We're calling things like new Long("1") with a string constant. Here we should use Long.valueOf(1L) rather than calling the constructor, and we shouldn't use a string we should use a constant. At a minimum this should be Long.valueOf("1") if somehow we can't properly generate the constant value.

Here's something that shows up in some generated code:

public static List<Range<Long>> length()

Here's another example:
public RuleBuilder setOrder(Integer value) {
if (value != null) {
boolean isValidRange = false;
List<Range<Integer>> rangeConstraints = new ArrayList<>();
rangeConstraints.add(Range.closed(new Integer("0"), new Integer("2147483647")));
for (Range<Integer> r : rangeConstraints) {
if (r.contains(value))

}
if (!isValidRange)

}

this._order = value;
return this;
}