private ATypeTag getTargetTypeTag(ATypeTag expectedTypeTag, IAType aObjectType)
throws IOException {
if (aObjectType == null) {
return expectedTypeTag;
}
if (aObjectType.getTypeTag() != ATypeTag.UNION) {
final ATypeTag typeTag = aObjectType.getTypeTag();
if (ATypeHierarchy.canPromote(expectedTypeTag, typeTag)
|| ATypeHierarchy.canDemote(expectedTypeTag, typeTag)) {
return typeTag;
} else {
return null;
}
// return ATypeHierarchy.canPromote(expectedTypeTag, typeTag) ? typeTag : null;
} else { // union
List<IAType> unionList = ((AUnionType) aObjectType).getUnionList();
for (IAType t : unionList) {
final ATypeTag typeTag = t.getTypeTag();
if (ATypeHierarchy.canPromote(expectedTypeTag, typeTag)
|| ATypeHierarchy.canDemote(expectedTypeTag, typeTag)) {
return typeTag;
}
}
}
return null;
}
private void parseAndCastNumeric(ATypeTag typeTag, IAType objectType, DataOutput out)
throws AsterixException, IOException {
final ATypeTag targetTypeTag = getTargetTypeTag(typeTag, objectType);
DataOutput dataOutput = out;
if (targetTypeTag != typeTag) {
castBuffer.reset();
dataOutput = castBuffer.getDataOutput();
}
if (targetTypeTag == null || !parseValue(admLexer.getLastTokenImage(), typeTag, dataOutput)) {
throw new ParseException(
mismatchErrorMessage + objectType.getTypeName() + mismatchErrorMessage2 + typeTag);
}
// If two type tags are not the same, either we try to promote or demote source type to the
// target type
if (targetTypeTag != typeTag) {
if (ATypeHierarchy.canPromote(typeTag, targetTypeTag)) {
// can promote typeTag to targetTypeTag
ITypeConvertComputer promoteComputer =
ATypeHierarchy.getTypePromoteComputer(typeTag, targetTypeTag);
if (promoteComputer == null) {
throw new AsterixException(
"Can't cast the " + typeTag + " type to the " + targetTypeTag + " type.");
}
// do the promotion; note that the type tag field should be skipped
promoteComputer.convertType(
castBuffer.getByteArray(),
castBuffer.getStartOffset() + 1,
castBuffer.getLength() - 1,
out);
} else if (ATypeHierarchy.canDemote(typeTag, targetTypeTag)) {
// can demote source type to the target type
ITypeConvertComputer demoteComputer =
ATypeHierarchy.getTypeDemoteComputer(typeTag, targetTypeTag);
if (demoteComputer == null) {
throw new AsterixException(
"Can't cast the " + typeTag + " type to the " + targetTypeTag + " type.");
}
// do the demotion; note that the type tag field should be skipped
demoteComputer.convertType(
castBuffer.getByteArray(),
castBuffer.getStartOffset() + 1,
castBuffer.getLength() - 1,
out);
}
}
}