public /*internal*/ Document Doc(int n, FieldSelector fieldSelector, IState state)
{
SeekIndex(n, state);
long position = indexStream.ReadLong(state);
fieldsStream.Seek(position, state);
var doc = new Document();
int numFields = fieldsStream.ReadVInt(state);
for (int i = 0; i < numFields; i++)
{
int fieldNumber = fieldsStream.ReadVInt(state);
FieldInfo fi = fieldInfos.FieldInfo(fieldNumber);
FieldSelectorResult acceptField = fieldSelector == null?FieldSelectorResult.LOAD:fieldSelector.Accept(fi.name);
byte bits = fieldsStream.ReadByte(state);
System.Diagnostics.Debug.Assert(bits <= FieldsWriter.FIELD_IS_COMPRESSED + FieldsWriter.FIELD_IS_TOKENIZED + FieldsWriter.FIELD_IS_BINARY);
bool compressed = (bits & FieldsWriter.FIELD_IS_COMPRESSED) != 0;
System.Diagnostics.Debug.Assert(
(!compressed || (format < FieldsWriter.FORMAT_LUCENE_3_0_NO_COMPRESSED_FIELDS)),
"compressed fields are only allowed in indexes of version <= 2.9");
bool tokenize = (bits & FieldsWriter.FIELD_IS_TOKENIZED) != 0;
bool binary = (bits & FieldsWriter.FIELD_IS_BINARY) != 0;
//TODO: Find an alternative approach here if this list continues to grow beyond the
//list of 5 or 6 currently here. See Lucene 762 for discussion
if (acceptField.Equals(FieldSelectorResult.LOAD))
{
AddField(doc, fi, binary, compressed, tokenize, state);
}
else if (acceptField.Equals(FieldSelectorResult.LOAD_AND_BREAK))
{
AddField(doc, fi, binary, compressed, tokenize, state);
break; //Get out of this loop
}
else if (acceptField.Equals(FieldSelectorResult.LAZY_LOAD))
{
AddFieldLazy(doc, fi, binary, compressed, tokenize, state);
}
else if (acceptField.Equals(FieldSelectorResult.SIZE))
{
SkipField(binary, compressed, AddFieldSize(doc, fi, binary, compressed, state), state);
}
else if (acceptField.Equals(FieldSelectorResult.SIZE_AND_BREAK))
{
AddFieldSize(doc, fi, binary, compressed, state);
break;
}
else
{
SkipField(binary, compressed, state);
}
}
return(doc);
}
public Document Doc(int n, FieldSelector fieldSelector)
{
indexStream.Seek(n * 8L);
long position = indexStream.ReadLong();
fieldsStream.Seek(position);
Document doc = new Document();
int numFields = fieldsStream.ReadVInt();
for (int i = 0; i < numFields; i++)
{
int fieldNumber = fieldsStream.ReadVInt();
FieldInfo fi = fieldInfos.FieldInfo(fieldNumber);
FieldSelectorResult acceptField = fieldSelector == null ? FieldSelectorResult.LOAD : fieldSelector.Accept(fi.name);
byte bits = fieldsStream.ReadByte();
bool compressed = (bits & FieldsWriter.FIELD_IS_COMPRESSED) != 0;
bool tokenize = (bits & FieldsWriter.FIELD_IS_TOKENIZED) != 0;
bool binary = (bits & FieldsWriter.FIELD_IS_BINARY) != 0;
//TODO: Find an alternative approach here if this list continues to grow beyond the
//list of 5 or 6 currently here. See Lucene 762 for discussion
if (acceptField.Equals(FieldSelectorResult.LOAD))
{
AddField(doc, fi, binary, compressed, tokenize);
}
else if (acceptField.Equals(FieldSelectorResult.LOAD_FOR_MERGE))
{
AddFieldForMerge(doc, fi, binary, compressed, tokenize);
}
else if (acceptField.Equals(FieldSelectorResult.LOAD_AND_BREAK))
{
AddField(doc, fi, binary, compressed, tokenize);
break; //Get out of this loop
}
else if (acceptField.Equals(FieldSelectorResult.LAZY_LOAD))
{
AddFieldLazy(doc, fi, binary, compressed, tokenize);
}
else if (acceptField.Equals(FieldSelectorResult.SIZE))
{
SkipField(binary, compressed, AddFieldSize(doc, fi, binary, compressed));
}
else if (acceptField.Equals(FieldSelectorResult.SIZE_AND_BREAK))
{
AddFieldSize(doc, fi, binary, compressed);
break;
}
else
{
SkipField(binary, compressed);
}
}
return(doc);
}
/// <summary> Indicate whether to load the field with the given name or not. If the <see cref="AbstractField.Name()" /> is not in either of the
/// initializing Sets, then <see cref="FieldSelectorResult.NO_LOAD" /> is returned. If a Field name
/// is in both <c>fieldsToLoad</c> and <c>lazyFieldsToLoad</c>, lazy has precedence.
///
/// </summary>
/// <param name="fieldName">The <see cref="Field" /> name to check
/// </param>
/// <returns> The <see cref="FieldSelectorResult" />
/// </returns>
public virtual FieldSelectorResult Accept(System.String fieldName)
{
FieldSelectorResult result = FieldSelectorResult.NO_LOAD;
if (fieldsToLoad.Contains(fieldName) == true)
{
result = FieldSelectorResult.LOAD;
}
if (lazyFieldsToLoad.Contains(fieldName) == true)
{
result = FieldSelectorResult.LAZY_LOAD;
}
return(result);
}
/// <summary>Load field according to its associated value in fieldSelections</summary>
/// <param name="field">a field name
/// </param>
/// <returns> the fieldSelections value that field maps to or NO_LOAD if none.
/// </returns>
public virtual FieldSelectorResult Accept(System.String field)
{
FieldSelectorResult selection = fieldSelections[field];
return(selection != FieldSelectorResult.INVALID ? selection : FieldSelectorResult.NO_LOAD); // TODO: See FieldSelectorResult
}
