public static Datum cast(Datum operandDatum, DataType target, @Nullable TimeZone tz) {
switch (target.getType()) {
case BOOLEAN:
return DatumFactory.createBool(operandDatum.asBool());
case CHAR:
return DatumFactory.createChar(operandDatum.asChar());
case INT1:
case INT2:
return DatumFactory.createInt2(operandDatum.asInt2());
case INT4:
return DatumFactory.createInt4(operandDatum.asInt4());
case INT8:
return DatumFactory.createInt8(operandDatum.asInt8());
case FLOAT4:
return DatumFactory.createFloat4(operandDatum.asFloat4());
case FLOAT8:
return DatumFactory.createFloat8(operandDatum.asFloat8());
case VARCHAR:
case TEXT:
switch (operandDatum.type()) {
case TIMESTAMP:
{
TimestampDatum timestampDatum = (TimestampDatum) operandDatum;
if (tz != null) {
return DatumFactory.createText(
TimestampDatum.asChars(operandDatum.asTimeMeta(), tz, false));
} else {
return DatumFactory.createText(timestampDatum.asChars());
}
}
default:
return DatumFactory.createText(operandDatum.asTextBytes());
}
case DATE:
return DatumFactory.createDate(operandDatum);
case TIME:
return DatumFactory.createTime(operandDatum);
case TIMESTAMP:
return DatumFactory.createTimestamp(operandDatum, tz);
case BLOB:
return DatumFactory.createBlob(operandDatum.asByteArray());
case INET4:
return DatumFactory.createInet4(operandDatum.asByteArray());
case ANY:
return DatumFactory.createAny(operandDatum);
default:
throw new TajoRuntimeException(
new InvalidValueForCastException(operandDatum.type(), target.getType()));
}
}
public Datum toDatum(int i) {
if (keys[i] == null) {
return NullDatum.get();
}
switch (keyTypes[i]) {
case NULL_TYPE:
return NullDatum.get();
case BOOLEAN:
return DatumFactory.createBool((Boolean) keys[i]);
case BIT:
return DatumFactory.createBit((Byte) keys[i]);
case INT1:
case INT2:
return DatumFactory.createInt2((Short) keys[i]);
case INT4:
return DatumFactory.createInt4((Integer) keys[i]);
case DATE:
return DatumFactory.createDate((Integer) keys[i]);
case INT8:
return DatumFactory.createInt8((Long) keys[i]);
case TIME:
return DatumFactory.createTime((Long) keys[i]);
case TIMESTAMP:
return DatumFactory.createTimestamp((Long) keys[i]);
case FLOAT4:
return DatumFactory.createFloat4((Float) keys[i]);
case FLOAT8:
return DatumFactory.createFloat8((Double) keys[i]);
case TEXT:
return DatumFactory.createText((byte[]) keys[i]);
case CHAR:
return DatumFactory.createChar((byte[]) keys[i]);
case BLOB:
return DatumFactory.createBlob((byte[]) keys[i]);
case DATUM:
return (Datum) keys[i];
default:
throw new IllegalArgumentException();
}
}