public XrfRecord ReadRecord
(
int mfn
)
{
if (mfn <= 0)
{
throw new ArgumentOutOfRangeException("mfn");
}
long offset = _GetOffset(mfn);
if (offset >= _stream.Length)
{
throw new ArgumentOutOfRangeException("mfn");
}
if (_stream.Seek(offset, SeekOrigin.Begin) != offset)
{
throw new IOException();
}
long ofs = _stream.ReadInt64Network();
int flags = _stream.ReadInt32Network();
XrfRecord result = new XrfRecord
{
Mfn = mfn,
Offset = ofs,
Status = (RecordStatus)flags
};
return(result);
}
/// <summary>
/// ibatrak добавление / обновление записи
/// </summary>
public void WriteRecord(IrbisRecord record, bool padding)
{
//Mst.LockDatabase(true);
if (record.Mfn <= 0)
{
record.Version = 1;
record.PreviousOffset = 0;
var offset = Mst.AddRecord(record, padding);
Xrf.WriteRecord(new XrfRecord {
Mfn = record.Mfn, Offset = offset, Status = RecordStatus.NonActualized
}, padding);
OnIrbis64Code(0);
}
else
{
//XrfRecord xrfRecord = Xrf.ReadRecord(record.Mfn);
XrfRecord xrfRecord = GetXrfRecordError(record.Mfn, RecordStatus.Locked | RecordStatus.LogicallyDeleted | RecordStatus.PhysicallyDeleted | RecordStatus.Absent);
if (_codeArgs.Code == 0)
{
long offset = xrfRecord.Offset;
int version = Mst.ReadVersion(xrfRecord.Offset);
record.Version = version + 1;
record.PreviousOffset = xrfRecord.Offset;
//предыдущую версию записи пометить как неактуализированную
Mst.UpdateRecordStatus(RecordStatus.NonActualized, offset);
offset = Mst.UpdateRecord(record, RecordStatus.Last | RecordStatus.NonActualized, padding);
xrfRecord.Offset = offset;
xrfRecord.Status = RecordStatus.NonActualized;
Xrf.WriteRecord(xrfRecord, padding);
}
}
//Mst.LockDatabase(false);
}
public IrbisRecord[] SearchReadSimple(string key)
{
int[] mfns = InvertedFile.SearchSimple(key);
List <IrbisRecord> result = new List <IrbisRecord>();
foreach (int mfn in mfns)
{
try
{
XrfRecord xrfRecord = Xrf.ReadRecord(mfn);
if (!xrfRecord.Deleted)
{
MstRecord mstRecord = Mst.ReadRecord2(xrfRecord.Offset);
if (!mstRecord.Deleted)
{
IrbisRecord irbisRecord = mstRecord.DecodeRecord();
irbisRecord.Database = Database;
result.Add(irbisRecord);
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
return(result.ToArray());
}
public void WriteRecord
(
XrfRecord record
)
{
if (record == null)
{
throw new ArgumentNullException("record");
}
}
public void LockRecord
(
int mfn,
bool flag
)
{
XrfRecord record = ReadRecord(mfn);
if (flag != record.Locked)
{
WriteRecord(record);
}
}
public IrbisRecord ReadRecord
(
int mfn
)
{
XrfRecord xrfRecord = Xrf.ReadRecord(mfn);
if (xrfRecord.Offset == 0)
{
return(null);
}
MstRecord mstRecord = Mst.ReadRecord2(xrfRecord.Offset);
IrbisRecord result = mstRecord.DecodeRecord();
result.Database = Database;
return(result);
}
/// <summary>
/// ibatrak блокировка / разблокировка записи с проверкой
/// </summary>
public void LockRecord(int mfn, bool flag)
{
var status = RecordStatus.LogicallyDeleted | RecordStatus.PhysicallyDeleted | RecordStatus.Absent;
//статус блокировки ошибкой считать только при попытке заблокировать
if (flag)
{
status |= RecordStatus.Locked;
}
XrfRecord xrfRecord = GetXrfRecordError(mfn, status);
if (_codeArgs.Code == 0 && flag != xrfRecord.Locked)
{
