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https://issues.apache.org/jira/browse/CONFIGURATION-401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12776026#action_12776026
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Oliver Heger commented on CONFIGURATION-401:
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In your special example the {{PropertiesConfiguration}} contains 3 keys:
_persons.person.name_, _persons.person.surName_, and _persons.person.phoneNum_.
Each key is associated with a list of values. In this concrete case it is
possible to convert this data into a hierarchical structure.
But as soon as the structure becomes slightly more complex, you are lost.
Consider the example where persons are organized in groups, and you have
properties like
{code}
persons.group.name=admins
persons.person.name=x
persons.person.name=y
persons.group.name=users
persons.person.name=z
{code}
Here you have two groups and three persons, but after the properties are read
into a {{PropertiesConfiguration}} how do you know which persons belong to
which group?
You try to extract structure from a format that is simply not provided.
> HierarchicalConfiguration does not support hierarchy from property files
> -------------------------------------------------------------------------
>
> Key: CONFIGURATION-401
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-401
> Project: Commons Configuration
> Issue Type: Bug
> Components: Expression engine
> Affects Versions: 1.6
> Environment: windows/Linux
> Reporter: yair ogen
>
> If you have hierarchy like this:
> persons.person.name=1
> persons.person.surName=2
> persons.person.phoneNum=3
> persons.person.name=4
> persons.person.surName=5
> persons.person.phoneNum=6
> persons.person.name=7
> persons.person.surName=8
> persons.person.phoneNum=9
> If I have a regular property configuration that loaded a file containing in
> the above. then I transform into HierarchicalConfiguration using:
> ConfigurationUtils.convertToHierarchical(configuration).
> The tree is not right.
> I can do this:
> hierarchicalConfiguration.subset("persons").subset("person(0)").getKeys()
> but this returned empty iterator:
> hierarchicalConfiguration.subset("persons").subset("person(1)").getKeys()
> Only the first person is available.
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