Package org.apache.commons.collections.functors

Class MapTransformer

java.lang.Object
org.apache.commons.collections.functors.MapTransformer
All Implemented Interfaces:
Serializable, Transformer
public final class MapTransformer extends Object implements Transformer, 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) $
Author:
Stephen Colebourne
See Also:

  • Method Details

    • getInstance

      public static Transformer getInstance(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

    • transform

      public Object transform(Object input)
      Transforms the input to result by looking it up in a Map.
      Specified by:
      transform in interface Transformer
      Parameters:
      input - the input object to transform
      Returns:
      the transformed result

    • getMap

      public Map getMap()
      Gets the map to lookup in.
      Returns:
      the map
      Since:
      Commons Collections 3.1