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From "Pascal Essiembre (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CONFIGURATION-703) xml:space="preserve" does not handle blank strings properly
Date Tue, 05 Jun 2018 02:25:00 GMT

    [ https://issues.apache.org/jira/browse/CONFIGURATION-703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16501199#comment-16501199
] 

Pascal Essiembre commented on CONFIGURATION-703:
------------------------------------------------

I did a bit of research, and it seems the XML specs says {{<myElem/>}} and {{<myElem></myElem>}}
should both be treated the same: empty string.  {{null}} can be returned if the element does
not exist at all.  The one that is unclear to me is when an element has an {{xsi:nil="true"}}
attribute.  That attribute signifies an element is {{null}}.  It looks as if that special
flag is used to indicate no values when dealing with enums since technically an empty string
is not a valid value for those.

> xml:space="preserve" does not handle blank strings properly
> -----------------------------------------------------------
>
>                 Key: CONFIGURATION-703
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-703
>             Project: Commons Configuration
>          Issue Type: Bug
>    Affects Versions: 2.2
>            Reporter: Pascal Essiembre
>            Priority: Major
>
> When using XMLConfiguration 2, tags containing only white spaces are not handled properly
when xml:space="preserve" is set.  'null' is returned instead of the actual spaces.  To
reproduce:
>  
> {code:java}
> XMLConfiguration xml = new BasicConfigurationBuilder<>(
>         XMLConfiguration.class).configure(
>             new Parameters().xml()).getConfiguration();
> FileHandler fh = new FileHandler(xml);
> fh.load(new StringReader("<test xml:space=\"preserve\">    </test>"));
> System.out.println("TEST: '" + xml.getString("") + "'");
> // Outputs   -> TEST: 'null'
> // Should be -> TEST: '    '
> {code}
>  
>  
>  
>  



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