| package edu.uci.ics.asterix.om.typecomputer.impl; |
| |
| import edu.uci.ics.asterix.om.types.AUnionType; |
| import edu.uci.ics.asterix.om.types.BuiltinType; |
| import edu.uci.ics.asterix.om.types.IAType; |
| import edu.uci.ics.asterix.om.types.TypeHelper; |
| |
| /** |
| * |
| * @author Xiaoyu Ma |
| */ |
| public class TripleStringStringOrNullTypeComputer extends AbstractTripleStringTypeComputer { |
| public static final TripleStringStringOrNullTypeComputer INSTANCE = new TripleStringStringOrNullTypeComputer(); |
| private TripleStringStringOrNullTypeComputer() {} |
| |
| @Override |
| public IAType getResultType(IAType t0, IAType t1, IAType t2) { |
| if (TypeHelper.canBeNull(t0) || TypeHelper.canBeNull(t1) || TypeHelper.canBeNull(t2)) { |
| return AUnionType.createNullableType(BuiltinType.ASTRING); |
| } |
| return BuiltinType.ASTRING; |
| } |
| } |