[JEXL-136] Script calls within scripts may fail with number arguments

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.1
• Fix Version/s: 2.1.2, 3.0
• Assignee: Henri Biestro
• Reporter: Henri Biestro
• Created: 09/Jul/12 19:04
• Updated: 21/Mar/16 14:10
• Resolved: 09/Jul/12 19:10

Description

Jexl attempts to narrow arguments when solving function names; unfortunately,
this may cause issues when the function is a script and the argument type is expected to remain untouched.

The map key in the following code is an Integer; by calling the function fn01, the interpreter fails to find a method and retries after 'narrowing' the argument which becomes a Byte. The Byte is not equal to the Integer map key with the same value; the test fails.

       @Test
        public void test136() throws Exception {
            JexlEngine jexl = new Engine();
            JexlContext jc = new MapContext();
            JexlScript script;
            JexlExpression expr;
            Object result;

            script = jexl.createScript("var x = $TAB[idx]; return x;", "idx");
            jc.set("fn01", script);

            script = jexl.createScript("$TAB = { 1:11, 2:22, 3:33}; IDX=2;");
            script.execute(jc);

            expr = jexl.createExpression("fn01(IDX)");
            result = expr.evaluate(jc);
            assertEquals("EXPR01 result", 22, result);
        }