Module org.apache.wicket.util

Package org.apache.wicket.util.diff.myers

Class PathNode

java.lang.Object

org.apache.wicket.util.diff.myers.PathNode

Direct Known Subclasses:

DiffNode, Snake

public abstract class PathNode
extends Object

A node in a diffpath.

Version:

$Revision: 1.1 $ $Date: 2006/03/12 00:24:21 $

Author:

Juanco Anez

See Also:

• DiffNode
• Snake

Field Summary

Fields

Modifier and Type	Field	Description
final int	i	Position in the original sequence.
final int	j	Position in the revised sequence.
final PathNode	prev	The previous node in the path.

Constructor Summary

Constructors

Constructor	Description
PathNode(int i, int j, PathNode prev)	Concatenates a new path node with an existing diffpath.

Method Summary

Modifier and Type	Method	Description
boolean	isBootstrap()	Is this a bootstrap node?
abstract boolean	isSnake()	Is this node a Snake node?
final PathNode	previousSnake()	Skips sequences of DiffNodes until a Snake or bootstrap node is found, or the end of the path is reached.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

i

public final int i

Position in the original sequence.

j

public final int j

Position in the revised sequence.

prev

public final PathNode prev

The previous node in the path.

Constructor Details

PathNode

public PathNode(int i,
 int j,
 PathNode prev)

Concatenates a new path node with an existing diffpath.

Parameters:

i - The position in the original sequence for the new node.

j - The position in the revised sequence for the new node.

prev - The previous node in the path.

Method Details

isSnake

public abstract boolean isSnake()

Is this node a Snake node?

Returns:

true if this is a Snake node

isBootstrap

public boolean isBootstrap()

Is this a bootstrap node?

In bootstrap nodes one of the two coordinates is less than zero.

Returns:

true if this is a bootstrap node.

previousSnake

public final PathNode previousSnake()

Skips sequences of DiffNodes until a Snake or bootstrap node is found, or the end of the path is reached.

Returns:

The next first Snake or bootstrap node in the path, or null if none found.

toString

public String toString()

Overrides:

toString in class Object