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Project: I/O Utility Classes
Unit: PJPipeFilters
Applies to: ~>1.0
This pipe filter class constructs valid ANSI strings from chunks of data read from a pipe.
An event is triggered for each string read. Strings are also parsed into lines that are divided by a specified end of line marker. Each complete line read is notified to the user via another event.
The class only works for Single Byte Character Set (SBCS) strings, i.e. those that take exactly one byte per character. It is the caller’s responsibility to interpret the string’s code page correctly.
TPJAnsiSBCSPipeFilter descends from TPJPipeFilter
The only method introduced in this class is an override of TObject.AfterConstruction to set default property values. There is no need to call this method directly.
| Method | Description |
|---|---|
| Create | Object constructor. Sets up object to filter a specified pipe. |
| ReadPipe | Reads all available data from the pipe. |
| Flush | Flushes any unprocessed buffered data. |
| HaveUnprocessedData | Checks there is currently any buffered, unprocessed, data. |
| Property | Description |
|---|---|
| EOLMarker | End of line marker used when parsing text into lines. |
| Property | Description |
|---|---|
| Pipe | Read only property providing access to the pipe that is being filtered. |
| Event | Description |
|---|---|
| OnLineEnd | Event triggered when each end of line is reached. |
| OnText | Event triggered whenever valid text is read from pipe. |
No events are inherited.