/// <summary>
/// Get the specify document position list from .idx file
/// </summary>
/// <param name="position">the position of the first byte of the index</param>
/// <param name="length">index content length</param>
/// <param name="count">max count of the documents that want read</param>
/// <param name="simple">is it simple index mode</param>
/// <returns>Word position list</returns>
public WordDocumentsList GetDocList(long position, long length, int count, bool simple)
{
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport();
_IndexFile.Seek(position, System.IO.SeekOrigin.Begin);
WordDocumentsList result = new WordDocumentsList();
if (count >= 0)
{
result.AddRange(Entity.DocumentPositionList.Deserialize(_IndexFile, ref count, simple, out result.WordCountSum));
result.RelDocCount = count;
}
else
{
result.AddRange(Entity.DocumentPositionList.Deserialize(_IndexFile, simple, out result.WordCountSum));
result.RelDocCount = result.Count;
}
performanceReport.Stop(string.Format("Read index file: len={0}, {1} results. ", _IndexFile.Position - position,
result.Count));
return(result);
}
internal Hubble.Core.Index.WordIndexReader GetWordIndex(string word,
WordFilePositionList filePositionList, int totalDocs, Data.DBProvider dbProvider, int maxReturnCount)
{
WordDocumentsList docList = new WordDocumentsList();
bool simple = _IndexMode == Hubble.Core.Data.Field.IndexMode.Simple;
if (maxReturnCount < 0)
{
foreach (FilePosition filePosition in filePositionList.FPList)
{
IDXFile idxFile = GetIDXFile(filePosition.Serial);
if (idxFile == null)
{
continue;
}
WordDocumentsList wdl = idxFile.GetDocList(filePosition.Position, filePosition.Length, -1, simple);
if (filePositionList.Count == 1)
{
docList = wdl;
}
else
{
docList.AddRange(wdl);
docList.WordCountSum += wdl.WordCountSum;
}
}
}
else
{
int remain = maxReturnCount;
foreach (FilePosition filePosition in filePositionList.FPList)
{
IDXFile idxFile = GetIDXFile(filePosition.Serial);
if (idxFile == null)
{
continue;
}
WordDocumentsList wdl = idxFile.GetDocList(filePosition.Position, filePosition.Length, remain, simple);
if (filePositionList.Count == 1)
{
docList = wdl;
}
else
{
docList.AddRange(wdl);
docList.WordCountSum += wdl.WordCountSum;
docList.RelDocCount += wdl.RelDocCount;
}
remain -= wdl.Count;
}
}
return(new WordIndexReader(word, docList, totalDocs, dbProvider));
}