/// <summary>
/// Read the class info header with the specific oid
/// </summary>
/// <returns> The read class info object @ </returns>
public ClassInfo ReadClassInfoHeader(OID classInfoOid)
{
if (OdbConfiguration.IsLoggingEnabled())
{
DLogger.Debug("FileSystemReader: Reading new Class info Header with oid " + classInfoOid);
}
var classInfoPosition = GetObjectPositionFromItsOid(classInfoOid, true, true);
_fsi.SetReadPosition(classInfoPosition);
var blockSize = _fsi.ReadInt();
var blockType = _fsi.ReadByte();
if (!BlockTypes.IsClassHeader(blockType))
{
throw new OdbRuntimeException(
NDatabaseError.WrongTypeForBlockType.AddParameter("Class Header").AddParameter(blockType).
AddParameter(classInfoPosition));
}
//class info category, to remove
_fsi.ReadByte();
var classInfoId = OIDFactory.BuildClassOID(_fsi.ReadLong());
var previousClassOID = ReadOid();
var nextClassOID = ReadOid();
var nbObjects = _fsi.ReadLong();
var originalZoneInfoFirst = ReadOid();
var originalZoneInfoLast = ReadOid();
var fullClassName = _fsi.ReadString();
var maxAttributeId = _fsi.ReadInt();
var attributesDefinitionPosition = _fsi.ReadLong();
var classInfo = new ClassInfo(fullClassName)
{
Position = classInfoPosition,
ClassInfoId = classInfoId,
PreviousClassOID = previousClassOID,
NextClassOID = nextClassOID,
MaxAttributeId = maxAttributeId,
AttributesDefinitionPosition = attributesDefinitionPosition
};
classInfo.OriginalZoneInfo.SetNbObjects(nbObjects);
classInfo.OriginalZoneInfo.First = originalZoneInfoFirst;
classInfo.OriginalZoneInfo.Last = originalZoneInfoLast;
classInfo.CommitedZoneInfo.SetBasedOn(classInfo.OriginalZoneInfo);
// FIXME Convert block size to long ??
var realBlockSize = (int)(_fsi.GetPosition() - classInfoPosition);
if (blockSize != realBlockSize)
{
throw new OdbRuntimeException(
NDatabaseError.WrongBlockSize.AddParameter(blockSize).AddParameter(realBlockSize).AddParameter(
classInfoPosition));
}
return(classInfo);
}
