com.fasteasytrade.JRandTest.IO
Class FileRandomStream

java.lang.Object
  com.fasteasytrade.JRandTest.IO.FileRandomStream

All Implemented Interfaces:

RandomStream

Direct Known Subclasses:

FileAlgoRandomStream

public class FileRandomStream

extends Object

implements RandomStream

This class represents an encrypted or random source file. Data, bytes or int32, are read from file.

Author:

Zur Aougav

Field Summary

int	actualSize
byte[]	buffer
int	count
int	countLastRead
String	filename
(package private) BufferedInputStream	infile
boolean	open
int	SIZE

Constructor Summary

FileRandomStream()

FileRandomStream(String s)

Method Summary

boolean	closeInputStream() close the input stream.
void	finalize() Be sure to close input file at end of processing.
String	getFilename() get the file name to be processed. this file is the raw data to be read, or the input file processed by algorithm.
boolean	isOpen() check if RandomStream is open
boolean	openInputStream() open the input stream.
byte	readByte() read one byte from a file.
int	readInt() Processing is similar to readByte.
long	readLong() Processing is similar to readByte.
void	setFilename(String s) set file name to be processed. this file is the raw data to be read, or the input file processed by algorithm.

Methods inherited from class java.lang.Object

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

Field Detail

open

public boolean open

infile

BufferedInputStream infile

filename

public String filename

count

public int count

SIZE

public int SIZE

countLastRead

public int countLastRead

actualSize

public int actualSize

buffer

public byte[] buffer

Constructor Detail

FileRandomStream

public FileRandomStream()

FileRandomStream

public FileRandomStream(String s)

Method Detail

getFilename

public String getFilename()

Description copied from interface: RandomStream

get the file name to be processed. this file is the raw data to be read, or the input file processed by algorithm.

Specified by:

getFilename in interface RandomStream

Returns:

string null if missing, else the filename from setFilename.

See Also:

RandomStream.getFilename()

setFilename

public void setFilename(String s)

Description copied from interface: RandomStream

set file name to be processed. this file is the raw data to be read, or the input file processed by algorithm.

Specified by:

setFilename in interface RandomStream

Returns:

true if open (still data in stream), else flase

See Also:

RandomStream.setFilename(java.lang.String)

isOpen

public boolean isOpen()

Description copied from interface: RandomStream

check if RandomStream is open

Specified by:

isOpen in interface RandomStream

Returns:

true if open (still data in stream), else flase

See Also:

RandomStream.isOpen()

openInputStream

public boolean openInputStream()
                        throws Exception

Description copied from interface: RandomStream

open the input stream.

Specified by:

openInputStream in interface RandomStream

Returns:

boolean true for success, else false.

Throws:

Exception - - Usually IOException.

See Also:

RandomStream.openInputStream()

closeInputStream

public boolean closeInputStream()

Description copied from interface: RandomStream

close the input stream.

Specified by:

closeInputStream in interface RandomStream

Returns:

boolean true for success, else false.

See Also:

RandomStream.closeInputStream()

readByte

public byte readByte()
              throws Exception

Description copied from interface: RandomStream

read one byte from a file.

first time ( if !isOpen() ) open file/stream, and return byte

at end of file close stream and returns -1

Specified by:

readByte in interface RandomStream

Returns:

byte read form stream, -1 if passed end of file

Throws:

Exception

See Also:

RandomStream.readByte()

readInt

public int readInt()
            throws Exception

Description copied from interface: RandomStream

Processing is similar to readByte.

Specified by:

readInt in interface RandomStream

Returns:

int (32 bits, 4 bytes) read form stream, -1 if passed end of file

Throws:

Exception

See Also:

RandomStream.readInt()

readLong

public long readLong()
              throws Exception

Description copied from interface: RandomStream

Processing is similar to readByte.

Specified by:

readLong in interface RandomStream

Returns:

long (64 bits, 8 bytes) read form stream, -1 if passed end of file

Throws:

Exception

See Also:

RandomStream.readLong()

finalize

public void finalize()

Be sure to close input file at end of processing.