public void update(final VType value) {
display_info = Optional.ofNullable(ValueUtil.displayOf(value));
if (display_info.isPresent()) value_dbl = ValueUtil.numericValueOf(value).doubleValue();
if (value instanceof VNumber)
value_str = Double.toString(((VNumber) value).getValue().doubleValue());
else if (value instanceof VEnum) {
final VEnum ev = (VEnum) value;
if (ev.getIndex() >= 0 && ev.getIndex() < ev.getLabels().size())
value_str = ev.getLabels().get(ev.getIndex());
else value_str = Integer.toString(ev.getIndex());
} else if (value instanceof VString) value_str = ((VString) value).getValue();
else value_str = Objects.toString(value);
final Time vtime = ValueUtil.timeOf(value);
if (vtime == null) return;
final Timestamp stamp = vtime.getTimestamp();
final Instant new_time = Instant.ofEpochSecond(stamp.getSec(), stamp.getNanoSec());
if (time != null) {
final Duration duration = Duration.between(time, new_time);
final double period = duration.getSeconds() + duration.getNano() * 1e-9;
value_period.add(period);
} else value_period.reset();
time = new_time;
}
private static void appendTime(StringBuilder builder, Time time) {
builder.append(", ").append(timeFormat.format(time.getTimestamp()));
}