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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ARTEMIS-1890) # any-word wildcard doesn't match zero words if not used at the end of a wildcard expression
Date Sat, 26 May 2018 22:04:00 GMT

    [ https://issues.apache.org/jira/browse/ARTEMIS-1890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16491838#comment-16491838
] 

ASF GitHub Bot commented on ARTEMIS-1890:
-----------------------------------------

Github user jostbg commented on the issue:

    https://github.com/apache/activemq-artemis/pull/2113
  
    @michaelandrepearce The documentation states that a # matches zero or more words. It doesn't
say anything about different behavior of # depending on its location in the expression. The
current implementation however does not behave according the documentation, so either the
documentation is wrong or the implementation has a bug. I argue that it is a bug and I doubt
any user actually expects that # in the middle of an expression behaves like a one-or-more-words
wildcard. Esp. after reading the docs. This is a very surprising behavior. 
    
    While I agree that having regular expressions would be nice. It should be an optional
matching style as this can impact performance.


> # any-word wildcard doesn't match zero words if not used at the end of a wildcard expression
> --------------------------------------------------------------------------------------------
>
>                 Key: ARTEMIS-1890
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-1890
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 2.6.0
>            Reporter: Johan Stenberg
>            Priority: Major
>         Attachments: Artemis1890_AnyWordWildCard_Test.java
>
>
> [https://activemq.apache.org/artemis/docs/latest/wildcard-syntax.html] states that the
{{#}} wildcard character means _"match any sequence of *zero* or more words"_. This however
is only true if the wild card is the last character in a wildcard expression. If any word
comes after the wildcard character then the actual behavior is _"match any sequence of *one*
or more words"_
> This means, the pattern {{topics.#.FOO}} matches {{topics.abc.FOO}} but not {{topics.FOO}}
> I am attaching a test case.



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