//ibatrak установка флага
xrfRecord.Locked = flag;
Xrf.WriteRecord(xrfRecord, false);
}
}
/// <summary>
/// ibatrak обновление статуса записи на актуализированный
/// </summary>
public void SetRecordActualized(IrbisRecord record, bool keepLock, bool ifUpdate, bool padding)
{
if (record == null || record.Mfn <= 0)
{
return;
}
var deleted = record.Deleted;
record.Status = RecordStatus.Last;
if (deleted)
{
record.Status |= RecordStatus.LogicallyDeleted;
}
if (!ifUpdate)
{
record.Status |= RecordStatus.NonActualized;
}
XrfRecord xrfRecord = Xrf.ReadRecord(record.Mfn);
Mst.UpdateRecordStatus(record.Status, xrfRecord.Offset);
xrfRecord.Status = RecordStatus.AllZero;
if (deleted)
{
xrfRecord.Status |= RecordStatus.LogicallyDeleted;
}
//оставить блокировку
if (keepLock)
{
xrfRecord.Status |= RecordStatus.Locked;
}
//не было актуализации
if (!ifUpdate)
{
xrfRecord.Status |= RecordStatus.NonActualized;
}
Xrf.WriteRecord(xrfRecord, padding);
//в записи MST пишутся одни флаги, в XRF - другие
//в результирующей записи нужно иметь комбинированный статус
record.Status |= xrfRecord.Status;
}
/// <summary>
/// ibatrak проверка записи
/// </summary>
private XrfRecord GetXrfRecordError(int mfn, RecordStatus status)
{
//при вызове GetMaxMfn перечитывается контрольная запись
if (mfn <= 0 || mfn > GetMaxMfn())
{
OnIrbis64Code(-140 /*READ_WRONG_MFN*/);
return(null);
}
XrfRecord xrfRecord = null;
try
{
xrfRecord = Xrf.ReadRecord(mfn);
}
catch (ArgumentOutOfRangeException)
{
OnIrbis64Code(-140 /*READ_WRONG_MFN*/);
return(null);
}
if ((xrfRecord.Status & RecordStatus.LogicallyDeleted & status) != 0)
{
OnIrbis64Code(-600 /*REC_DELETE*/);
return(xrfRecord);
}
if ((xrfRecord.Status & (RecordStatus.PhysicallyDeleted | RecordStatus.Absent) & status) != 0)
{
OnIrbis64Code(-601 /*REC_PHYS_DELETE*/);
return(xrfRecord);
}
if ((xrfRecord.Status & RecordStatus.Locked & status) != 0)
{
OnIrbis64Code(-602 /*ERR_RECLOCKED*/);
return(xrfRecord);
}
OnIrbis64Code(0);
return(xrfRecord);
}
/// <summary>
/// ibatrak удаление записи
/// </summary>
public void DeleteRecord(IrbisRecord record, bool padding)
{
if (record.Mfn <= 0)
{
OnIrbis64Code(0);
return;
}
//Mst.LockDatabase(true);
XrfRecord xrfRecord = GetXrfRecordError(record.Mfn, RecordStatus.Locked | RecordStatus.Absent);
if (_codeArgs.Code == 0 && !xrfRecord.Deleted)
{
long offset = xrfRecord.Offset;
//предыдущие версии записи пометить как удаленные
int version = Mst.ReadVersion(xrfRecord.Offset);
record.Version = version + 1;
record.PreviousOffset = xrfRecord.Offset;
for (int i = 0; i < version; i++)
{
Mst.UpdateRecordStatus(RecordStatus.LogicallyDeleted | RecordStatus.NonActualized, offset);
if (i < version - 1)
{
var leader = Mst.ReadRecordLeader(offset);
offset = leader.Previous;
}
}
offset = Mst.UpdateRecord(record, RecordStatus.Last | RecordStatus.LogicallyDeleted | RecordStatus.NonActualized, padding);
xrfRecord.Offset = offset;
xrfRecord.Status = RecordStatus.LogicallyDeleted | RecordStatus.NonActualized;
Xrf.WriteRecord(xrfRecord, padding);
}
//Mst.LockDatabase(false);
//в записи MST пишутся одни флаги, в XRF - другие
//в результирующей записи нужно иметь комбинированный статус
record.Status |= xrfRecord.Status;
}
