[jira] [Issue Comment Deleted] (NIFI-4407) Non-EL statement processed as expression language

["Otto Fowler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-4407?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Otto Fowler updated NIFI-4407:
------------------------------
    Comment: was deleted

(was: I don't think validateExpression or the Range are  documented enough to understand what is going on.

in the test:
{code:java}
try {
    Query.validateExpression("$${attr}", false);
    Assert.fail("invalid query validated");
} catch (final AttributeExpressionLanguageParsingException e) {
}

Query.validateExpression("$${attr}", true);

{code}
the bottom expression doesn't throw or fail, but that is because nothing is ever compiled...

 

Can I ask why, when there is a grammar, does nifi manually validate?  It is harder when the grammar has one set of rules, then then other rules that might be expressed in the grammar are over laid.)

> Non-EL statement processed as expression language
> -------------------------------------------------
>
>                 Key: NIFI-4407
>                 URL: https://issues.apache.org/jira/browse/NIFI-4407
>             Project: Apache NiFi
>          Issue Type: Bug
>    Affects Versions: 1.0.0, 1.1.0, 1.2.0, 1.1.1, 1.0.1, 1.3.0
>            Reporter: Pierre Villard
>            Priority: Critical
>
> If you take a GFF with custom text: {{test$$foo}}
> The generated text will be: {{test$foo}}
> The property supports expression language and one $ is removed during the EL evaluation step. This can be an issue if a user wants to use a value containing to consecutive $$ (such as in password fields).



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