log.info("Dimension[%s] had cardinality 0, equivalent to no column, so skipping.", dimension);
skippedDimensions.add(dimension);
continue;
}
VSizeIndexedInts singleValCol = null;
VSizeIndexed multiValCol = VSizeIndexed.readFromByteBuffer(dimBuffer.asReadOnlyBuffer());
GenericIndexed<ImmutableBitmap> bitmaps = bitmapIndexes.get(dimension);
ImmutableRTree spatialIndex = spatialIndexes.get(dimension);
final BitmapFactory bitmapFactory = bitmapSerdeFactory.getBitmapFactory();
boolean onlyOneValue = true;
MutableBitmap nullsSet = null;
for (int i = 0; i < multiValCol.size(); ++i) {
VSizeIndexedInts rowValue = multiValCol.get(i);
if (!onlyOneValue) {
break;
}
if (rowValue.size() > 1) {
onlyOneValue = false;
}
if (rowValue.size() == 0) {
if (nullsSet == null) {
nullsSet = bitmapFactory.makeEmptyMutableBitmap();
}
nullsSet.add(i);
}
}
if (onlyOneValue) {
log.info("Dimension[%s] is single value, converting...", dimension);
final boolean bumpedDictionary;
if (nullsSet != null) {
log.info("Dimension[%s] has null rows.", dimension);
final ImmutableBitmap theNullSet = bitmapFactory.makeImmutableBitmap(nullsSet);
if (dictionary.get(0) != null) {
log.info("Dimension[%s] has no null value in the dictionary, expanding...", dimension);
bumpedDictionary = true;
final List<String> nullList = Lists.newArrayList();
nullList.add(null);
dictionary = GenericIndexed.fromIterable(
Iterables.concat(nullList, dictionary),
GenericIndexed.stringStrategy
);
bitmaps = GenericIndexed.fromIterable(
Iterables.concat(Arrays.asList(theNullSet), bitmaps),
bitmapSerdeFactory.getObjectStrategy()
);
} else {
bumpedDictionary = false;
bitmaps = GenericIndexed.fromIterable(
Iterables.concat(
Arrays.asList(
bitmapFactory
.union(Arrays.asList(theNullSet, bitmaps.get(0)))
),
Iterables.skip(bitmaps, 1)
),
bitmapSerdeFactory.getObjectStrategy()
);
}
} else {
bumpedDictionary = false;
}
final VSizeIndexed finalMultiValCol = multiValCol;
singleValCol = VSizeIndexedInts.fromList(
new AbstractList<Integer>()
{
@Override
public Integer get(int index)
{
final VSizeIndexedInts ints = finalMultiValCol.get(index);
return ints.size() == 0 ? 0 : ints.get(0) + (bumpedDictionary ? 1 : 0);
}
@Override
public int size()
{