How to use

extractKeys

method

in

org.apache.flink.api.java.typeutils.runtime.NullAwareComparator

@Override
public int extractKeys(Object record, Object[] target, int index) {
  int len = comparators.length;
  int localIndex = index;
  for (int i = 0; i < len; i++) {
    Object element = ((Row) record).getField(keyPositions[i]);  // element can be null
    localIndex += comparators[i].extractKeys(element, target, localIndex);
  }
  return localIndex - index;
}

@Override
public int extractKeys(Object record, Object[] target, int index) {
  int len = comparators.length;
  int localIndex = index;
  for (int i = 0; i < len; i++) {
    Object element = ((Row) record).getField(keyPositions[i]);  // element can be null
    localIndex += comparators[i].extractKeys(element, target, localIndex);
  }
  return localIndex - index;
}

@Override
public int extractKeys(Object record, Object[] target, int index) {
  int len = comparators.length;
  int localIndex = index;
  for (int i = 0; i < len; i++) {
    Object element = ((Row) record).getField(keyPositions[i]);  // element can be null
    localIndex += comparators[i].extractKeys(element, target, localIndex);
  }
  return localIndex - index;
}

  public int extractKeys(BaseRow record, Object[] target, int index) {
    int len = nullAwareComparators.length;
    int localIndex = index;
    for (int i = 0; i < len; i++) {
      int pos = keyPositions[i];
      Object element = record.isNullAt(pos) ? null : TypeGetterSetters.get(record, pos, types[pos]);
      localIndex += nullAwareComparators[i].extractKeys(element, target, localIndex);
    }
    return localIndex - index;
  }
}