gistfile1.java

 public static List<MultiDataPoint> convertValueResults(DruidValueResult[] results)
    {
        Map<DateTime, List<DruidValueResult>> timeStampToResults = Arrays.stream(results)
                .collect(groupingBy(r -> DateTime.parse(r.timestamp)));


        List<MultiDataPoint> multiDataPoints = timeStampToResults.entrySet()
                .stream()
                .map(e -> new MultiDataPoint(e.getKey(), e.getValue().stream()
                        .collect(toMap(r -> r.event.name, r -> r.event.value))))
                .collect(toList());


        Collections.sort(multiDataPoints, (o1, o2) -> o1.getTimestamp().compareTo(o2.getTimestamp()));
        return multiDataPoints;
    }