Code example for Properties

      { 
        throw new NullPointerException();
      } 
 
      this.jdbcConnectString = jdbcConnectString;
      this.jdbcProperties = (Properties) jdbcProperties.clone();
    } 
 
    public boolean equals(final Object o)
    { 
      if (this == o)
      { 
        return true; 
      } 
      if (o == null || getClass() != o.getClass())
      { 
        return false; 
      } 
 
      final DriverConnectionKey that = (DriverConnectionKey) o;
 
      if (!jdbcConnectString.equals(that.jdbcConnectString))
      { 
        return false; 
      } 
      if (!jdbcProperties.equals(that.jdbcProperties))
      { 
        return false; 
      } 
 
      return true; 
    } 
 
    public int hashCode() 
    { 
      int result = jdbcConnectString.hashCode();
      result = 31 * result + jdbcProperties.hashCode();
      return result;
    } 
  } 
 
  /** 
   * Implementation of {@link DataSource} which calls the good ol' 
   * {@link java.sql.DriverManager}. 
   */ 
  private static class DriverManagerDataSource implements DataSource
  { 
    private String jdbcConnectString;
    private PrintWriter logWriter;
    private int loginTimeout;
    private Properties jdbcProperties;
 
    public DriverManagerDataSource(final String jdbcConnectString,
                                   final Properties properties)
    { 
      if (jdbcConnectString == null)
      { 
        throw new NullPointerException();
      } 
      if (properties == null)
      { 
        throw new NullPointerException();
      } 
      this.jdbcConnectString = jdbcConnectString;
      this.jdbcProperties = (Properties) properties.clone();
    } 
 
    public Logger getParentLogger() throws SQLFeatureNotSupportedException
    { 
      throw new SQLFeatureNotSupportedException();