// TODO: would be nice to factor out more of this, eg the
// FreqProxFieldMergeState, and code to visit all Fields
// under the same FieldInfo together, up into TermsHash*.
// Other writers would presumably share alot of this...
public override void Flush(System.Collections.IDictionary threadsAndFields, SegmentWriteState state)
{
// Gather all FieldData's that have postings, across all
// ThreadStates
System.Collections.ArrayList allFields = new System.Collections.ArrayList();
System.Collections.IEnumerator it = new System.Collections.Hashtable(threadsAndFields).GetEnumerator();
while (it.MoveNext())
{
System.Collections.DictionaryEntry entry = (System.Collections.DictionaryEntry)it.Current;
System.Collections.ICollection fields = (System.Collections.ICollection)entry.Value;
System.Collections.IEnumerator fieldsIt = fields.GetEnumerator();
while (fieldsIt.MoveNext())
{
FreqProxTermsWriterPerField perField = (FreqProxTermsWriterPerField)((System.Collections.DictionaryEntry)fieldsIt.Current).Key;
if (perField.termsHashPerField.numPostings > 0)
{
allFields.Add(perField);
}
}
}
// Sort by field name
allFields.Sort();
int numAllFields = allFields.Count;
// TODO: allow Lucene user to customize this consumer:
FormatPostingsFieldsConsumer consumer = new FormatPostingsFieldsWriter(state, fieldInfos);
/*
* Current writer chain:
* FormatPostingsFieldsConsumer
* -> IMPL: FormatPostingsFieldsWriter
* -> FormatPostingsTermsConsumer
* -> IMPL: FormatPostingsTermsWriter
* -> FormatPostingsDocConsumer
* -> IMPL: FormatPostingsDocWriter
* -> FormatPostingsPositionsConsumer
* -> IMPL: FormatPostingsPositionsWriter
*/
int start = 0;
while (start < numAllFields)
{
FieldInfo fieldInfo = ((FreqProxTermsWriterPerField)allFields[start]).fieldInfo;
System.String fieldName = fieldInfo.name;
int end = start + 1;
while (end < numAllFields && ((FreqProxTermsWriterPerField)allFields[end]).fieldInfo.name.Equals(fieldName))
{
end++;
}
FreqProxTermsWriterPerField[] fields = new FreqProxTermsWriterPerField[end - start];
for (int i = start; i < end; i++)
{
fields[i - start] = (FreqProxTermsWriterPerField)allFields[i];
// Aggregate the storePayload as seen by the same
// field across multiple threads
fieldInfo.storePayloads |= fields[i - start].hasPayloads;
}
// If this field has postings then add them to the
// segment
AppendPostings(fields, consumer);
for (int i = 0; i < fields.Length; i++)
{
TermsHashPerField perField = fields[i].termsHashPerField;
int numPostings = perField.numPostings;
perField.Reset();
perField.ShrinkHash(numPostings);
fields[i].Reset();
}
start = end;
}
it = new System.Collections.Hashtable(threadsAndFields).GetEnumerator();
while (it.MoveNext())
{
System.Collections.DictionaryEntry entry = (System.Collections.DictionaryEntry)it.Current;
FreqProxTermsWriterPerThread perThread = (FreqProxTermsWriterPerThread)entry.Key;
perThread.termsHashPerThread.Reset(true);
}
consumer.Finish();
}
internal void ShrinkHash()
{
termsHashPerField.ShrinkHash(maxNumPostings);
maxNumPostings = 0;
}