/*
 * Copyright (C) 2015 Tommi Maekitalo
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <tntdb/connect.h>
#include <tntdb/statement.h>
#include <tntdb/serialization.h>

#include <cxxtools/serializationinfo.h>
#include <cxxtools/log.h>

#include <iostream>

struct MyObject
{
    unsigned id;
    int a;
    std::string b;
};

void operator>>= (const cxxtools::SerializationInfo& si, MyObject& obj)
{
  si.getMember("id") >>= obj.id;
  si.getMember("a") >>= obj.a;
  si.getMember("b") >>= obj.b;
}

int main(int argc, char* argv[])
{
    try
    {
        log_init();  // Logging should be initialized always; reads log.xml or log.properties to configure logging

        if (argc <= 1)
        {
            std::cerr << "Usage: " << argv[0] << " dburl\n";
            return -1;
        }

        // connect to database
        std::string database = argv[1];
        tntdb::Connection db = tntdb::connect(database);

        tntdb::Statement sel = db.prepare(
            "select id, a, b"
            " from myobjects");

        for (tntdb::Statement::const_iterator it = sel.begin(); it != sel.end(); ++it)
        {
            // create empty object
            MyObject obj;

            // *it returns a tntdb::Row with the result
            // The operator >>= uses the deserialization operator of MyObject to extract
            // the data. The names of the columns must match the members defined in the
            // deserialization operator.
            *it >>= obj;

            // output the data
            std::cout << "id=" << obj.id << " a=" << obj.a << " b=\"" << obj.b << "\"\n";
        }
    }
    catch (const std::exception& e)
    {
        std::cerr << e.what() << std::endl;
    }
}
