public FilterTranslator GetFilter(string filterString, string collectionRole, bool scalar)
{
FilterCacheKey cacheKey = new FilterCacheKey(collectionRole, filterString, scalar);
FilterTranslator filter = ( FilterTranslator )Get(cacheKey);
if (filter == null)
{
filter = CreateFilterTranslator(filterString, cacheKey);
}
filter.Compile(collectionRole, this, settings.QuerySubstitutions, scalar);
return(filter);
}