Examples of java.sql.Driver

java.sql.Driver
An Interface to a JDBC Driver.
The JDBC Driver uses URLs to specify the location of specific data. URL format typically takes the form "xxxx:yyyy:SpecificData", where "xxxx:yyyy" is termed the subprotocol and is normally the same for all uses of a particular driver. "SpecificData" is a string which identifies the particular data source that the driver should use.

    // Set up the driver, in case it's not on the classpath
    try {
      DriverManager.getDriver(settings.url);
    } catch(SQLException e) {
      Out.debug(getClass(), "Registering " + settings.driver);
      Driver d = (Driver)JARLoader.forName(settings.driver).newInstance();
      DriverManager.registerDriver(new DriverShim(d));
    }


    // Connect
    Out.debug(getClass(), "Connecting to " + settings.url);

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    protected void clearReferences() {


        // Unregister any JDBC drivers loaded by this classloader
        Enumeration drivers = DriverManager.getDrivers();
        while (drivers.hasMoreElements()) {
            Driver driver = (Driver) drivers.nextElement();
            if (driver.getClass().getClassLoader() == this) {
                try {
                    DriverManager.deregisterDriver(driver);
                } catch (SQLException e) {
                    log.warn("SQL driver deregistration failed", e);
                }

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        // and therefore no need to create a connection
        if (isEmpty(true)) {
            return;
        }


        Driver driver = (Driver) Class.forName(dsi.getJdbcDriver()).newInstance();
        DataSource dataSource = new DriverDataSource(driver, dsi.getDataSourceUrl(), dsi
                .getUserName(), dsi.getPassword());


        runGenerator(dataSource);
    }

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        .bold(beeLine.getColorBuffer(beeLine.loc("driver-class")).getMono()));


    for (Iterator<String> i = names.iterator(); i.hasNext();) {
      String name = i.next().toString();
      try {
        Driver driver = (Driver) Class.forName(name).newInstance();
        ColorBuffer msg = beeLine.getColorBuffer()
            .pad(driver.jdbcCompliant() ? "yes" : "no", 10)
            .pad(driver.getMajorVersion() + "."
                + driver.getMinorVersion(), 8)
            .append(name);
        if (driver.jdbcCompliant()) {
          beeLine.output(msg);
        } else {
          beeLine.output(beeLine.getColorBuffer().red(msg.getMono()));
        }
      } catch (Throwable t) {

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  private Driver findRegisteredDriver(String url) {
    for (Enumeration drivers = DriverManager.getDrivers(); drivers != null
        && drivers.hasMoreElements();) {
      Driver driver = (Driver) drivers.nextElement();
      try {
        if (driver.acceptsURL(url)) {
          return driver;
        }
      } catch (Exception e) {
      }
    }

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     * 
     * @throws SQLException
     */
    public void testDeregisterDriver() throws SQLException {
        // First get one of the drivers loaded by the test
        Driver aDriver;
        aDriver = DriverManager.getDriver(baseURL4);


        // Deregister this driver
        DriverManager.deregisterDriver(aDriver);

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    static String exceptionMsg1 = "No suitable driver";


    public void testGetDriver() throws SQLException {
        for (String element : validURLs) {
            Driver validDriver = DriverManager.getDriver(element);
            assertNotNull(validDriver);
        } // end for
        
//      Comment out since it depends on the drivers providered
//        for (String element : invalidURLs) {

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    public void testGetDrivers() {
        // Load a driver manager
        Enumeration<Driver> driverList = DriverManager.getDrivers();
        int i = 0;
        while (driverList.hasMoreElements()) {
            Driver theDriver = driverList.nextElement();
            assertNotNull(theDriver);
            i++;
        } // end while


        // Check that all the drivers are in the list...

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            fail("Should throw NullPointerException.");
        } catch (NullPointerException e) {
            // expected
        } // end try


        Driver theDriver = null;
        // Load another Driver that isn't in the basic set
        Class<?> driverClass = Class.forName(EXTRA_DRIVER_NAME);
        theDriver = (Driver) driverClass.newInstance();
        DriverManager.registerDriver(theDriver);

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     */
    public void test_registerDriver_MultiTimes() throws SQLException {
        int register_count = 10;
        int deregister_count = 1;


        Driver dummy = new DummyDriver();
        DriverManager.registerDriver(new BadDummyDriver());
        for (int i = 0; i < register_count; i++) {
            DriverManager.registerDriver(dummy);
        }
        DriverManager.registerDriver(new BadDummyDriver());
        for (int i = 0; i < deregister_count; i++) {
            DriverManager.deregisterDriver(dummy);
        }
        Driver d = DriverManager.getDriver("jdbc:dummy_protocol:dummy_subname");
        assertNotNull(d);
    }

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