/// <summary>Add an IndexReader whose stored fields will not be returned. This can
/// accellerate search when stored fields are only needed from a subset of
/// the IndexReaders.
///
/// </summary>
/// <throws> IllegalArgumentException if not all indexes contain the same number </throws>
/// <summary> of documents
/// </summary>
/// <throws> IllegalArgumentException if not all indexes have the same value </throws>
/// <summary> of <see cref="IndexReader.MaxDoc" />
/// </summary>
/// <throws> IOException if there is a low-level IO error </throws>
public virtual void Add(IndexReader reader, bool ignoreStoredFields)
{
EnsureOpen();
if (readers.Count == 0)
{
this.maxDoc = reader.MaxDoc;
this.numDocs = reader.NumDocs();
this.hasDeletions = reader.HasDeletions;
}
if (reader.MaxDoc != maxDoc)
// check compatibility
throw new System.ArgumentException("All readers must have same maxDoc: " + maxDoc + "!=" + reader.MaxDoc);
if (reader.NumDocs() != numDocs)
throw new System.ArgumentException("All readers must have same numDocs: " + numDocs + "!=" + reader.NumDocs());
ICollection<string> fields = reader.GetFieldNames(IndexReader.FieldOption.ALL);
readerToFields[reader] = fields;
foreach(var field in fields)
{
// update fieldToReader map
// Do a containskey firt to mimic java behavior
if (!fieldToReader.ContainsKey(field) || fieldToReader[field] == null)
fieldToReader[field] = reader;
}
if (!ignoreStoredFields)
storedFieldReaders.Add(reader); // add to storedFieldReaders
readers.Add(reader);
if (incRefReaders)
{
reader.IncRef();
}
decrefOnClose.Add(incRefReaders);
}
