Peter created CONFIGURATION-753: ----------------------------------- Summary: Handling of interpolation is inconsistant 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 Attachments: test.properties
If a key is repeated in a configuration and then used in an interpolation else where, 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:title=/tmp/test.properties} abc = hello abc = world foo.one = ${abc} foo.two = prefix ${abc} suffix {code} {code: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)