protected override IEnumerable <string> GetKeysMatching <T>(Func <T, bool> predicate)
{
var allMatches = new List <string>();
var allTerms = new List <string>();
var scopedReader = _indexController.GetScopedReader();
var cachekey = "CacheKey";
var termScanner = scopedReader.InnerReader.Terms(new Term(cachekey, string.Empty));
// Lucene doesn't start at -1 so can't just do "while termScanner.Next()"
var termEnumerator = termScanner.Term();
while (termEnumerator != null && termEnumerator.Field() == "CacheKey")
{
var asText = termEnumerator.Text();
allTerms.Add(asText);
var asKey = (CacheKey <T>)asText;
if (asKey != null)
{
var matches = predicate.Invoke(asKey.Original);
if (matches)
{
allMatches.Add(asText);
}
}
termEnumerator = termScanner.Next() ? termScanner.Term() : null;
}
return(allMatches);
}