// Delete by query
private static long ApplyQueryDeletes(IEnumerable <QueryAndLimit> queriesIter, ReadersAndUpdates rld, SegmentReader reader)
{
long delCount = 0;
AtomicReaderContext readerContext = reader.AtomicContext;
bool any = false;
foreach (QueryAndLimit ent in queriesIter)
{
Query query = ent.Query;
int limit = ent.Limit;
DocIdSet docs = (new QueryWrapperFilter(query)).GetDocIdSet(readerContext, reader.LiveDocs);
if (docs != null)
{
DocIdSetIterator it = docs.GetIterator();
if (it != null)
{
while (true)
{
int doc = it.NextDoc();
if (doc >= limit)
{
break;
}
if (!any)
{
rld.InitWritableLiveDocs();
any = true;
}
if (rld.Delete(doc))
{
delCount++;
}
}
}
}
}
return(delCount);
}
// Delete by Term
private long ApplyTermDeletes(IEnumerable <Term> termsIter, ReadersAndUpdates rld, SegmentReader reader)
{
UninterruptableMonitor.Enter(this);
try
{
long delCount = 0;
Fields fields = reader.Fields;
if (fields is null)
{
// this reader has no postings
return(0);
}
TermsEnum termsEnum = null;
string currentField = null;
DocsEnum docs = null;
if (Debugging.AssertsEnabled)
{
Debugging.Assert(CheckDeleteTerm(null));
}
bool any = false;
//System.out.println(Thread.currentThread().getName() + " del terms reader=" + reader);
foreach (Term term in termsIter)
{
// Since we visit terms sorted, we gain performance
// by re-using the same TermsEnum and seeking only
// forwards
if (!string.Equals(term.Field, currentField, StringComparison.Ordinal))
{
if (Debugging.AssertsEnabled)
{
Debugging.Assert(currentField is null || currentField.CompareToOrdinal(term.Field) < 0);
}
currentField = term.Field;
Terms terms = fields.GetTerms(currentField);
if (terms != null)
{
termsEnum = terms.GetEnumerator(termsEnum);
}
else
{
termsEnum = null;
}
}
if (termsEnum is null)
{
continue;
}
if (Debugging.AssertsEnabled)
{
Debugging.Assert(CheckDeleteTerm(term));
}
// System.out.println(" term=" + term);
if (termsEnum.SeekExact(term.Bytes))
{
// we don't need term frequencies for this
DocsEnum docsEnum = termsEnum.Docs(rld.LiveDocs, docs, DocsFlags.NONE);
//System.out.println("BDS: got docsEnum=" + docsEnum);
if (docsEnum != null)
{
while (true)
{
int docID = docsEnum.NextDoc();
//System.out.println(Thread.currentThread().getName() + " del term=" + term + " doc=" + docID);
if (docID == DocIdSetIterator.NO_MORE_DOCS)
{
break;
}
if (!any)
{
rld.InitWritableLiveDocs();
any = true;
}
// NOTE: there is no limit check on the docID
// when deleting by Term (unlike by Query)
// because on flush we apply all Term deletes to
// each segment. So all Term deleting here is
// against prior segments:
if (rld.Delete(docID))
{
delCount++;
}
}
}
}
}
return(delCount);
}
finally
{
UninterruptableMonitor.Exit(this);
}
}
