private RecordLockedData CreateLockData(OpenFileItemData itemParam, ref LogicFileInfoData logicFileInfo, Guid userID, DbTransaction trans)
{
RecordLockedData result = null;
FileAccess access = itemParam.FileAccess;
FileMode mode = itemParam.FileMode;
long fileLength = -1;
if (mode == FileMode.Truncate)
{
access |= FileAccess.Write;
fileLength = 0;
}
bool canWrite = (access & FileAccess.Write) != 0;
if (canWrite)
{
if (logicFileInfo == null)
{
logicFileInfo = CreateNewFile(itemParam, userID, trans);
}
else
{
logicFileInfo = UpdateFile(itemParam, logicFileInfo, fileLength, userID, trans);
}
if (logicFileInfo != null)
{
result = Lock(logicFileInfo.ID, userID);
}
}
return(result);
}
private LogicFileInfoData UpdateFile(OpenFileItemData itemParam, LogicFileInfoData logicFileInfo, long fileLength, Guid userID, DbTransaction trans)
{
LogicFileInfoData result = logicFileInfo;
UpdateMode updateMode = itemParam.UpdateMode;
FileMode mode = itemParam.FileMode;
long length = 0;
if (updateMode == UpdateMode.None)
{
updateMode = UpdateMode.Override;
}
if (updateMode == UpdateMode.NewVersion)
{
PhysicalFileInfoData oldFileData = logicFileInfo.PhysicalFileInfos[logicFileInfo.PhysicalFileInfos.Count - 1];
Guid physcicalFileID = CombineGuid.NewComboGuid();
switch (mode)
{
case FileMode.Truncate:
case FileMode.Create:
FileStorageManager.SetFileLength(this.DataProvider, physcicalFileID, result.LogicFileExt, 0);
break;
default:
length = FileStorageManager.CopyFile(this.DataProvider, oldFileData.ID, physcicalFileID, logicFileInfo.LogicFileExt);
break;
}
PhysicalFileInfoData fileData = new PhysicalFileInfoData();
fileData.ID = physcicalFileID;
fileData.LogicFileID = result.ID;
fileData.FileLength = length;
fileData.Version = GetFileVersion(logicFileInfo, trans);
fileData.StoreModeID = FileStorageManager.GetCurrentStoreModeID(this.DataProvider);
this.DataProvider.CreatePhysicalFileInfo(fileData, trans);
result.PhysicalFileInfos.Add(fileData);
result.LatestPhysicalFileID = physcicalFileID;
this.DataProvider.UpdateFileInfo(logicFileInfo, trans);
}
else if (updateMode == UpdateMode.Override)
{
switch (mode)
{
case FileMode.Truncate:
case FileMode.Create:
FileStorageManager.SetFileLength(this.DataProvider, logicFileInfo.LatestPhysicalFileID, result.LogicFileExt, 0);
break;
}
}
return(result);
}