@Override
public Transformation peek() {
if (stack.isEmpty()) {
return TransformationFactory.getIdentity();
} else {
return stack.peek();
}
}
@Override
public Transformation pop() {
Transformation value = stack.pop();
if (value == null) {
value = TransformationFactory.getIdentity();
}
fireChanged(TransformationStackEvent.POPPED, value);
return value;
}
