/// <summary>
/// Called during merging to merge all <seealso cref="Fields"/> from
/// sub-readers. this must recurse to merge all postings
/// (terms, docs, positions, etc.). A {@link
/// PostingsFormat} can override this default
/// implementation to do its own merging.
/// </summary>
public virtual void Merge(MergeState mergeState, Fields fields)
{
foreach (string field in fields)
{
FieldInfo info = mergeState.FieldInfos.FieldInfo(field);
Debug.Assert(info != null, "FieldInfo for field is null: " + field);
Terms terms = fields.GetTerms(field);
if (terms != null)
{
TermsConsumer termsConsumer = AddField(info);
termsConsumer.Merge(mergeState, info.IndexOptions, terms.GetIterator(null));
}
}
}