private List<String> getKnownImmutables(AnnotationNode node) {
final ArrayList<String> immutables = new ArrayList<String>();
final Expression expression = node.getMember(MEMBER_KNOWN_IMMUTABLES);
if (expression == null) return immutables;
if (!(expression instanceof ListExpression)) {
addError(
"Use the Groovy list notation [el1, el2] to specify known immutable property names via \""
+ MEMBER_KNOWN_IMMUTABLES
+ "\"",
node);
return immutables;
}
final ListExpression listExpression = (ListExpression) expression;
for (Expression listItemExpression : listExpression.getExpressions()) {
if (listItemExpression instanceof ConstantExpression) {
immutables.add((String) ((ConstantExpression) listItemExpression).getValue());
}
}
return immutables;
}