Class MapTransformer
- java.lang.Object
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- org.apache.commons.collections.functors.MapTransformer
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- All Implemented Interfaces:
java.io.Serializable
,Transformer
public final class MapTransformer extends java.lang.Object implements Transformer, java.io.Serializable
Transformer implementation that returns the value held in a specified map using the input parameter as a key.- Since:
- Commons Collections 3.0
- Version:
- $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description private java.util.Map
iMap
The map of data to lookup inprivate static long
serialVersionUID
Serial version UID
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Constructor Summary
Constructors Modifier Constructor Description private
MapTransformer(java.util.Map map)
Constructor that performs no validation.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static Transformer
getInstance(java.util.Map map)
Factory to create the transformer.java.util.Map
getMap()
Gets the map to lookup in.java.lang.Object
transform(java.lang.Object input)
Transforms the input to result by looking it up in aMap
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Field Detail
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serialVersionUID
private static final long serialVersionUID
Serial version UID- See Also:
- Constant Field Values
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iMap
private final java.util.Map iMap
The map of data to lookup in
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Method Detail
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getInstance
public static Transformer getInstance(java.util.Map map)
Factory to create the transformer.If the map is null, a transformer that always returns null is returned.
- Parameters:
map
- the map, not cloned- Returns:
- the transformer
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transform
public java.lang.Object transform(java.lang.Object input)
Transforms the input to result by looking it up in aMap
.- Specified by:
transform
in interfaceTransformer
- Parameters:
input
- the input object to transform- Returns:
- the transformed result
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getMap
public java.util.Map getMap()
Gets the map to lookup in.- Returns:
- the map
- Since:
- Commons Collections 3.1
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