code: @Override
  	public void configure(Configuration parameters) {
  		this.driverName = parameters.getString(DRIVER_KEY, null);
  		this.username = parameters.getString(USERNAME_KEY, null);
  		this.password = parameters.getString(PASSWORD_KEY, null);
  		this.dbURL = parameters.getString(URL_KEY, null);
  		this.query = parameters.getString(QUERY_KEY, null);
  		this.fieldCount = parameters.getInteger(FIELD_COUNT_KEY, 0);
  		this.batchInterval = parameters.getInteger(BATCH_INTERVAL, DEFAULT_BATCH_INTERVERAL);
  
  		@SuppressWarnings("unchecked")
  		Class<Value>[] classes = new Class[this.fieldCount];
  		this.fieldClasses = classes;
  
  		for (int i = 0; i < this.fieldCount; i++) {
  			@SuppressWarnings("unchecked")
  			Class<? extends Value> clazz = (Class<? extends Value>) parameters.getClass(FIELD_TYPE_KEY + i, null);
  			if (clazz == null) {
  				throw new IllegalArgumentException("Invalid configuration for JDBCOutputFormat: "
  						+ "No type class for parameter " + i);
  			}
  			this.fieldClasses[i] = clazz;
  		}
  	}
docs: Configures this JDBCOutputFormat.
  
  @param parameters
  Configuration containing all parameters.