Class Directfile

java.lang.Object

svm.env.dataset.Dataset

svm.env.dataset.ImageFile

svm.env.dataset.Directfile

public class Directfile
extends ImageFile

Directfile Bridge.

Link to GitHub: Source File.

Author:

Simula Standard, S-Port: The Environment Interface, Øystein Myhre Andersen

Field Summary

Fields

Modifier and Type	Field	Description
int	MAXLOC	The variable MAXLOC indicates the maximum possible location on the external file.
private RandomAccessFile	randomAccessFile	The underlying RandomAccessFile used.
(package private) int	RECORDSIZE	The variable "RECORDSIZE" is the fixed size of all external images.

Fields inherited from class ImageFile

imglng

Fields inherited from class Dataset

FIL_DIRECTBYTEFILE, FIL_DIRECTFILE, FIL_INBYTEFILE, FIL_INFILE, FIL_OUTBYTEFILE, FIL_OUTFILE, FIL_PRINTFILE, fileAction, fileName, fileType, KEY_SYSIN, KEY_SYSOUT, KEY_SYSTRACE

Constructor Summary

Constructors

Constructor	Description
Directfile(String fileName, int type, String action, int imglng)	Construct a new DirectfileSpec with the given arguments.

Method Summary

Modifier and Type	Method	Description
void	clfile()	Close the underlying file
int	inimage(ObjectAddress chrAddr, int nchr)	Reads a line from the underlying file into a character area
int	lastloc()	Returns the last location
void	locate(int pos)	Locate the given 'pos' on the underlying RandomAccessFile
void	outimage(String image)	Writes outimage to the underlying file
private String	readLine()	Utility: read a line from the underlying RandomAccessFile

Methods inherited from class ImageFile

breakOutimage

Methods inherited from class Dataset

edFileType, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

randomAccessFile

private RandomAccessFile randomAccessFile

The underlying RandomAccessFile used.

RECORDSIZE

int RECORDSIZE

The variable "RECORDSIZE" is the fixed size of all external images. It is set by "open" and subdivide the external file into series of external images, without any image separating characters.

MAXLOC

public int MAXLOC

The variable MAXLOC indicates the maximum possible location on the external file. If this is not meaningful MAXLOC has the value of "maxint"-1. The procedure "maxloc" gives access to the current MAXLOC value.

Constructor Details

Directfile

public Directfile(String fileName,
 int type,
 String action,
 int imglng)

Construct a new DirectfileSpec with the given arguments.

Parameters:

fileName - the fileName

type - the fileType

action - the action string

imglng - the image length

Method Details

clfile

public void clfile()

Description copied from class: Dataset

Close the underlying file

Overrides:

clfile in class Dataset

inimage

public int inimage(ObjectAddress chrAddr,
 int nchr)

Description copied from class: ImageFile

Reads a line from the underlying file into a character area

Overrides:

inimage in class ImageFile

Parameters:

chrAddr - the start of the area

nchr - the length of the area

Returns:

the number of characters filled

readLine

private String readLine()

Utility: read a line from the underlying RandomAccessFile

Returns:

the line read

outimage

public void outimage(String image)

Description copied from class: ImageFile

Writes outimage to the underlying file

Overrides:

outimage in class ImageFile

Parameters:

image - the image string to be written

locate

public void locate(int pos)

Locate the given 'pos' on the underlying RandomAccessFile

Parameters:

pos - the position to locate

lastloc

public int lastloc()

Returns the last location

Returns:

the last location