/**
   Support for creating a JDBC Connection
 */

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

class JDBCConnection
{

    public static boolean loadDriver(String driverClassPath)
    {
        boolean driverLoaded = true;
        try {
            Class.forName( driverClassPath );
        }
        catch (ClassNotFoundException e) {
            System.out.println("loadDriver: could not load " + driverClassPath );
            driverLoaded = false;
        }
        return driverLoaded;
    } // loadDriver


    /**
       Establish a connection to the database server.
    */
    public static Connection getConnection(String user,
                                     String password,
                                     String url,
                                     String dbName )
    {
        String connectDescriptor = url + dbName;

        Connection conn = null;
        try {
            conn = DriverManager.getConnection(connectDescriptor, user, password);
        }
        catch (SQLException e) {
            System.out.println("getConnection: Could not establish a connection" + 
                               " to database server");
            System.out.println("getConnection: using connection string: " + 
                               connectDescriptor );
            System.out.println("getConnection: SQLException = " + e.getMessage() );
        }

        return conn;
    } // getConnection


    public static boolean closeConnection( Connection conn )
    {
        boolean closeOK = true;
        if (conn != null) {
            try {
                conn.close();
            }
            catch (SQLException e) {
                System.out.println("closeConnection: could not close connection");
                closeOK = false;
            }
        }
        return closeOK;
    } // closeConnection

} // myJdbcCheckup