public RecordHolder(ClusteredFile file, UInt32 RecordNo, Record record)
{
RecordFinalized = new System.Threading.EventWaitHandle(false,
System.Threading.EventResetMode.ManualReset);
#if DUMP_FINALIZE
System.Diagnostics.Trace.WriteLine(file.mOriginalFile + " New RecordHolder for #" + RecordNo);
System.Diagnostics.Debug.Assert(record != null);
#endif
mFile = file;
mRecordNo = RecordNo;
MakeWeakRef(record);
mHold = record;
}
internal static DbfFile <TRecord> Get(string filePath, System.Text.Encoding encoding, DbfVersion version)
{
var file = ClusteredFile.Get <DbfFile <TRecord> >(filePath, OpenFileMode.OpenOrCreate, 4096);
if (file.ReaderCount == 1)
{
file.mEncoding = encoding;
file.mVersion = version;
file.Initialize();
}
else
{
// perhaps check encoding and version match
}
return(file);
}
static public T Get <T>(string filepath, OpenFileMode mode, int bufferSize)
where T : ClusteredFile, new()
{
var fi = new System.IO.FileInfo(filepath);
// in case the file is readonly we assume users expect us to force the OpenReadOnly mode.
if (fi.Exists && (fi.Attributes & FileAttributes.ReadOnly) != 0)
{
mode = OpenFileMode.OpenReadOnly;
}
ClusteredFile clusteredFile = null;
if (!mOpenFiles.TryGetValue(fi.FullName, out clusteredFile))
{
clusteredFile = new T();
mOpenFiles.Add(fi.FullName, clusteredFile);
}
FileMode fm;
FileAccess fa;
FileShare fs;
switch (mode)
{
case OpenFileMode.OpenOrCreate:
fm = FileMode.OpenOrCreate;
fa = FileAccess.ReadWrite;
fs = FileShare.Read;
break;
case OpenFileMode.OpenReadOnly:
fm = FileMode.Open;
fa = FileAccess.Read;
fs = FileShare.ReadWrite;
break;
default: // OpenFileMode.OpenReadWrite:
fm = FileMode.Open;
fa = FileAccess.ReadWrite;
fs = FileShare.Read;
break;
}
clusteredFile.InternalAddReader(fi, fm, fa, fs, bufferSize);
return((T)clusteredFile);
}
