org.apache.wicket.util.diff.myers.DiffNode Maven / Gradle / Ivy
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* This software consists of voluntary contributions made by many
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*
* Title:
*
*
* Description:
*
*
* Copyright: Copyright (c) 2002
*
*
* Company:
*
*
* @author not attributable
* @version 1.0
*/
/**
* A diffnode in a diffpath.
*
* A DiffNode and its previous node mark a delta between two input sequences, that is, two differing
* subsequences between (possibly zero length) matching sequences.
*
* {@link DiffNode DiffNodes} and {@link Snake Snakes} allow for compression of diffpaths, as each
* snake is represented by a single {@link Snake Snake} node and each contiguous series of
* insertions and deletions is represented by a single {@link DiffNode DiffNodes}.
*
* @version $Revision: 1.1 $ $Date: 2006/03/12 00:24:21 $
* @author Juanco Anez
*
*/
public final class DiffNode extends PathNode
{
/**
* Constructs a DiffNode.
*
* DiffNodes are compressed. That means that the path pointed to by the prev
* parameter will be followed using {@link PathNode#previousSnake} until a non-diff node is
* found.
*
* @param i
* the position in the original sequence
* @param j
* the position in the revised sequence
* @param prev
* the previous node in the path.
*/
public DiffNode(final int i, final int j, final PathNode prev)
{
super(i, j, (prev == null ? null : prev.previousSnake()));
}
/**
* {@inheritDoc}
*
* @return false, always
*/
@Override
public boolean isSnake()
{
return false;
}
}