com.sk89q.worldedit.history.changeset

Class BlockOptimizedHistory

java.lang.Object

com.sk89q.worldedit.history.changeset.ArrayListHistory

com.sk89q.worldedit.history.changeset.BlockOptimizedHistory

All Implemented Interfaces:

ChangeSet

public class BlockOptimizedHistory
extends ArrayListHistory

An extension of ArrayListHistory that stores BlockChanges separately in two ArrayLists.

Whether this is a good idea or not is highly questionable, but this class exists because this is how history was implemented in WorldEdit for many years.

Constructor Summary

Constructors

Constructor and Description
BlockOptimizedHistory()

Method Summary

Modifier and Type	Method and Description
void	add(Change change) Add the given change to the history.
Iterator<Change>	backwardIterator() Get a backward directed iterator that can be used for undo.
Iterator<Change>	forwardIterator() Get a forward directed iterator that can be used for redo.
int	size() Get the number of stored changes.

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockOptimizedHistory

public BlockOptimizedHistory()

Method Detail

add

public void add(Change change)

Description copied from interface: ChangeSet

Add the given change to the history.

Specified by:

add in interface ChangeSet

Overrides:

add in class ArrayListHistory

Parameters:

change - the change

forwardIterator

public Iterator<Change> forwardIterator()

Description copied from interface: ChangeSet

Get a forward directed iterator that can be used for redo.

The iterator may return the changes out of order, as long as the final result after all changes have been applied is correct.

Specified by:

forwardIterator in interface ChangeSet

Overrides:

forwardIterator in class ArrayListHistory

Returns:

a forward directed iterator

backwardIterator

public Iterator<Change> backwardIterator()

Description copied from interface: ChangeSet

Get a backward directed iterator that can be used for undo.

The iterator may return the changes out of order, as long as the final result after all changes have been applied is correct.

Specified by:

backwardIterator in interface ChangeSet

Overrides:

backwardIterator in class ArrayListHistory

Returns:

a undo directed iterator

size

public int size()

Description copied from interface: ChangeSet

Get the number of stored changes.

Specified by:

size in interface ChangeSet

Overrides:

size in class ArrayListHistory

Returns:

the change count