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https://issues.apache.org/jira/browse/CONFIGURATION-848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17862431#comment-17862431
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Gary D. Gregory commented on CONFIGURATION-848:
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[~laszlohujber]
Hm. I'm not sure your "White Night" delimiter example can work as the code is
now. The JSON config expects the delimiter to be ".". More refactoring would be
needed. Feel free to propose a PR and more examples in it as tests.
> SubsetConfiguration does not account for delimiters as it did in 2.9.0
> ----------------------------------------------------------------------
>
> Key: CONFIGURATION-848
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-848
> Project: Commons Configuration
> Issue Type: Bug
> Affects Versions: 2.10.0, 2.10.1, 2.11.0
> Reporter: Laszlo Hujber
> Assignee: Gary D. Gregory
> Priority: Major
>
> A bug occurs when using {{SubsetConfiguration}} with concrete subclasses of
> {{{}AbstractHierarchicalConfiguration{}}}. This issue likely happens because
> {{AbstractHierarchicalConfiguration}} does not override:
> {code:java}
> protected Iterator<String> getKeysInternal(String prefix, String delimiter) {
> }
> {code}
> The relevant pull request that introduced this bug is
> [#300|https://github.com/apache/commons-configuration/pull/300].
> Refer to the test case that passes in version 2.9.
> {code:java}
> @Test
> public void testSubsetWithJSONConfiguration() throws
> FileNotFoundException, ConfigurationException {
> final JSONConfiguration jsonConfiguration = new JSONConfiguration();
> jsonConfiguration.read(new
> FileReader(ConfigurationAssert.getTestFile("test.json").getAbsolutePath()));
> final SubsetConfiguration subset = new
> SubsetConfiguration(jsonConfiguration, "capitals(0)", ".");
> assertFalse(subset.isEmpty());
> assertEquals(2, subset.size());
> assertEquals("USA", subset.getString("country"));
> }
> {code}
> Actual Behavior:
> * {{isEmpty()}} returns {{{}true{}}}.
> * {{size()}} returns {{{}0{}}}.
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