[jira] [Commented] (CAMEL-20337) Syntax check of simple expression in filter eip is stricter than using validation

["Claus Ibsen (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAMEL-20337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17807686#comment-17807686 ] 

Claus Ibsen commented on CAMEL-20337:
-------------------------------------

Not a bug. 
predicate vs expression is not the same for some languages like simple.


> Syntax check of simple expression in filter eip is stricter than using validation 
> ----------------------------------------------------------------------------------
>
>                 Key: CAMEL-20337
>                 URL: https://issues.apache.org/jira/browse/CAMEL-20337
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 3.20.9
>            Reporter: Raymond
>            Priority: Minor
>
> I have the following Simple expression:
> {code:java}
> ${header.randomString} !='' {code}
> When I check this expression with the following code:
> {code:java}
> public ValidationErrorMessage validate(Expression expression){
>     try {
>         SimpleLanguage.simple(expression.getExpression());
>     } catch (SimpleIllegalSyntaxException e) {
>         if(expression.getName() == null) {
>             return new ValidationErrorMessage(e.getMessage());
>         }
>         return new ValidationErrorMessage("[" + expression.getName() + "]: " + e.getMessage());
>     }
>     return null;
> } {code}
> It returns OK without a syntax error.
> When I use it in the following route:
> {code:java}
>     <route id="setheader">
>         <from uri="direct:in"/>
>         <setHeader headerName="header">
>             <simple>${header.randomString} !=''</simple>
>         </setHeader>
>         <to uri="direct:out"/>
>     </route> {code}
> It also goes well.
> But when I use it in a route with a filter:
> {code:java}
>     <route id="routewithfilter">
>         <from uri="direct:in"/>
>         <filter>
>             <simple>${header.randomString} !=''</simple>
>             <to uri="direct:out"/>
>         </filter>
>     </route> {code}
> Then I get a syntax error on installation:
> {code:java}
> Failed to create route routewithfilter at: >>> Filter[simple{${header.randomString} !=''} -> [To[direct:in]]] <<< in route: Route(routewithfilter ...because of expected symbol whiteSpace but was singleQuote at location 25\n${header.randomString} !=''\n                         *\n {code}
> The error is easily solved by adding the expected whitespace:
> {code:java}
>    <simple>${header.randomString} != ''</simple> {code}
> My question is, why doesn't work everywhere the same? Is there an explanation for this or is it a bug?



--
This message was sent by Atlassian Jira
(v8.20.10#820010)