DBDrvLib.h

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/*
 * DBDrvLib.h
 *
 *  This file is part of the HausmiSEP project
 *
 *  Copyright (C) 2012, 2013 Marco Alvarado (malvcr@gmail.com)
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef DBDRVLIB_H_
#define DBDRVLIB_H_

#include <HSEPData/ErrorCode.h>
#include <HSEP/Library.h>
#include <cstddef>
#include <cstring>

#include <map>

using namespace std;

typedef HSEPData::DBEnvironment* (*createEnvironmentType)();

namespace HSEPData {

    class DBDrvLib : public HSEP::Library {
        createEnvironmentType fCreateEnvironment;
    public:
        DBDrvLib(string& pPath) : Library("DBDrvLib",pPath) {
            if (valid()) {
                /*
                 * The dynamic method is only retrieved once to be used many times with the
                 * getEnvironment method.
                 */
                union {
                    void*                 aPOSIX;
                    createEnvironmentType aCPP;
                } vMethod;

                memset((void*)&vMethod,0,(long int)sizeof(vMethod)); // this way, we have clear information containers

                string vCreateEnvironmentStr = string("createEnvironment");

                vMethod.aPOSIX     = getMethodPtr(vCreateEnvironmentStr);
                fCreateEnvironment = vMethod.aCPP;

            }
        } // constructor

        DBEnvironment* getEnvironmentPtr(string& pConnStrRef, string& pUserRef, string& pPasswordRef, string& pSchemaRef) {

            DBEnvironment* vResult = nullptr;
            if (valid()) {
                vResult = fCreateEnvironment();

                if (EC::OK == vResult->connect(pConnStrRef,pUserRef,pPasswordRef)) {
                    vResult->setSchema(pSchemaRef);
                }
                else {
                    setLastError(vResult->lastErrorRef());
                    delete vResult;
                    vResult = nullptr;
                }

            }
            return vResult;
        }
    }; // DBDrvLib class

    typedef map<string,DBDrvLib*> DBDrvLibMap;

    typedef DBDrvLibMap::iterator DBDrvLibMapIterator;

} // HSEPData namespace

#endif /* DBDRVLIB_H_ */