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https://issues.apache.org/jira/browse/CONFIGURATION-342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12642624#action_12642624
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Oliver Heger commented on CONFIGURATION-342:
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This looks interesting. For DatabaseConfiguration to be useful on its own such
a feature has to be integrated into this class. E.g. when adding a new property
the flattening has to be performed executing multiple inserts if necessary.
(BTW I am not sure whether flatten()/unflatten() is the right naming because it
can be confused with transforming a hierarchical configuration into a flat one
and vice versa.)
Making DatabaseConfiguration a true hierarchical configuration will even be
more complex. I assume this was not intended when the class was created, and I
would already be happy if we get support for multiple properties right.
> DatabaseConfiguration.copy() loses list/array values
> ----------------------------------------------------
>
> Key: CONFIGURATION-342
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-342
> Project: Commons Configuration
> Issue Type: Bug
> Components: Type conversion
> Affects Versions: 1.5
> Reporter: Scott Wells
> Attachments: ConfigurationUtil.java
>
>
> I've found a bug where adding a list property to a BaseConfiguration, then
> copying that full BaseConfiguration to a DatabaseConfiguration, the list is
> lost and only the first element is copied to the destination
> DatabaseConfiguration. For example:
> BaseConfiguration bc = new BaseConfiguration();
> bc.addProperty("myList", Arrays.asList("1", "2", "3", "4");
> DatabaseConfiguration dc = new DatabaseConfiguration(...);
> dc.copy(bc);
> List list = dc.getList("myList");
> // At this point, you'll get a single element list containing only "1"
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