public static Config getConfigForKey(Config config, String... keys) {
// generate all the keys from least specific to most specific
// foo, bar baz -> foo, foo.bar, foo.bar.baz
Config mergedConfig = config;
List<String> strings = Arrays.asList(keys);
List<String> resolvedKeys =
IntStream.rangeClosed(1, keys.length)
.boxed()
.map(i -> Joiner.on(".").join(strings.subList(0, i)))
.collect(Collectors.toList());
resolvedKeys = Lists.reverse(resolvedKeys);
for (String key : resolvedKeys) {
Config fromKey = config.getConfig(key);
mergedConfig = mergedConfig.withFallback(fromKey);
}
return mergedConfig;
}
