Package org.deepjava.runtime.mpc555.driver.ffs

Class Rider

java.lang.Object

org.deepjava.runtime.mpc555.driver.ffs.Rider

public class Rider
extends Object

Rider, to be placed onto a file
multiple riders might be placed for reading and writing

Field Summary

Fields

Modifier and Type	Field	Description
boolean	eof	end of file reached
int	res	result of last operation = 0, operation successful = 1, end of file reached = 2, file does not exist = 3, no blocks left in file system = 4, max number of blocks for this file is exceeded = 5, writing not at end of file

Constructor Summary

Constructors

Constructor	Description
Rider()

Method Summary

Modifier and Type	Method	Description
File	base()	Returns file associated with this rider.
int	pos()	Returns position of rider.
boolean	readBool()	reads boolean
byte	readByte()	reads byte
int	readInt()	reads int
short	readShort()	reads short
void	set(File f, int pos)	sets rider at position if pos < 0, sets position to 0 if pos > length of file, sets position to file.len
void	writeBool(boolean x)	writes boolean
void	writeByte(byte x)	writes byte
void	writeInt(int x)	writes int
void	writeShort(short x)	writes short

Methods inherited from class java.lang.Object

equals, getClass, hashCode, toString

Field Detail

eof

public boolean eof

end of file reached

res

public int res

result of last operation = 0, operation successful = 1, end of file reached = 2, file does not exist = 3, no blocks left in file system = 4, max number of blocks for this file is exceeded = 5, writing not at end of file

Constructor Detail

Rider

public Rider()

Method Detail

set

public void set(File f,
                int pos)

sets rider at position if pos < 0, sets position to 0 if pos > length of file, sets position to file.len

Parameters:

f - file

pos - position (in number of bytes)

pos

public int pos()

Returns position of rider.

Returns:

Position of rider in byte offset.

base

public File base()

Returns file associated with this rider.

Returns:

File where this rider is placed on.

readBool

public boolean readBool()

reads boolean

Returns:

Boolean value.

readByte

public byte readByte()

reads byte

Returns:

Byte value.

readShort

public short readShort()

reads short

Returns:

Short value.

readInt

public int readInt()

reads int

Returns:

Integer value.

writeBool

public void writeBool(boolean x)

writes boolean

Parameters:

x - Boolean value.

writeByte

public void writeByte(byte x)

writes byte

Parameters:

x - Byte value.

writeShort

public void writeShort(short x)

writes short

Parameters:

x - Short value.

writeInt

public void writeInt(int x)

writes int

Parameters:

x - Integer value.