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/*
 * This file is part of Log4Jdbc.
 *
 * Log4Jdbc 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.
 *
 * Log4Jdbc 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 Log4Jdbc.  If not, see .
 *
 */
package fr.ms.sql;

import java.io.PrintWriter;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Enumeration;

/**
 *
 * @see Marco4J
 *
 *
 * @author Marco Semiao
 *
 */
public class JdbcDriverManagerImpl implements JdbcDriverManager {

    public void setLogWriter(final PrintWriter out) {
	DriverManager.setLogWriter(out);
    }

    public Enumeration getDrivers() {
	return DriverManager.getDrivers();
    }

    public void registerDriver(final Driver driver) throws SQLException {
	final boolean driverLoad = driverLoad(driver);
	if (!driverLoad) {
	    DriverManager.registerDriver(driver);
	}
    }

    private static boolean driverLoad(final Driver driver) {
	final Class clazz = driver.getClass();
	return driverLoad(clazz);
    }

    private static boolean driverLoad(final Class clazz) {
	final Enumeration drivers = DriverManager.getDrivers();

	while (drivers.hasMoreElements()) {
	    final java.sql.Driver driver = (java.sql.Driver) drivers.nextElement();

	    final Class c = driver.getClass();
	    if (c.equals(clazz)) {
		return true;
	    }
	}
	return false;
    }
}