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Gary Gregory commented on CONFIGURATION-753: -------------------------------------------- I agree that the behavior should be consistent. Feel free to provide a PR on Github ;) (with a unit test). > Handling of interpolation is inconsistent > ----------------------------------------- > > Key: CONFIGURATION-753 > URL: https://issues.apache.org/jira/browse/CONFIGURATION-753 > Project: Commons Configuration > Issue Type: Bug > Components: Interpolation > Affects Versions: 2.5 > Environment: Java 8, Configurations2 2.5 > Reporter: Peter > Priority: Major > Attachments: test.properties > > > If a key is repeated in a configuration and then used in an interpolation > elsewhere, the behaviour is inconsistent. There are other tickets/discussions > about whether it should just pick the first value or not, but I don't think > it should do both. > {code:java|title=/tmp/test.properties} > abc = hello > abc = world > foo.one = ${abc} > foo.two = prefix ${abc} suffix > {code} > {code:java|title=Demo.java (main)} > Parameters params = new Parameters(); > FileBasedConfigurationBuilder<FileBasedConfiguration> builder = new > FileBasedConfigurationBuilder<FileBasedConfiguration>(PropertiesConfiguration.class) > .configure(params.fileBased() > .setFileName("/tmp/test.properties") > ); > try { > FileBasedConfiguration config = builder.getConfiguration(); > System.out.println(config.getString("foo.one")); > System.out.println(config.getString("foo.two")); > } catch (ConfigurationException cex) { > // pass > } > {code} > The output from the above is > {noformat} > hello > prefix [hello, world] suffix > {noformat} > In the first case, only the first value is being matched, in the second both > values (and [, ]) are used. > I'd expect the output to either be > {noformat:title=First value only} > hello > prefix hello suffix > {noformat} > or > {noformat:title=Both values used} > [hello, world] > prefix [hello, world] suffix > {noformat} > I can work around whichever style is chosen but think it'd be much more > intuitive if both cases were handled the same. -- This message was sent by Atlassian JIRA (v7.6.14#76016)