/// <summary>
/// Expert: create a ParallelAtomicReader based on the provided
/// readers and storedFieldReaders; when a document is
/// loaded, only storedFieldsReaders will be used.
/// </summary>
public ParallelAtomicReader(bool closeSubReaders, AtomicReader[] readers, AtomicReader[] storedFieldsReaders)
{
if (!InstanceFieldsInitialized)
{
InitializeInstanceFields();
InstanceFieldsInitialized = true;
}
this.CloseSubReaders = closeSubReaders;
if (readers.Length == 0 && storedFieldsReaders.Length > 0)
{
throw new System.ArgumentException("There must be at least one main reader if storedFieldsReaders are used.");
}
this.ParallelReaders = (AtomicReader[])readers.Clone();
this.StoredFieldsReaders = (AtomicReader[])storedFieldsReaders.Clone();
if (ParallelReaders.Length > 0)
{
AtomicReader first = ParallelReaders[0];
this.maxDoc = first.MaxDoc;
this.numDocs = first.NumDocs;
this.hasDeletions = first.HasDeletions;
}
else
{
this.maxDoc = this.numDocs = 0;
this.hasDeletions = false;
}
CollectionsHelper.AddAll(CompleteReaderSet, this.ParallelReaders);
CollectionsHelper.AddAll(CompleteReaderSet, this.StoredFieldsReaders);
// check compatibility:
foreach (AtomicReader reader in CompleteReaderSet)
{
if (reader.MaxDoc != maxDoc)
{
throw new System.ArgumentException("All readers must have same maxDoc: " + maxDoc + "!=" + reader.MaxDoc);
}
}
// TODO: make this read-only in a cleaner way?
FieldInfos.Builder builder = new FieldInfos.Builder();
// build FieldInfos and fieldToReader map:
foreach (AtomicReader reader in this.ParallelReaders)
{
FieldInfos readerFieldInfos = reader.FieldInfos;
foreach (FieldInfo fieldInfo in readerFieldInfos)
{
// NOTE: first reader having a given field "wins":
if (!FieldToReader.ContainsKey(fieldInfo.Name))
{
builder.Add(fieldInfo);
FieldToReader[fieldInfo.Name] = reader;
if (fieldInfo.HasVectors())
{
TvFieldToReader[fieldInfo.Name] = reader;
}
}
}
}
FieldInfos_Renamed = builder.Finish();
// build Fields instance
foreach (AtomicReader reader in this.ParallelReaders)
{
Fields readerFields = reader.Fields;
if (readerFields != null)
{
foreach (string field in readerFields)
{
// only add if the reader responsible for that field name is the current:
if (FieldToReader[field].Equals(reader))
{
this.Fields_Renamed.AddField(field, readerFields.Terms(field));
}
}
}
}
// do this finally so any Exceptions occurred before don't affect refcounts:
foreach (AtomicReader reader in CompleteReaderSet)
{
if (!closeSubReaders)
{
reader.IncRef();
}
reader.RegisterParentReader(this);
}
}