DBStatementCatalog.h

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/*
 * DBStatementCatalog.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 DBSTATEMENTCATALOG_H_
#define DBSTATEMENTCATALOG_H_

#include <map>
#include <string>
#include <HSEP/Dictionary.h>

using namespace std;
using namespace HSEP;

namespace HSEPData {

    class DBStatementCatalog {

        string             aInvalidString;
        string             aPath;
        StringDictionary   aCatalog;
        bool               aValid;

        DBStatementCatalog(string pPath) {
            aInvalidString = "Invalid";
            aPath  = pPath;
            aCatalog.clear();
            aValid = false;
        } // DBStatementCatalog constructor

        ~DBStatementCatalog() {
        }

        bool load();

    public:
        static DBStatementCatalog* aInstance;

        static void init(string pPath) {
            aInstance = new DBStatementCatalog(pPath);
            aInstance->load();
        }

        static void destroy() {
            if (nullptr != aInstance) {
                delete aInstance;
            }
        }

        static string& getStatementRef(string pStatementName) {
            if (aInstance->aValid) {
                return aInstance->aCatalog.ref(pStatementName);
            }
            else {
                return aInstance->aInvalidString;
            }
        } // getStatement

        static void reload() {
            if (aInstance->aValid) {
                aInstance->aCatalog.clear();
                aInstance->aValid = aInstance->load();
            }
        } // reload

    }; // DBStatementCatalog class

} // HSEPData namespace

#endif /* DBSTATEMENTCATALOG_H_ */