protected void AddMap <TSource>(string counter, Expression <Func <IEnumerable <CounterEntry>, IEnumerable> > map)
{
if (string.IsNullOrWhiteSpace(counter))
{
throw new ArgumentException("Counter name cannot be null or whitespace.", nameof(counter));
}
if (map == null)
{
throw new ArgumentNullException(nameof(map));
}
_maps.Add(() =>
{
var querySource = (typeof(TSource) == typeof(object))
? "counters"
: IndexDefinitionHelper.GetQuerySource(Conventions, typeof(TSource), IndexSourceType.Counters);
if (StringExtensions.IsIdentifier(counter))
{
querySource = $"{querySource}.{counter}";
}
else
{
querySource = $"{querySource}[@\"{counter.Replace("\"", "\"\"")}\"]";
}
return(IndexDefinitionHelper.PruneToFailureLinqQueryAsStringToWorkableCode <TSource, TReduceResult>(map, Conventions, querySource, translateIdentityProperty: true));
});
}
