private void replace(CtElement e, CtElement op) {
if (e instanceof CtStatement && op instanceof CtStatement) {
((CtStatement) e).replace((CtStatement) op);
return;
}
if (e instanceof CtExpression && op instanceof CtExpression) {
((CtExpression) e).replace((CtExpression) op);
return;
}
throw new IllegalArgumentException(e.getClass() + " " + op.getClass());
}
@Override
public void scan(final CtElement element) {
if (element != null && clazz.isAssignableFrom(element.getClass())) {
final T potentialVariable = (T) element;
if (name.equals(potentialVariable.getSimpleName())) {
// Since the AST is not completely available yet, we can not check if element's
// parent (ep) contains the innermost element of `stack` (ie). Therefore, we
// have to check if one of the following condition holds:
//
// 1) Does `stack` contain `ep`?
// 2) Is `ep` the body of one of `stack`'s CtExecutable elements?
//
// The first condition is easy to see. If `stack` contains `ep` then `ep` and
// all it's declared variables are in scope of `ie`. Unfortunately, there is a
// special case in which a variable (a CtLocalVariable) has been declared in a
// block (CtBlock) of, for instance, a method. Such a block is not contained in
// `stack`. This peculiarity calls for the second condition.
final CtElement parentOfPotentialVariable = potentialVariable.getParent();
for (final ASTPair astPair : stack) {
if (astPair.element == parentOfPotentialVariable) {
finish(potentialVariable);
return;
} else if (astPair.element instanceof CtExecutable) {
final CtExecutable executable = (CtExecutable) astPair.element;
if (executable.getBody() == parentOfPotentialVariable) {
finish(potentialVariable);
return;
}
}
}
}
}
super.scan(element);
}