Config value class that parses a comma-separated set

gistfile1.java

    public static final class StringSet extends ForwardingSet<String>
    {
        private final Set<String> delegate;

        private StringSet(Set<String> delegate)
        {
            this.delegate = ImmutableSet.copyOf(delegate);
        }

        public static StringSet of(String... strings)
        {
            return new StringSet(ImmutableSet.copyOf(strings));
        }

        public static StringSet valueOf(String string)
        {
            return of(string.split("\\s*,\\s*"));
        }

        @Override
        protected Set<String> delegate()
        {
            return delegate;
        }
    }