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From "Ning Zhang (Jira)" <j...@apache.org>
Subject [jira] [Commented] (CONFIGURATION-764) Default date lookup can not work for some specific format
Date Fri, 11 Oct 2019 04:21:00 GMT

    [ https://issues.apache.org/jira/browse/CONFIGURATION-764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949121#comment-16949121
] 

Ning Zhang commented on CONFIGURATION-764:
------------------------------------------

Or change the logic in _looksLikeSingleVariable_. But that will need to change this method
name.

> Default date lookup can not work for some specific format
> ---------------------------------------------------------
>
>                 Key: CONFIGURATION-764
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-764
>             Project: Commons Configuration
>          Issue Type: Bug
>          Components: Interpolation
>    Affects Versions: 2.6
>         Environment: Java 1.8.0_144,
> Windows 10/Linux
>            Reporter: Ning Zhang
>            Priority: Major
>         Attachments: 0001-Fix-default-date-lookup-issue.patch
>
>
> When default date lookup is like: *${date:yyyyMM}/${date:ddHHmmss}*
> It will encounter one exception like:
> _java.lang.IllegalArgumentException: Illegal pattern character 't'_
> But if change date lookup format to : /*${date:yyyyMM}/${date:ddHHmmss}*
> There will be not such issue anymore.
> After investigation, found it is caused by _interpolate_ method in _ConfigurationInterpolator.java_.
> For the input date lookup format, it is will be taken as single variable via _looksLikeSingleVariable_,
> so default date lookup will try to format the date directly then throw one exception.
> Attached patch is trying to catch the exception then return null, substitutor will continue
to work.
>  



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