Reprensetns a set of sub indexes, and knows how to map a single sub index
value from an alias and a set of
Property ids.
This allows to have different mappings from
org.compass.core.Resource to a specific sub index.
author: kimchy
Copmutes a sub index based on the given alias and ids.
Parameters: alias - The alias to compute the sub index by (optional) Parameters: ids - The set of ids to compute the sub index by (optional) The hashed sub index throws: SearchEngineException -