/// <inheritdoc/>
public override Stream OpenStream(string url, VirtualFileMode mode, VirtualFileAccess access, VirtualFileShare share = VirtualFileShare.Read, StreamFlags streamFlags = StreamFlags.None)
{
// Open or create the file through the underlying (IContentIndexMap, IOdbBackend) couple.
// Also read/write a ObjectHeader.
if (mode == VirtualFileMode.Open)
{
ObjectId objectId;
if (url.StartsWith(ObjectIdUrl))
{
ObjectId.TryParse(url.Substring(ObjectIdUrl.Length), out objectId);
}
else if (!contentIndexMap.TryGetValue(url, out objectId))
{
throw new FileNotFoundException(string.Format("Unable to find the file [{0}]", url));
}
var result = objectDatabase.OpenStream(objectId, mode, access, share);
// copy the stream into a memory stream in order to make it seek-able
if (streamFlags == StreamFlags.Seekable && !result.CanSeek)
{
var buffer = new byte[result.Length - result.Position];
result.Read(buffer, 0, buffer.Length);
return(new DatabaseReadFileStream(objectId, new MemoryStream(buffer), 0));
}
return(new DatabaseReadFileStream(objectId, result, result.Position));
}
if (mode == VirtualFileMode.Create)
{
if (url.StartsWith(ObjectIdUrl))
{
throw new NotSupportedException();
}
var stream = objectDatabase.CreateStream();
// Header will be written by DatabaseWriteFileStream
var result = new DatabaseWriteFileStream(stream, stream.Position);
stream.Disposed += x =>
{
// Commit index changes
contentIndexMap[url] = x.CurrentHash;
};
return(result);
}
throw new ArgumentException("mode");
}
/// <inheritdoc/>
public override Stream OpenStream(string url, VirtualFileMode mode, VirtualFileAccess access, VirtualFileShare share = VirtualFileShare.Read, StreamFlags streamFlags = StreamFlags.None)
{
// Open or create the file through the underlying (IContentIndexMap, IOdbBackend) couple.
// Also read/write a ObjectHeader.
if (mode == VirtualFileMode.Open)
{
ObjectId objectId;
if (url.StartsWith(ObjectIdUrl))
ObjectId.TryParse(url.Substring(ObjectIdUrl.Length), out objectId);
else if (!contentIndexMap.TryGetValue(url, out objectId))
throw new FileNotFoundException(string.Format("Unable to find the file [{0}]", url));
var result = objectDatabase.OpenStream(objectId, mode, access, share);
// copy the stream into a memory stream in order to make it seek-able
if (streamFlags == StreamFlags.Seekable && !result.CanSeek)
{
var buffer = new byte[result.Length - result.Position];
result.Read(buffer, 0, buffer.Length);
return new DatabaseReadFileStream(objectId, new MemoryStream(buffer), 0);
}
return new DatabaseReadFileStream(objectId, result, result.Position);
}
if (mode == VirtualFileMode.Create)
{
if (url.StartsWith(ObjectIdUrl))
throw new NotSupportedException();
var stream = objectDatabase.CreateStream();
// Header will be written by DatabaseWriteFileStream
var result = new DatabaseWriteFileStream(stream, stream.Position);
stream.Disposed += x =>
{
// Commit index changes
contentIndexMap[url] = x.CurrentHash;
};
return result;
}
throw new ArgumentException("mode");
}
