Reader
abstract class Reader < Object
Abstract reader.
Typical use is to use the Reader factory function to instantiate an
object of an appropriate derived class based on the file extension of the
given path:
auto reader <- Reader(path);
A read of a single buffer can then be performed with:
reader.read(buffer);
Finally, close the file:
reader.close();
Factory Functions
| Name | Description |
|---|---|
| Reader | Create a reader for a file. |
Member Functions
| Name | Description |
|---|---|
| open | Open a file. |
| read | Read the entire contents of the file. |
| close | Close the file. |
Member Fibers
| Name | Description |
|---|---|
| walk | Read the contents of the file sequentially. |
Factory Function Details
function Reader(path:String) -> Reader
Create a reader for a file.
- path: Path of the file.
Returns: the reader.
The file extension of path is used to determine the precise type of the
returned object. Supported file extension are .json and .yml.
Member Function Details
close
abstract function close()
Close the file.
open
read
abstract function read(buffer:MemoryBuffer)
Read the entire contents of the file.
- buffer: Buffer into which to read.
Member Fiber Details
walk
abstract fiber walk() -> Buffer
Read the contents of the file sequentially.
Yields: A buffer for each element of the top level sequence.
For a file that consists of a sequence at the top level, yields each element of that sequence one at a time, to avoid reading the whole file into memory at once.