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https://issues.apache.org/jira/browse/CONFIGURATION-684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16302945#comment-16302945
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Oliver Heger commented on CONFIGURATION-684:
--------------------------------------------
[~kinow], there is nothing special in the handling of escapes for YAML
configuration. The logic is implemented in the base classes for hierarchical
configurations. If you modify the test program from [~fabienrenaud] to use a
different configuration type - say {{XMLConfiguration}} -, it should produce
similar results.
It is possible to handle keys with dots in their names; they just have to be
escaped properly as described in the user's guide.
Also note that the dot is critical only for the default expression engine
because here it is the default element delimiter character. You can configure a
different character or switch to {{XPathExpressionEngine}}; then you do not
have to do the escaping any more.
> YAMLConfiguration keys with double dots
> ---------------------------------------
>
> Key: CONFIGURATION-684
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-684
> Project: Commons Configuration
> Issue Type: Bug
> Reporter: Fabien Renaud
> Labels: discussion, help-wanted
>
> h2. Issue
> Loading a YAML configuration with dotted keys causes dots to be duplicated in
> the keys of the YAMLConfiguration object.
> h2. Repro
> 100% repro:
> file.yml:
> {code}some.key.with.dots: 123{code}
> {code}
> package foo;
> import org.apache.commons.configuration2.YAMLConfiguration;
> import
> org.apache.commons.configuration2.builder.FileBasedConfigurationBuilder;
> import org.apache.commons.configuration2.builder.fluent.Parameters;
> import org.apache.commons.configuration2.ex.ConfigurationException;
> public class App {
> public static void main(String[] args) throws ConfigurationException {
> Parameters params = new Parameters();
> FileBasedConfigurationBuilder<YAMLConfiguration> builder1 =
> new FileBasedConfigurationBuilder<>(YAMLConfiguration.class)
>
> .configure(params.fileBased().setFileName("file.yml"));
>
> YAMLConfiguration conf = builder1.getConfiguration();
> conf.getKeys().forEachRemaining(System.out::println);
> System.out.println("---");
> YAMLConfiguration yaml = new YAMLConfiguration();
> yaml.read(new
> InputStreamReader(ClassLoader.getSystemResourceAsStream("file.yml")));
> yaml.getKeys().forEachRemaining(System.out::println);
> }
> }
> {code}
> prints
> {code}some..key..with..dots
> ---
> some..key..with..dots
> {code}
> That is a serious bug for a configuration system. The issue may easily go
> untested for some keys and only reveal itself on production.
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