@Override
public void hashRow(DimensionSelector dimSelector, Hasher hasher) {
final IndexedInts row = dimSelector.getRow();
final int size = row.size();
// nothing to add to hasher if size == 0, only handle size == 1 and size != 0 cases.
if (size == 1) {
final String value = dimSelector.lookupName(row.get(0));
hasher.putUnencodedChars(nullToSpecial(value));
} else if (size != 0) {
final String[] values = new String[size];
for (int i = 0; i < size; ++i) {
final String value = dimSelector.lookupName(row.get(i));
values[i] = nullToSpecial(value);
}
// Values need to be sorted to ensure consistent multi-value ordering across different
// segments
Arrays.sort(values);
for (int i = 0; i < size; ++i) {
if (i != 0) {
hasher.putChar(CARDINALITY_AGG_SEPARATOR);
}
hasher.putUnencodedChars(values[i]);
}
}
}
@Test
public void testResetSanity() throws IOException {
IncrementalIndex index = indexCreator.createIndex();
DateTime t = DateTime.now();
Interval interval = new Interval(t.minusMinutes(1), t.plusMinutes(1));
index.add(
new MapBasedInputRow(
t.minus(1).getMillis(),
Lists.newArrayList("billy"),
ImmutableMap.<String, Object>of("billy", "hi")));
index.add(
new MapBasedInputRow(
t.minus(1).getMillis(),
Lists.newArrayList("sally"),
ImmutableMap.<String, Object>of("sally", "bo")));
IncrementalIndexStorageAdapter adapter = new IncrementalIndexStorageAdapter(index);
for (boolean descending : Arrays.asList(false, true)) {
Sequence<Cursor> cursorSequence =
adapter.makeCursors(
new SelectorFilter("sally", "bo"), interval, QueryGranularity.NONE, descending);
Cursor cursor =
Sequences.toList(Sequences.limit(cursorSequence, 1), Lists.<Cursor>newArrayList()).get(0);
DimensionSelector dimSelector;
dimSelector = cursor.makeDimensionSelector(new DefaultDimensionSpec("sally", "sally"));
Assert.assertEquals("bo", dimSelector.lookupName(dimSelector.getRow().get(0)));
index.add(
new MapBasedInputRow(
t.minus(1).getMillis(),
Lists.newArrayList("sally"),
ImmutableMap.<String, Object>of("sally", "ah")));
// Cursor reset should not be affected by out of order values
cursor.reset();
dimSelector = cursor.makeDimensionSelector(new DefaultDimensionSpec("sally", "sally"));
Assert.assertEquals("bo", dimSelector.lookupName(dimSelector.getRow().get(0)));
}
}
@Override
public void hashValues(DimensionSelector dimSelector, HyperLogLogCollector collector) {
for (IntIterator rowIt = dimSelector.getRow().iterator(); rowIt.hasNext(); ) {
int index = rowIt.nextInt();
final String value = dimSelector.lookupName(index);
collector.add(
CardinalityAggregator.hashFn.hashUnencodedChars(nullToSpecial(value)).asBytes());
}
}