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

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

Martin Lindgren created CONFIGURATION-599:
---------------------------------------------

             Summary: 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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