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https://issues.apache.org/jira/browse/CONFIGURATION-342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12642786#action_12642786
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Oliver Heger commented on CONFIGURATION-342:
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Yes, I am interested in this stuff and am happy to review and apply patches.
I think, adding support for multi-valued properties should not be too
complicated. But making DatabaseConfiguration truly hierarchical will be
challenging; we would have to implement all the enhanced query facilities.
To your question about traversing hierarchical node structures: There is indeed
a visitor-like approach implemented in the nodes of a hierarchical
configuration. You can for instance check out the
HierarchicalConfiguration.getKeys() method, which uses a visitor to gather a
list of the existing keys. This should be similar to what is needed for
DatabaseConfiguration.
> 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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