fr.da2i.lup1.util.DaoProvider.java Source code

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Here is the source code for fr.da2i.lup1.util.DaoProvider.java

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/**
 * This file is part of lup1.
 *
 * lup1 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.
 * 
 * lup1 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 lup1.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * @author Edouard CATTEZ <edouard.cattez@sfr.fr> (La 7 Production)
 */
package fr.da2i.lup1.util;

import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Paths;
import java.sql.SQLException;
import java.util.Properties;

import com.google.common.io.Resources;
import com.j256.ormlite.dao.Dao;
import com.j256.ormlite.dao.DaoManager;
import com.j256.ormlite.jdbc.JdbcPooledConnectionSource;
import com.j256.ormlite.support.ConnectionSource;

import fr.da2i.lup1.io.IO;

/**
 * Fournit l'accs aux diffrents DAOs.
 */
public class DaoProvider {

    private static DaoProvider daoProvider;

    private ConnectionSource conSource;

    private DaoProvider() {
        try {
            URL url = Resources.getResource("config.properties");
            Properties props = IO.loadProperties(Paths.get(url.toURI()));
            Class.forName(props.getProperty("db.driver"));
            conSource = new JdbcPooledConnectionSource(props.getProperty("db.uri"),
                    props.getProperty("db.username"), props.getProperty("db.password"));
        } catch (IllegalArgumentException | ClassNotFoundException | URISyntaxException | SQLException e) {
            throw new DaoException(e);
        }
    }

    private static DaoProvider getInstance() {
        if (daoProvider == null) {
            daoProvider = new DaoProvider();
        }
        return daoProvider;
    }

    public static ConnectionSource getConnectionSource() {
        return getInstance().conSource;
    }

    public static synchronized <D extends Dao<T, ?>, T> D getDao(Class<T> daoObject) {
        try {
            return DaoManager.createDao(getConnectionSource(), daoObject);
        } catch (SQLException e) {
            throw new DaoException("No dao found for " + daoObject);
        }
    }

}