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https://issues.apache.org/jira/browse/CONFIGURATION-540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oliver Heger resolved CONFIGURATION-540.
----------------------------------------
Resolution: Fixed
Fix Version/s: 2.0
{{MapConfiguration}} now directly uses the passed in {{Properties}} object as
its data store. Thus, changes on a property done by {{SystemConfiguration}}
directly affect the corresponding system properties.
Fixed in subversion in revision 1467644. Thanks for the report.
> SystemConfiguration copies System.getProperties() instead of directly using
> it since 1.8
> ----------------------------------------------------------------------------------------
>
> Key: CONFIGURATION-540
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-540
> Project: Commons Configuration
> Issue Type: Bug
> Affects Versions: 1.8, 1.9
> Reporter: subes
> Priority: Critical
> Fix For: 2.0
>
>
> In commons-configuration-1.7 the SystemConfiguration directly used the Map of
> System.getProperties(). Thus when changing the properties inside the
> SystemConfiguration, the changes were visible in the Map of
> System.getProperties().
> Since commons-configuration-1.8 the SystemConfiguration creates a new Map as
> a copy of System.getProperties() and thus changes in the SystemConfiguration
> Map are not visible in the System.getProperties() Map.
> In 1.7 this super constructor is used by SystemProperties:
> {code}
> public MapConfiguration(Map map) {
> this.map = map;
> }
> {code}
> In 1.9 this super constructor is used by SystemProperties:
> {code}
> public MapConfiguration(Properties props) {
> map = convertPropertiesToMap(props);
> }
> {code}
> A fix could look like this:
> {code}
> public SystemConfiguration() {
> super((Map)System.getProperties());
> }
> {code}
> This breaks the functionality I expected to be able to use
> SystemConfiguration as a replacement API for accessing and manipulating
> SystemProperties. For me this is a regression.
> My workaround is currently not to use:
> {code}
> new SystemConfiguration();
> {code}
> but instead use:
> {code}
> new MapConfiguration((Map) System.getProperties());
> {code}
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