public Directory CreateIndex()
{
if (IsLoaded)
{
throw new InvalidOperationException();
}
IsLoading = true;
var index = new RAMDirectory();
IReadOnlyList <(string UserField, string Language)> tasks =
_adapter.GetUserFields()
.Where(_adapter.IsIndexedInSpellchecker)
.SelectMany(f => _adapter.GetFieldLanguages(f).Select(l => (f, l)))
.ToReadOnlyList();
TotalFields = tasks.Count;
var indexedWordsByField = new Dictionary <string, HashSet <string> >(Str.Comparer);
void getContentToIndex((string UserField, string Language) task)
{
var values = _adapter.IsStoredInSpellchecker(task.UserField, task.Language)
? GetObjectsToIndex().SelectMany(c =>
_adapter.GetSpellcheckerValues(c, task.UserField, task.Language))
: GetValuesCache(task.UserField, task.Language);
var spellcheckerField = _adapter.GetSpellcheckerFieldIn(task.UserField, task.Language);
HashSet <string> indexedWords;
lock (indexedWordsByField)
{
if (!indexedWordsByField.TryGetValue(spellcheckerField, out indexedWords))
{
indexedWords = new HashSet <string>(Str.Comparer);
indexedWordsByField.Add(spellcheckerField, indexedWords);
}
}
lock (indexedWords)
foreach (string value in values)
{
indexedWords.Add(value);
}
}
IndexUtils.ForEach(tasks, getContentToIndex);
TotalFields = indexedWordsByField.Count;
_indexedFields = 0;
_spellchecker.BeginIndex(index);
IndexUtils.ForEach(
indexedWordsByField,
indexField,
suppressParallelism: true);
if (_abort)
{
return(null);
}
_spellchecker.EndIndex();
IsLoading = false;
IndexingProgress?.Invoke();
IsLoaded = true;
return(index);
}