/// <inheritdoc />
public int Add(T item, DocumentStatistics documentStatistics)
{
if (this.ItemLookup.ContainsKey(item))
{
throw new LiftiException(ExceptionMessages.ItemAlreadyIndexed);
}
var id = this.reusableIds.Count == 0 ? this.nextId++ : this.reusableIds.Dequeue();
this.Add(id, item, new ItemMetadata <T>(id, item, documentStatistics));
return(id);
}
/// <inheritdoc />
public void Add(int id, T item, DocumentStatistics documentStatistics)
{
if (this.ItemLookup.ContainsKey(item))
{
throw new LiftiException(ExceptionMessages.ItemAlreadyIndexed);
}
if (this.ItemIdLookup.ContainsKey(id))
{
throw new LiftiException(ExceptionMessages.IdAlreadyUsed, id);
}
this.Add(id, item, new ItemMetadata <T>(id, item, documentStatistics));
this.nextId = Math.Max(this.nextId, id + 1);
}
private IndexStatistics Adjust(DocumentStatistics documentStatistics, int direction)
{
if (documentStatistics is null)
{
throw new ArgumentNullException(nameof(documentStatistics));
}
var updatedFieldTokenCount = this.TokenCountByField;
foreach (var fieldTokenCount in documentStatistics.TokenCountByField)
{
updatedFieldTokenCount.TryGetValue(fieldTokenCount.Key, out var previousCount);
updatedFieldTokenCount = updatedFieldTokenCount.SetItem(fieldTokenCount.Key, previousCount + (fieldTokenCount.Value * direction));
}
return(new IndexStatistics(
updatedFieldTokenCount,
this.TotalTokenCount + (documentStatistics.TotalTokenCount * direction)));
}
internal IndexStatistics Add(DocumentStatistics documentStatistics)
{
return(Adjust(documentStatistics, 1));
}
internal IndexStatistics Remove(DocumentStatistics documentStatistics)
{
return(Adjust(documentStatistics, -1));
}
