[JEXL-192] Invalid return type when expected result is null

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.0
• Fix Version/s: 3.1
• Assignee: Henri Biestro
• Reporter: Constantin Mitocaru
• Created: 22/Mar/16 13:13
• Updated: 29/Jun/21 06:59
• Resolved: 22/Mar/16 16:25

Description

In jexl2 this code correctly outputs the line:

null

        JexlEngine jexl = new JexlEngine();
        Record r = new Record();
        r.setHeader(new RecordHeader());
        JexlContext jc = new MapContext();
        jc.set("r", r );
        jc.set("com.s.objects.record.RecordUtils", com.s.objects.record.RecordUtils.class );
        Expression e = jexl.createExpression( "com.s.objects.record.RecordUtils.getHeaderAgeOrResolveItFromDOB(r)" );
        System.out.println( e.evaluate(jc) );        

The signature of the method getHeaderAgeOrResolveItFromDOB() is:

        public static Integer getHeaderAgeOrResolveItFromDOB( final Record rec ) {
        ...
        }

But in jexl3 this code produces:

	class com.s.objects.record.RecordUtils

        JexlEngine jexl = new JexlBuilder().create();
        Record r = new Record();
        r.setHeader(new RecordHeader());
        JexlContext jc = new MapContext();
        jc.set("r", r );
        jc.set("com.s.objects.record.RecordUtils", com.s.objects.record.RecordUtils.class );
        JexlExpression e = jexl.createExpression( "com.s.objects.record.RecordUtils.getHeaderAgeOrResolveItFromDOB(r)" );
        System.out.println( e.evaluate(jc) );        

So it returns the class of the utility rather than the value null! For non null values it returns the proper type (Integer);

I think jexl3 version 3.0 was not really ready for prime time.
I really screwed up my project upgrading to 3.0.
When do you guys anticipate to release 3.1?
Is there a way to work with a snapshot after this fix?