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From "Henri Biestro (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JEXL-136) Script calls within scripts may fail with number arguments
Date Mon, 09 Jul 2012 19:05:35 GMT
Henri Biestro created JEXL-136:
----------------------------------

             Summary: Script calls within scripts may fail with number arguments
                 Key: JEXL-136
                 URL: https://issues.apache.org/jira/browse/JEXL-136
             Project: Commons JEXL
          Issue Type: Bug
    Affects Versions: 2.1.1
            Reporter: Henri Biestro
            Assignee: Henri Biestro
             Fix For: 2.1.2, 3.0


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.

{code}
       @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);
        }
{code}

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