org.supercsv.cellprocessor

Class ConvertNullTo

java.lang.Object

org.supercsv.cellprocessor.CellProcessorAdaptor

org.supercsv.cellprocessor.ConvertNullTo

All Implemented Interfaces:

BoolCellProcessor, CellProcessor, DateCellProcessor, DoubleCellProcessor, LongCellProcessor, StringCellProcessor

Direct Known Subclasses:

Optional

public class ConvertNullTo
extends CellProcessorAdaptor
implements BoolCellProcessor, DateCellProcessor, DoubleCellProcessor, LongCellProcessor, StringCellProcessor

This processor returns a specified default value if the input is null. This is handy when writing partially filled beans, maps and arrays, as for each column a default value can be specified.

To return the String "" when a null is encountered use new ConvertNullTo("\"\"");

If you need further processing of the value in case the value is not null, you can link the processor with other processors such as new ConvertNullTo("\"\"", new Truncate(3))

Since:

1.20

Author:

Kasper B. Graversen

Field Summary

Fields inherited from class org.supercsv.cellprocessor.CellProcessorAdaptor

next

Constructor Summary

Constructors

Constructor and Description
ConvertNullTo(java.lang.Object returnValue) Constructs a new ConvertNullTo processor, which returns a specified default value if the input is null.
ConvertNullTo(java.lang.Object returnValue, CellProcessor next) Constructs a new ConvertNullTo processor, which returns a specified default value if the input is null.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	execute(java.lang.Object value, CsvContext context) This method is invoked by the framework when the processor needs to process data or check constraints.

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

ConvertNullTo

public ConvertNullTo(java.lang.Object returnValue)

Constructs a new ConvertNullTo processor, which returns a specified default value if the input is null.

Parameters:

returnValue - the value to return if the input is null

ConvertNullTo

public ConvertNullTo(java.lang.Object returnValue,
                     CellProcessor next)

Constructs a new ConvertNullTo processor, which returns a specified default value if the input is null. If the input is not null, then the next processor is executed.

Parameters:

returnValue - the value to return if the input is null

next - the next CellProcessor in the chain

Throws:

java.lang.NullPointerException - if next is null

Method Detail

execute

public java.lang.Object execute(java.lang.Object value,
                                CsvContext context)

This method is invoked by the framework when the processor needs to process data or check constraints.

Specified by:

execute in interface CellProcessor

Parameters:

value - the value to be processed

context - the CSV context

Returns:

the result of cell processor execution