Class IsElementOf

java.lang.Object

org.supercsv.cellprocessor.CellProcessorAdaptor

org.supercsv.cellprocessor.constraint.IsElementOf

All Implemented Interfaces:

BoolCellProcessor, CellProcessor, DateCellProcessor, DoubleCellProcessor, LongCellProcessor, StringCellProcessor

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

This processor ensures that the input value is an element of a Collection. It differs from IsIncludedIn as the Collection is modifiable, so it can be used with other processors such as Collector to enforce referential integrity.

Since:

2.1.0

Field Summary

Fields

Modifier and Type	Field	Description
private final Collection<Object>	collection

Fields inherited from class CellProcessorAdaptor

next

Constructor Summary

Constructors

Constructor	Description
IsElementOf(Collection<Object> collection)	Constructs a new IsElementOf, which ensures that the input value is an element of a Collection.
IsElementOf(Collection<Object> collection, CellProcessor next)	Constructs a new IsElementOf, which ensures that the input value is an element of a Collection, then calls the next processor in the chain.

Method Summary

Modifier and Type	Method	Description
private static void	checkPreconditions(Collection<Object> collection)	Checks the preconditions for creating a new IsElementOf processor.
Object	execute(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 CellProcessorAdaptor

toString, validateInputNotNull

Methods inherited from class Object

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

Field Details

collection

private final Collection<Object> collection

Constructor Details

IsElementOf

public IsElementOf(Collection<Object> collection)

Constructs a new IsElementOf, which ensures that the input value is an element of a Collection.

Parameters:

collection - the collection to check

Throws:

NullPointerException - if collection is null

IsElementOf

public IsElementOf(Collection<Object> collection,
 CellProcessor next)

Constructs a new IsElementOf, which ensures that the input value is an element of a Collection, then calls the next processor in the chain.

Parameters:

collection - the collection to check

next - the next processor in the chain

Throws:

NullPointerException - if collection or next is null

Method Details

checkPreconditions

private static void checkPreconditions(Collection<Object> collection)

Checks the preconditions for creating a new IsElementOf processor.

Parameters:

collection - the collection to check

Throws:

NullPointerException - if collection is null

execute

public Object execute(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

Throws:

SuperCsvConstraintViolationException - if value isn't in the Collection