/**
* Factory method to create a transforming map that will transform
* existing contents of the specified map.
* <p>
* If there are any elements already in the map being decorated, they
* will be transformed by this method.
* Constrast this with {@link #decorate}.
*
* @param map the map to decorate, must not be null
* @param keyTransformer the transformer to use for key conversion, null means no transformation
* @param valueTransformer the transformer to use for value conversion, null means no transformation
* @throws IllegalArgumentException if map is null
* @since Commons Collections 3.2
*/
public static java.util.Map <Object, Object> decorateTransform(java.util.Map <Object, Object> map, Transformer keyTransformer, Transformer valueTransformer)
{
TransformedMap decorated = new TransformedMap(map, keyTransformer, valueTransformer);
if (map.size() > 0)
{
java.util.Map <Object, Object> transformed = decorated.transformMap(map);
decorated.clear();
decorated.getMap().putAll(transformed); // avoids double transformation
}
return(decorated);
}
/**
* Factory method to create a transforming map that will transform
* existing contents of the specified map.
* <p>
* If there are any elements already in the map being decorated, they
* will be transformed by this method.
* Constrast this with {@link #decorate}.
*
* @param map the map to decorate, must not be null
* @param keyTransformer the transformer to use for key conversion, null means no transformation
* @param valueTransformer the transformer to use for value conversion, null means no transformation
* @throws IllegalArgumentException if map is null
* @since Commons Collections 3.2
*/
public static java.util.Map<Object, Object> decorateTransform(java.util.Map<Object, Object> map, Transformer keyTransformer, Transformer valueTransformer)
{
TransformedMap decorated = new TransformedMap(map, keyTransformer, valueTransformer);
if (map.size() > 0)
{
java.util.Map<Object, Object> transformed = decorated.transformMap(map);
decorated.clear();
decorated.getMap().putAll(transformed); // avoids double transformation
}
return decorated;
}