  virtual bool checkDBCon() = 0;

};
#endif