org.supercsv.cellprocessor

Class Optional

java.lang.Object

org.supercsv.cellprocessor.CellProcessorAdaptor

org.supercsv.cellprocessor.ConvertNullTo

org.supercsv.cellprocessor.Optional

All Implemented Interfaces:

BoolCellProcessor, CellProcessor, DateCellProcessor, DoubleCellProcessor, LongCellProcessor, StringCellProcessor

public class Optional
extends ConvertNullTo

This processor is used to indicate that a cell is optional, and will avoid executing further processors if it encounters null. It is a simple customization of ConvertNullTo.

Prior to version 2.0.0, this processor returned null for empty String (""), but was updated because Tokenizer now reads empty columns as null. It also means that Optional can now be used when writing as well (instead of using ConvertNullTo("")).

Author:

Kasper B. Graversen, James Bassett

Field Summary

Fields inherited from class org.supercsv.cellprocessor.CellProcessorAdaptor

next

Constructor Summary

Constructors

Constructor and Description
Optional() Constructs a new Optional processor, which when encountering null will return null, for all other values it will return the value unchanged.
Optional(CellProcessor next) Constructs a new Optional processor, which when encountering null will return null , for all other values it will call the next processor in the chain.

Method Summary

Methods inherited from class org.supercsv.cellprocessor.ConvertNullTo

execute

Methods inherited from class org.supercsv.cellprocessor.CellProcessorAdaptor

toString, validateInputNotNull

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Optional

public Optional()

Constructs a new Optional processor, which when encountering null will return null, for all other values it will return the value unchanged.

Optional

public Optional(CellProcessor next)

Constructs a new Optional processor, which when encountering null will return null , for all other values it will call the next processor in the chain.

Parameters:

next - the next CellProcessor in the chain

Throws:

NullPointerException - if next is null