org.terrier.compression.bit

Class LinkedBuffer

java.lang.Object

org.terrier.compression.bit.LinkedBuffer

public class LinkedBuffer
extends Object

Implements an element of a linked list that contains a byte array

Author:

Roi Blanco

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	buffer The internal buffer.
protected int	bufferSize The size of the internal buffer
static int	DEFAULT_BUFFER_SIZE The default size of the internal buffer in bytes The buffer has to be big enough to allocate a single write, i.e we cannot write *at once* more than bufferSize bytes
protected LinkedBuffer	next The next buffer in the list

Constructor Summary

Constructors

Constructor and Description
LinkedBuffer() Default Constructor.
LinkedBuffer(int _bufferSize) Constructor

Method Summary

Modifier and Type	Method and Description
byte[]	getBuffer()
int	getBufferSize()
LinkedBuffer	getNext()
int	getPosition()
void	setNext(LinkedBuffer _next) Set the next buffer in the list
boolean	write(int b) Writes a byte in the buffer
boolean	writeByte(byte b) Writes a byte in the buffer

Methods inherited from class java.lang.Object

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

Field Detail

buffer

protected byte[] buffer

The internal buffer.

bufferSize

protected int bufferSize

The size of the internal buffer

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

The default size of the internal buffer in bytes The buffer has to be big enough to allocate a single write, i.e we cannot write *at once* more than bufferSize bytes

See Also:

Constant Field Values

next

protected LinkedBuffer next

The next buffer in the list

Constructor Detail

LinkedBuffer

public LinkedBuffer()

Default Constructor. Uses a buffer of DEFAULT_BUFFER_SIZE bytes size.

LinkedBuffer

public LinkedBuffer(int _bufferSize)

Constructor

Parameters:

_bufferSize - size in bytes of the buffer.

Method Detail

getNext

public LinkedBuffer getNext()

Returns:

the next linked buffer in the list (or null)

setNext

public void setNext(LinkedBuffer _next)

Set the next buffer in the list

Parameters:

_next - next LinkedBuffer in the list

write

public boolean write(int b)
              throws IOException

Writes a byte in the buffer

Parameters:

b - int containing the byte to write

Returns:

true iff the buffer has used all its capacity

Throws:

IOException

writeByte

public boolean writeByte(byte b)
                  throws IOException

Writes a byte in the buffer

Parameters:

b - byte to write

Returns:

true iff the buffer has used all its capacity

Throws:

IOException

getBufferSize

public int getBufferSize()

Returns:

The size of the buffer

getPosition

public int getPosition()

Returns:

The current position in the buffer

getBuffer

public byte[] getBuffer()

Returns:

The byte buffer (byte[])