/**
* Marks all values since the last set as empty. The last set value is obtained from underlying
* offsets vector.
*
* @param lastIndex the last index (inclusive) in the offsets vector until which empty population
* takes place
* @throws java.lang.IndexOutOfBoundsException if lastIndex is negative or greater than offsets
* capacity.
*/
public void populate(int lastIndex) {
if (lastIndex < 0) {
throw new IndexOutOfBoundsException("index cannot be negative");
}
final UInt4Vector.Accessor accessor = offsets.getAccessor();
final UInt4Vector.Mutator mutator = offsets.getMutator();
final int lastSet = Math.max(accessor.getValueCount() - 1, 0);
final int previousEnd = accessor.get(lastSet); // 0 ? 0 : accessor.get(lastSet);
for (int i = lastSet; i < lastIndex; i++) {
mutator.setSafe(i + 1, previousEnd);
}
mutator.setValueCount(lastIndex + 1);
}
@Test
public void testFixedType() {
final MaterializedField field = MaterializedField.create(EMPTY_SCHEMA_PATH, UInt4Holder.TYPE);
// Create a new value vector for 1024 integers.
try (final UInt4Vector vector = new UInt4Vector(field, allocator)) {
final UInt4Vector.Mutator m = vector.getMutator();
vector.allocateNew(1024);
// Put and set a few values
m.setSafe(0, 100);
m.setSafe(1, 101);
m.setSafe(100, 102);
m.setSafe(1022, 103);
m.setSafe(1023, 104);
final UInt4Vector.Accessor accessor = vector.getAccessor();
assertEquals(100, accessor.get(0));
assertEquals(101, accessor.get(1));
assertEquals(102, accessor.get(100));
assertEquals(103, accessor.get(1022));
assertEquals(104, accessor.get(1023));
}
}