public void executeAction(IAction<T> pAction) {
for (IActionListener<T> pActionListener : mActionListeners)
pActionListener.actionWillExecute(pAction);
mRollback.peek().push(pAction.getReverseAction(mPuzzle));
pAction.doAction(mPuzzle);
for (IActionListener<T> pActionListener : mActionListeners)
pActionListener.actionExecuted(pAction);
}
public void rollBack() {
if (mRollback.size() == 0)
throw new IllegalStateException("Could not rollback: nothing to rollback");
Stack<IAction<T>> actions = mRollback.pop();
while (!actions.isEmpty()) {
IAction<T> action = actions.pop();
for (IActionListener<T> pActionListener : mActionListeners)
pActionListener.actionWillExecute(action);
action.doAction(mPuzzle);
for (IActionListener<T> pActionListener : mActionListeners)
pActionListener.actionExecuted(action);
}
}