Class HashMapper

java.lang.Object

org.supercsv.cellprocessor.CellProcessorAdaptor

org.supercsv.cellprocessor.HashMapper

All Implemented Interfaces:

BoolCellProcessor, CellProcessor, DateCellProcessor, DoubleCellProcessor, LongCellProcessor, StringCellProcessor

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

Maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value.

Since:

1.50

Author:

Dominique De Vito, James Bassett

Field Summary

Fields inherited from class CellProcessorAdaptor

next

Constructor Summary

Constructors

Constructor	Description
HashMapper(Map<Object,Object> mapping)	Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value.
HashMapper(Map<Object,Object> mapping, Object defaultValue)	Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value.
HashMapper(Map<Object,Object> mapping, Object defaultValue, CellProcessor next)	Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value.
HashMapper(Map<Object,Object> mapping, CellProcessor next)	Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value.

Method Summary

Modifier and Type	Method	Description
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

Constructor Details

HashMapper

public HashMapper(Map<Object,Object> mapping)

Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value. If no mapping is found, then null is returned.

Parameters:

mapping - the Map

Throws:

NullPointerException - if mapping is null

IllegalArgumentException - if mapping is empty

HashMapper

public HashMapper(Map<Object,Object> mapping,
 Object defaultValue)

Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value. If no mapping is found, then the supplied default value is returned.

Parameters:

mapping - the Map

defaultValue - the value to return if no mapping is found

Throws:

NullPointerException - if mapping is null

IllegalArgumentException - if mapping is empty

HashMapper

public HashMapper(Map<Object,Object> mapping,
 CellProcessor next)

Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value. If no mapping is found, then null is returned. Regardless of whether a mapping is found, the next processor in the chain will be called.

Parameters:

mapping - the Map

next - the next processor in the chain

Throws:

NullPointerException - if mapping or next is null

IllegalArgumentException - if mapping is empty

HashMapper

public HashMapper(Map<Object,Object> mapping,
 Object defaultValue,
 CellProcessor next)

Constructs a new HashMapper processor, which maps from one object to another, by looking up a Map with the input as the key, and returning its corresponding value. If no mapping is found, then the supplied default value is returned. Regardless of whether a mapping is found, the next processor in the chain will be called.

Parameters:

mapping - the Map

defaultValue - the value to return if no mapping is found

next - the next processor in the chain

Throws:

NullPointerException - if mapping or next is null

IllegalArgumentException - if mapping is empty

Method Details

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:

SuperCsvCellProcessorException - if value is null