public HashtableSearcher(string dataFileFullName, NormlizeTextFunction normlizeTextFunction = null)
{
if (dataFileFullName.IsEmptyOrNull())
{
throw (new ArgumentNullException("dataFileFullName"));
}
var indexFileFullName = IndexFileHelper.GetIndexFileFullName(dataFileFullName);
this.IndexHeader = HashtableIndexer.GetIndexHeaderByIndexFile(indexFileFullName);
if (!this.IndexHeader.IsSignValid())
{
throw (new DiskSearchEngineException("Invalid sign of index file: '" + indexFileFullName + "'."));
}
if (!this.IndexHeader.IsCorrectSizeAndModifyTime(dataFileFullName))
{
throw (new DiskSearchEngineException("Data file was modify after last indexing."));
}
this._DataFileTextLineReader = new TextLineReader
(
dataFileFullName,
this.IndexHeader.DataFileEncoding,
this.IndexHeader.DataRecordMaxBytesLenght + this.IndexHeader.DataFileEncoding.GetMaxByteCount(10)
);
this._IndexFileBinaryReader = IndexFileHelper.CreateBinaryReaderRandomAccess(indexFileFullName);
this._DiskSlotReadBuffer = new ReadBuffer <DiskSlot>();
this._DiskTagReadBuffer = new ReadBuffer <DiskTag>();
this._DiskSlotInt32ReadBuffer = new ReadBuffer <DiskSlotInt32>();
this._DiskTagInt32ReadBuffer = new ReadBuffer <DiskTagInt32>();
this._NormlizeTextFunction = normlizeTextFunction;
switch (this.IndexHeader.HashtableSlotType)
{
case HashtableIndexFileHeader.SlotType.Int64:
this._IsExistsFunction = IsExistsDiskRoutine;
break;
case HashtableIndexFileHeader.SlotType.Int32:
this._IsExistsFunction = IsExistsDiskRoutineIn32;
break;
default:
throw (new ArgumentException("this.IndexHeader.HashtableSlotType"));
}
}
public static HashtableIndexFileHeader GetIndexHeaderByDataFile(string dataFileFullName)
{
return(GetIndexHeaderByIndexFile(IndexFileHelper.GetIndexFileFullName(dataFileFullName)));
}