How to use

Expression$Operation

in

com.netflix.iceberg.expressions

private static com.netflix.iceberg.expressions.Expression convert(Operation op,
                                 Expression left,
                                 Expression right) {
 Pair<Transform, String> attrPair = null;
 Operation leftOperation = null;
 Literal lit = null;
 if (right instanceof Literal) {
  lit = (Literal) right;
  attrPair = convertAttr(left);
  leftOperation = op;
 } else if (left instanceof Literal) {
  lit = (Literal) left;
  attrPair = convertAttr(right);
  leftOperation = op.flipLR();
 }
 if (attrPair != null) {
  switch (attrPair.first()) {
   case IDENTITY:
    return predicate(leftOperation, attrPair.second(), valueFromSpark(lit));
   case YEAR:
    return filter(leftOperation, attrPair.second(), (int) lit.value(),
      SparkExpressions::yearToTimestampMicros);
   case DAY:
    return filter(leftOperation, attrPair.second(), (int) lit.value(),
      SparkExpressions::dayToTimestampMicros);
   default:
  }
 }
 return null;
}

 @Override
 public Expression negate() {
  return new BoundPredicate<>(op().negate(), ref(), literal());
 }
}

@Override
public Expression negate() {
 return new UnboundPredicate<>(op().negate(), ref(), literal());
}