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https://issues.apache.org/jira/browse/CONFIGURATION-358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12661862#action_12661862
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Oliver Heger commented on CONFIGURATION-358:
--------------------------------------------
I think, what you observe here is standard behavior of hierarchical
configurations:
* The dot character in {{property.1}} has a special meaning as property
delimiter for the expression engine used per default by
{{HierarchicalINIConfiguration}}, so it is automatically escaped by duplicating
it. This is explained in the [User
Guide|http://commons.apache.org/configuration/userguide/howto_xml.html#Escaping_dot_characters_in_XML_tags].
If you do not want to use escaping, you can set an {{ExpressionEngine}} that
is configured to use a different property delimiter. An example of how to do
this can be found
[here|http://commons.apache.org/configuration/userguide/howto_xml.html#The_default_expression_engine].
* The {{subset()}} method does not what you want when you need to access the
global section. Invoking {{subset(null)}} returns a configuration that contains
all properties below the key *null*, which denotes the root node - i.e. all
properties of the original configuration. Use the {{getSection()}} method
instead. {{getSection(null)}} should return only the properties of the global
section and no more.
These are subtle differences between {{INIConfiguration}} and
{{HierarchicalINIConfiguration}} caused by the fact that the latter is derived
from {{HierarchicalConfiguration}}. But I don't think these are bugs. Maybe
some hints in the documentation could be added?
> subset returned from HierarchicalINIConfiguration has unexpected property
> names
> -------------------------------------------------------------------------------
>
> Key: CONFIGURATION-358
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-358
> Project: Commons Configuration
> Issue Type: Bug
> Components: Documentation, Format
> Affects Versions: 1.6
> Reporter: Charles Honton
> Fix For: 1.6
>
> Attachments: TestHierarchicalINIConfiguration.java
>
>
> With the following ini file
> # comment
> property.1 = g1
> property.2 : g2
> [section]
> property.1 = l1
> HierarchicalINIConfiguration properly creates two sections: null and
> "section". However, the subsets from this configuration do not have the
> expected property names.
> The global subset contains the following name=value pairs:
> property..1=g1
> property..2=g2
> section.property..1=l1
> The "section" subset contains the following name=value pairs:
> property..1=g1
> I expected the global subset to contain:
> property.1=g1
> property.2=g2
> I expected the "section" subset to contain:
> property.1 = l1
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