TDataPacketReader

Implements a data packet reader for TBufDataset.

Declaration

Source position: bufdataset.pas line 408

Description

TDataPacketReader is a TObject descendant which implements a data packet reader for TBufDataset. TDataPacketReader is a concept borrowed from TClientDatset in Delphi. Data packets are used to access the values in its dataset. Data packets can contain field definitions or record data. Data packets can store their values in binary format or as an XML document.

TDataPacketReader provides properties and methods that allow access to the field definitions, field values, and row states for record buffers in its dataset. Methods are provided to load and save field definitions or record data using a stream. Methods are provided to recognize the storage format for the data packets in the stream.

Many of the methods in TDataPacketReader are declared as virtual or abstract. They are implemented in descendent classes that use a specific data packet format, such as TFpcBinaryDatapacketReader or TXMLDatapacketReader (in xmldatapacketreader.pp).

See also