Package org.supercsv.cellprocessor
Class HashMapper
- java.lang.Object
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- org.supercsv.cellprocessor.CellProcessorAdaptor
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- org.supercsv.cellprocessor.HashMapper
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- 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
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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 HashMapper(java.util.Map<java.lang.Object,java.lang.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(java.util.Map<java.lang.Object,java.lang.Object> mapping, java.lang.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(java.util.Map<java.lang.Object,java.lang.Object> mapping, java.lang.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(java.util.Map<java.lang.Object,java.lang.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.
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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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HashMapper
public HashMapper(java.util.Map<java.lang.Object,java.lang.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:
java.lang.NullPointerException
- if mapping is nulljava.lang.IllegalArgumentException
- if mapping is empty
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HashMapper
public HashMapper(java.util.Map<java.lang.Object,java.lang.Object> mapping, java.lang.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 MapdefaultValue
- the value to return if no mapping is found- Throws:
java.lang.NullPointerException
- if mapping is nulljava.lang.IllegalArgumentException
- if mapping is empty
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HashMapper
public HashMapper(java.util.Map<java.lang.Object,java.lang.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 Mapnext
- the next processor in the chain- Throws:
java.lang.NullPointerException
- if mapping or next is nulljava.lang.IllegalArgumentException
- if mapping is empty
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HashMapper
public HashMapper(java.util.Map<java.lang.Object,java.lang.Object> mapping, java.lang.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 MapdefaultValue
- the value to return if no mapping is foundnext
- the next processor in the chain- Throws:
java.lang.NullPointerException
- if mapping or next is nulljava.lang.IllegalArgumentException
- if mapping is empty
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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
- Throws:
SuperCsvCellProcessorException
- if value is null
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