[JEXL-383] Inconsistent behavior after overriding toBoolean method in JexlArithmetic

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.2.1
• Fix Version/s: 3.3
• Assignee: Henri Biestro
• Reporter: Xu Pengcheng
• Created: 02/Nov/22 10:45
• Updated: 27/Mar/23 10:59
• Resolved: 04/Nov/22 16:18

Description

I tried to overriding "toBoolean" method of JexlArithmetic for 'strict' mode.

@Override
public boolean toBoolean(final Object val) {
  if (val == null) {
    return false;
  } else {
    return super.toBoolean(val);
  }
} 

 while executing code:

parameters:

a: null

but while executing scripts, the behavior is inconsistent

if (a) return 1 else return 2;  // returns 2
if (!a) return 1 else return 2; // expects return 1 but throws exception: variable 'a' is null

 

what should I do to fix it? thanks!

-Pengcheng