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https://issues.apache.org/jira/browse/JEXL-307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16964825#comment-16964825
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Dmitri Blinov commented on JEXL-307:
------------------------------------
The following test throws NPE
{code:java}
@Test
public void testLexical() throws Exception {
JexlEngine Jexl = new
JexlBuilder().silent(false).strict(true).lexical(true).create();
JxltEngine Jxlt = Jexl.createJxltEngine();
JexlEvalContext ctxt = new JexlEvalContext(new MapContext());
JexlOptions options = ctxt.getEngineOptions();
// ensure errors will throw
options.setLexical(true);
String rpt
= "<report>\n"
+ "\n$$var y = 1; var x = 2;"
+ "\n${x + y}"
+ "\n</report>\n";
JxltEngine.Template t = Jxlt.createTemplate("$$", new
StringReader(rpt));
StringWriter strw = new StringWriter();
t.evaluate(ctxt, strw);
String output = strw.toString();
String ctl = "<report>\n\n3\n</report>\n";
Assert.assertEquals(ctl, output);
}
{code}
> Variable redeclaration option
> -----------------------------
>
> Key: JEXL-307
> URL: https://issues.apache.org/jira/browse/JEXL-307
> Project: Commons JEXL
> Issue Type: New Feature
> Affects Versions: 3.1
> Reporter: Dmitri Blinov
> Assignee: Henri Biestro
> Priority: Minor
> Fix For: 3.2
>
>
> As of now, JEXL allows a script writer to redeclare a local variable during
> script evaluation.
> {code:java}
> var a = 1; var a = 2;{code}
> This may lead to potential errors with misspelled names and clashed
> variables. Checking for already defined variable is a common feature of many
> languages. This feature can be implemented in JEXL as an additional option of
> JexlFeatures class, enabled by default, thus allowing compatibility with
> existing code.
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