/** {@inheritDoc} */
@Override
public VType next() throws Exception {
if (index < 0) throw new Exception("End of samples"); // $NON-NLS-1$
// Remember value, prepare the next value
final VType result = value;
samples.getLock().lock();
try {
++index;
if (index >= samples.size()) index = -1; // No more samples
else {
value = samples.get(index).getVType();
if (VTypeHelper.getTimestamp(value).compareTo(end) > 0) index = -1; // Beyond end time
}
} finally {
samples.getLock().unlock();
}
return result;
}
/**
* Initialize
*
* @param item Item from which to get samples /** @param start Start time /** @param end End time
*/
public ModelSampleIterator(final ModelItem item, final Instant start, final Instant end) {
this.samples = item.getSamples();
this.end = end;
samples.getLock().lock();
try {
// Anything?
if (samples.size() <= 0) index = -1;
// All data after start time?
else if (samples.get(0).getPosition().compareTo(start) >= 0) index = 0;
else { // There is data before the start time. Find sample just before start time.
index = findSampleLessOrEqual(start);
}
// Is first sample already after end time?
if (index >= 0) {
final PlotSample sample = samples.get(index);
value = sample.getVType();
if (sample.getPosition().compareTo(end) > 0) index = -1;
}
} finally {
samples.getLock().unlock();
}
}