com.sk89q.worldedit.history.changeset

Interface ChangeSet

All Known Implementing Classes:

ArrayListHistory, BlockOptimizedHistory

public interface ChangeSet

Tracks a set of undoable operations and allows their undo and redo. The entirety of a change set should be undone and redone at once.

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.

Method Detail

add

void add(Change change)

Add the given change to the history.

Parameters:

change - the change

backwardIterator

Iterator<Change> backwardIterator()

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.

Returns:

a undo directed iterator

forwardIterator

Iterator<Change> forwardIterator()

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.

Returns:

a forward directed iterator

size

int size()

Get the number of stored changes.

Returns:

the change count