loci.formats.codec

Class LZWTreeNode

java.lang.Object

loci.formats.codec.LZWTreeNode

public class LZWTreeNode
extends Object

An LZW-compression helper class for building a symbol table in tree format.

Source code:

Trac, SVN

Author:

Curtis Rueden ctrueden at wisc.edu

Field Summary

Fields

Modifier and Type	Field and Description
protected LZWTreeNode[]	children List of up to 256 children.
protected int	theCode Code corresponding to this node.

Constructor Summary

Constructors

Constructor and Description
LZWTreeNode(int code) Constructs a new LZW symbol tree node.

Method Summary

Methods

Modifier and Type	Method and Description
void	addChild(int index, LZWTreeNode node) Sets this node's indexth child to match the given node.
void	addTableEntry(ByteVector string, int code) Adds the given code for the specified byte sequence.
int	codeFromString(ByteVector string) Gets the code for the given byte sequence, or -1 if none.
LZWTreeNode	getChild(byte index) Gets this node's indexth child.
int	getCode() Gets the code corresponding to this node.
void	initialize() Initializes this node as the root of the symbol table.
LZWTreeNode	nodeFromString(ByteVector string) Gets the node for the given byte sequence, or null if none.

Methods inherited from class java.lang.Object

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

Field Detail

children

protected LZWTreeNode[] children

List of up to 256 children.

theCode

protected int theCode

Code corresponding to this node.

Constructor Detail

LZWTreeNode

public LZWTreeNode(int code)

Constructs a new LZW symbol tree node.

Method Detail

initialize

public void initialize()

Initializes this node as the root of the symbol table.

getCode

public int getCode()

Gets the code corresponding to this node.

getChild

public LZWTreeNode getChild(byte index)

Gets this node's indexth child.

addChild

public void addChild(int index,
            LZWTreeNode node)

Sets this node's indexth child to match the given node.

codeFromString

public int codeFromString(ByteVector string)

Gets the code for the given byte sequence, or -1 if none.

nodeFromString

public LZWTreeNode nodeFromString(ByteVector string)

Gets the node for the given byte sequence, or null if none.

addTableEntry

public void addTableEntry(ByteVector string,
                 int code)

Adds the given code for the specified byte sequence.