public DscIOStream(string streamName, FileAccess access, DscCompressionScheme compressionScheme) { if (String.IsNullOrEmpty(streamName)) { throw new ArgumentNullException("streamName"); } Uri streamUri = new Uri(streamName); this.m_dscClient = new DscService(streamUri.Host); this.m_fileSetName = streamUri.LocalPath; this.m_mode = access; this.m_fstream = null; this.m_atEOF = false; this.m_compressionScheme = compressionScheme; if (access == FileAccess.Read) { this.m_dscFileSet = this.m_dscClient.GetFileSet(streamName); this.m_dscFileEnumerator = this.m_dscFileSet.GetFiles().GetEnumerator(); } else if (access == FileAccess.Write) { this.m_dscFileSet = this.m_dscClient.CreateFileSet(streamName, compressionScheme); } else { throw new ArgumentException(SR.ReadWriteNotSupported, "access"); } }
public DscIOStream(string streamName, FileAccess access, FileMode createMode, DscCompressionScheme compressionScheme) { if (String.IsNullOrEmpty(streamName)) { throw new ArgumentNullException("streamName"); } Uri streamUri = new Uri(streamName); this.m_dscClient = new DscService(streamUri.Host); this.m_fileSetName = streamUri.LocalPath.TrimStart('/'); this.m_mode = access; this.m_compressionScheme = compressionScheme; bool streamExists = this.m_dscClient.FileSetExists(this.m_fileSetName); if (access == FileAccess.Read) { switch (createMode) { case FileMode.Open: case FileMode.OpenOrCreate: if (!streamExists) { throw new FileNotFoundException(String.Format(SR.StreamDoesNotExist, streamName)); } break; case FileMode.Append: case FileMode.Create: case FileMode.CreateNew: case FileMode.Truncate: throw new NotSupportedException(); } this.m_dscFileSet = this.m_dscClient.GetFileSet(streamName); this.m_dscFileEnumerator = this.m_dscFileSet.GetFiles().GetEnumerator(); } else if (access == FileAccess.Write) { switch (createMode) { case FileMode.Append: if (!streamExists) { this.m_dscFileSet = this.m_dscClient.CreateFileSet(this.m_fileSetName, this.m_compressionScheme); } break; case FileMode.Create: if (streamExists) { this.m_dscClient.DeleteFileSet(this.m_fileSetName); } this.m_dscFileSet = this.m_dscClient.CreateFileSet(this.m_fileSetName, this.m_compressionScheme); break; case FileMode.CreateNew: if (streamExists) { throw new IOException(String.Format(SR.StreamAlreadyExists, streamName)); } break; case FileMode.Truncate: if (streamExists) { this.m_dscClient.DeleteFileSet(this.m_fileSetName); } this.m_dscFileSet = this.m_dscClient.CreateFileSet(this.m_fileSetName, this.m_compressionScheme); break; case FileMode.Open: case FileMode.OpenOrCreate: // TODO: this should be dealt with correctly, // although it's not obvious what open should do throw new NotSupportedException(); } } else { throw new ArgumentException(SR.ReadWriteNotSupported, "access"); } this.m_fstream = null; this.m_atEOF = false; }