package Factory;

import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class SimpleDataSource {
    
    /**
      Initializes the data source.
      @param fileName the name of the property file that
      contains the database driver, url, username and password
     */
    public static void init(String fileName)
    throws IOException, ClassNotFoundException {
        Properties props = new Properties();
        FileInputStream in = new FileInputStream(fileName);
        props.load(in);
        
        String driver = props.getProperty("jdbc.driver");
        url = props.getProperty("jdbc.url");
        username = props.getProperty("jdbc.username");
        password = props.getProperty("jdbc.password");
        Class.forName(driver);
    }
    
    /**
      Gets a connection to the database.
      @return the database connection
     */
    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection(url, username, password);
    }
    
    private static String url;
    private static String username;
    private static String password;
}