RandomAccessFile
inherits from InputStream
and is a base
class for: ReadableFile
for reading from a file; MemoryMappedFile
for
the same but with memory mapping; and BufferReader
for reading from a
buffer. Use these with the various table readers.
Factory
The $create()
factory methods instantiate the InputStream
object and
take the following arguments, depending on the subclass:
path
ForReadableFile
, a character file namex
ForBufferReader
, a Buffer or an object that can be made into a buffer viabuffer()
.
To instantiate a MemoryMappedFile
, call mmap_open()
.
Methods
$GetSize()
:$supports_zero_copy()
: Logical$seek(position)
: go to that position in the stream$tell()
: return the position in the stream$close()
: close the stream$Read(nbytes)
: read data from the stream, either a specifiednbytes
or all, ifnbytes
is not provided$ReadAt(position, nbytes)
: similar to$seek(position)$Read(nbytes)
$Resize(size)
: for aMemoryMappedFile
that is writeable