[ 
https://issues.apache.org/jira/browse/METRON-1877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16689808#comment-16689808
 ] 

ASF GitHub Bot commented on METRON-1877:
----------------------------------------

Github user justinleet commented on a diff in the pull request:

    https://github.com/apache/metron/pull/1268#discussion_r234303547
  
    --- Diff: 
metron-stellar/stellar-common/src/test/java/org/apache/metron/stellar/dsl/functions/BasicStellarTest.java
 ---
    @@ -916,6 +916,53 @@ public void testShortCircuit_conditional() throws 
Exception {
         Assert.assertEquals("foo", run("if NOT('metron' in [ 'metron', 
'metronicus'] ) then THROW('expression') else 'foo'", new HashMap<>()));
       }
     
    --- End diff --
    
    Added test cases for statement following the pattern
    ```
        // IF TO_UPPER('foo') == 'FOO'
        //   THEN IF GET_FIRST(MAP(['test_true'], x -> TO_UPPER(x))) == 
'TEST_TRUE'
        //     THEN match{ var1 < 12 => 'less', var1 >= 10 => 'more', default 
=> 'default'}
        //   ELSE 'b'
        // ELSE 'c'
    ```
    
    Does this meet what you're looking for? I'm not sure how deep you want to 
go down the rabbit hole, but this seems like it's hitting a pretty good amount 
of stuff on the inner IF (multiple functions, list syntax, lambda, ==, along 
with a match in the then.


> Nested IF ELSE statements can cause parse errors in Stellar
> -----------------------------------------------------------
>
>                 Key: METRON-1877
>                 URL: https://issues.apache.org/jira/browse/METRON-1877
>             Project: Metron
>          Issue Type: Improvement
>            Reporter: Justin Leet
>            Assignee: Justin Leet
>            Priority: Major
>
> IF ELSE statements nested inside IF ELSEstatements can cause problems with 
> short-circuiting. See the following example.
> {code:java}
> Stellar>>> IF true THEN IF false THEN true ELSE false ELSE is_alert
> false
> Stellar>>> IF true THEN IF true THEN true ELSE false ELSE is_alert
> ! Invalid parse, found null
> org.apache.metron.stellar.dsl.ParseException: Invalid parse, found null
> at 
> org.apache.metron.stellar.common.StellarCompiler$Expression.apply(StellarCompiler.java:211)
> at 
> org.apache.metron.stellar.common.BaseStellarProcessor.parse(BaseStellarProcessor.java:145)
> at 
> org.apache.metron.stellar.common.shell.DefaultStellarShellExecutor.executeStellar(DefaultStellarShellExecutor.java:401)
> at 
> org.apache.metron.stellar.common.shell.DefaultStellarShellExecutor.execute(DefaultStellarShellExecutor.java:257)
> at 
> org.apache.metron.stellar.common.shell.cli.StellarShell.execute(StellarShell.java:357)
> at org.jboss.aesh.console.AeshProcess.run(AeshProcess.java:53)
> at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:748){code}



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Reply via email to