Package org.supercsv.cellprocessor
Class ConvertNullTo
- java.lang.Object
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- org.supercsv.cellprocessor.CellProcessorAdaptor
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- org.supercsv.cellprocessor.ConvertNullTo
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- 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
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Field Summary
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Fields inherited from class org.supercsv.cellprocessor.CellProcessorAdaptor
next
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Constructor Summary
Constructors Constructor 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.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method 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
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Constructor Detail
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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
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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 nullnext
- the next CellProcessor in the chain- Throws:
java.lang.NullPointerException
- if next is null
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Method Detail
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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 interfaceCellProcessor
- Parameters:
value
- the value to be processedcontext
- the CSV context- Returns:
- the result of cell processor execution
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