[jira] [Commented] (CONFIGURATION-599) CombinedConfiguration fails to merge correctly when one configuration only contains one property

["Martin Lindgren (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CONFIGURATION-599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14526330#comment-14526330 ] 

Martin Lindgren commented on CONFIGURATION-599:
-----------------------------------------------

Yes it could related to my problem.

We have multiple projects which depends on an internal framework which sets up common parts of project settings such as the configurations. This internal framework use the {{MergeCombiner}}. I have solved the problem by adding functionality to the framework to specify which combiner a specific project should have.

So if the {{MergeCombiner}} works as expected with the provided example this issue can be rejected. 

Thanks.

> CombinedConfiguration fails to merge correctly when one configuration only contains one property
> ------------------------------------------------------------------------------------------------
>
>                 Key: CONFIGURATION-599
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-599
>             Project: Commons Configuration
>          Issue Type: Bug
>    Affects Versions: 1.9
>            Reporter: Martin Lindgren
>            Priority: Critical
>
> When using a CombinedConfiguration it fails to merge properties located in both of the configurations if one of the configuration only contains 1 property.
> {code:title=CombinedConfiguration.java|borderStyle=solid}
> 	public static void main(String[] args)
> 	{
> 		NodeCombiner combiner = new MergeCombiner();
> 		combiner.addListNode("module");
> 		CombinedConfiguration configuration = new CombinedConfiguration(combiner);
> 		
> 		XMLConfiguration xmlConf = new XMLConfiguration();
> 		xmlConf.addProperty("modules.module", "1");
> 		xmlConf.addProperty("modules.module", "2");
> 		xmlConf.addProperty("modules.module", "3");
> 		
> 		XMLConfiguration xmlConf2 = new XMLConfiguration();
> 		xmlConf2.addProperty("modules.module", "4");
> 		configuration.addConfiguration(xmlConf);
> 		configuration.addConfiguration(xmlConf2);
> 		
> 		//THIS WILL NOT PRINT THE VALUE 4 FROM XMLCONF2
> 		for(String s : configuration.getStringArray("modules.module"))
> 		{
> 			System.out.println(s);
> 		}
> 		
> 		System.out.println();
> 		//Now add one more additional property
> 		xmlConf2.addProperty("modules.module", "5");
> 		
> 		//NOW IT WILL PRINT BOTH VALUE 4 AND 5 FROM XMLCONF2
> 		for(String s : configuration.getStringArray("modules.module"))
> 		{
> 			System.out.println(s);
> 		}
> 	}
> {code}



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