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odbc++/errorhandler.h

/* 
   This file is part of libodbc++.
   
   Copyright (C) 1999-2000 Manush Dodunekov <manush@stendahls.net>
   
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 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
   Library General Public License for more details.
   
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/

#ifndef __ODBCXX_ERRORHANDLER_H
#define __ODBCXX_ERRORHANDLER_H

#include <odbc++/setup.h>
#include <odbc++/types.h>
#include <odbc++/threads.h>

namespace odbc {

  class ODBCXX_EXPORT ErrorHandler {
    friend class DriverManager;
    friend class DataStreamBuf;
    friend class DataStream;
  private:
    // private data
    struct PD;
    PD* pd_;

    WarningList* warnings_;
    bool collectWarnings_;
    
    //the maxumum number of warnings to contain at a time
    enum {
      MAX_WARNINGS=128
    };

  protected:
    void _postWarning(SQLWarning* w);


#if ODBCVER < 0x0300
    void _checkErrorODBC2(SQLHENV henv, 
                          SQLHDBC hdbc, 
                          SQLHSTMT hstmt, 
                          SQLRETURN r, 
                          const ODBCXX_STRING& what);
#else
    
    void _checkErrorODBC3(SQLINTEGER handleType,
                          SQLHANDLE h,
                          SQLRETURN r, const ODBCXX_STRING& what);
#endif //ODBCVER < 0x0300
    
    void _checkStmtError(SQLHSTMT hstmt,
                         SQLRETURN r, const char* what="") {

      if(r==SQL_SUCCESS_WITH_INFO || r==SQL_ERROR) {
#if ODBCVER < 0x0300

        this->_checkErrorODBC2(SQL_NULL_HENV, SQL_NULL_HDBC, hstmt,
                               r,ODBCXX_STRING_C(what));
#else
        
        this->_checkErrorODBC3(SQL_HANDLE_STMT,hstmt,r,ODBCXX_STRING_C(what));
        
#endif
      }
    }

    void _checkConError(SQLHDBC hdbc, SQLRETURN r, const char* what="") {
      if(r==SQL_SUCCESS_WITH_INFO || r==SQL_ERROR) {
#if ODBCVER < 0x0300
        
        this->_checkErrorODBC2(SQL_NULL_HENV, hdbc, SQL_NULL_HSTMT, r, 
                               ODBCXX_STRING_C(what));
        
#else
        
        this->_checkErrorODBC3(SQL_HANDLE_DBC, hdbc, r, ODBCXX_STRING_C(what));

#endif
      }
    }

    void _checkEnvError(SQLHENV henv, SQLRETURN r, const char* what="") {
      if(r==SQL_SUCCESS_WITH_INFO || r==SQL_ERROR) {
#if ODBCVER < 0x0300
        
        this->_checkErrorODBC2(henv,SQL_NULL_HDBC,SQL_NULL_HSTMT,r,
                               ODBCXX_STRING_C(what));
        
#else
        
        this->_checkErrorODBC3(SQL_HANDLE_ENV,henv,r,ODBCXX_STRING_C(what));
        
#endif
      }
    }

    ErrorHandler(bool collectWarnings =true);

  public:
    void clearWarnings();

    WarningList* getWarnings();

    virtual ~ErrorHandler();
  };

  
}; // namespace odbc

#endif

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