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From "Oliver Heger (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CONFIGURATION-613) MapConfiguration cannot handle property set to single \t or \n
Date Wed, 07 Oct 2015 19:35:26 GMT

    [ https://issues.apache.org/jira/browse/CONFIGURATION-613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14947443#comment-14947443
] 

Oliver Heger commented on CONFIGURATION-613:
--------------------------------------------

Can you please have a look at the most recent code in subversion? There have already some
changes been applied to {{MapConfiguration}}. Especially, the class now uses the inherited
_list delimiter handler_ for splitting, and here a flag can be passed in whether trimming
is enabled or not.

> MapConfiguration cannot handle property set to single \t or \n
> --------------------------------------------------------------
>
>                 Key: CONFIGURATION-613
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-613
>             Project: Commons Configuration
>          Issue Type: Bug
>            Reporter: Maarten Boekhold
>
> See the following test, written in groovy (2.4.4). Open a groovyConsole, copy/paste in
this code and hit ctrl-Enter to run. You need a working internet connection.
> {code}
> @Grab(group='commons-configuration', module='commons-configuration', version='1.9')
> import org.apache.commons.configuration.MapConfiguration
> import org.apache.commons.configuration.PropertiesConfiguration
> // groovy dollar-slashy-string syntax, ignores backslash
> // as an escape character so \t remains a literal string
> // backslash + t
> def propsString = $/
> prefix.field1=\t
> prefix.field2=a\tb
> /$
> // Java properties work
> Properties props = new Properties()
> props.load(new StringReader(propsString))
> // OK
> assert props.getProperty('prefix.field1') == '\t'
> // OK
> assert props.getProperty('prefix.field2') == 'a\tb'
> // PropertiesConfiguration works
> PropertiesConfiguration propscfg = new PropertiesConfiguration()
> propscfg.load(new StringReader(propsString))
> // OK
> assert propscfg.getString('prefix.field1') == '\t'
> // OK
> assert propscfg.getProperty('prefix.field2') == 'a\tb'
> // MapConfiguration does not work
> MapConfiguration mapcfg = new MapConfiguration(props)
> // OK
> assert mapcfg.getProperty('prefix.field2') == 'a\tb'
> // FAIL
> // MapConfiguration loses the single tab character
> assert mapcfg.getString('prefix.field1') == '\t'
> {code}
> Output is:
> {noformat}
> Exception thrown
> Assertion failed: 
> assert mapcfg.getString('prefix.field1') == '\t'
>        |      |                          |
>        |      ""                         false
>        org.apache.commons.configuration.MapConfiguration@1cd4064c
> 	at ConsoleScript13.run(ConsoleScript13:35)
> {noformat}
> As you can see, once we've 'converted' the java.util.Properties instance to a MapConfiguration,
the single \t character is lost. *Embedded* tab characters however are retained!



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