}
@Override
protected IScalarEvaluator createEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args)
throws AlgebricksException {
final UTF8StringPointable stringp = (UTF8StringPointable) UTF8StringPointable.FACTORY.createPointable();
final ArrayBackedValueStorage abvs = new ArrayBackedValueStorage();
final ArrayBackedValueStorage abvsInner = new ArrayBackedValueStorage();
final DataOutput dOutInner = abvsInner.getDataOutput();
final CastToStringOperation castToString = new CastToStringOperation();
final TypedPointables tp = new TypedPointables();
return new AbstractTaggedValueArgumentScalarEvaluator(args) {
@Override
protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException {
abvs.reset();
try {
// Byte Format: Type (1 byte) + String Byte Length (2 bytes) + String.
DataOutput out = abvs.getDataOutput();
out.write(ValueTag.XS_STRING_TAG);
// Default values for the length and update later
out.write(0xFF);
out.write(0xFF);
for (int i = 0; i < args.length; i++) {
TaggedValuePointable tvp = args[i];
// TODO Update function to support cast to a string from any atomic value.
if (!FunctionHelper.isDerivedFromString(tvp.getTag())) {
try {
abvsInner.reset();
switch (tvp.getTag()) {
case ValueTag.XS_ANY_URI_TAG:
tvp.getValue(tp.utf8sp);
castToString.convertAnyURI(tp.utf8sp, dOutInner);
break;
case ValueTag.XS_UNTYPED_ATOMIC_TAG:
tvp.getValue(tp.utf8sp);
castToString.convertUntypedAtomic(tp.utf8sp, dOutInner);
break;
case ValueTag.XS_BASE64_BINARY_TAG:
tvp.getValue(tp.binaryp);
castToString.convertBase64Binary(tp.binaryp, dOutInner);
break;
case ValueTag.XS_HEX_BINARY_TAG:
tvp.getValue(tp.binaryp);
castToString.convertHexBinary(tp.binaryp, dOutInner);
break;
case ValueTag.XS_BOOLEAN_TAG:
tvp.getValue(tp.boolp);
castToString.convertBoolean(tp.boolp, dOutInner);
break;
case ValueTag.XS_DATETIME_TAG:
tvp.getValue(tp.datetimep);
castToString.convertDatetime(tp.datetimep, dOutInner);
break;
case ValueTag.XS_DAY_TIME_DURATION_TAG:
tvp.getValue(tp.longp);
castToString.convertDTDuration(tp.longp, dOutInner);
break;
case ValueTag.XS_INTEGER_TAG:
case ValueTag.XS_NON_POSITIVE_INTEGER_TAG:
case ValueTag.XS_NEGATIVE_INTEGER_TAG:
case ValueTag.XS_LONG_TAG:
case ValueTag.XS_NON_NEGATIVE_INTEGER_TAG:
case ValueTag.XS_UNSIGNED_LONG_TAG:
case ValueTag.XS_POSITIVE_INTEGER_TAG:
case ValueTag.XS_UNSIGNED_INT_TAG:
tvp.getValue(tp.longp);
castToString.convertInteger(tp.longp, dOutInner);
break;
case ValueTag.XS_DURATION_TAG:
tvp.getValue(tp.durationp);
castToString.convertDuration(tp.durationp, dOutInner);
break;
case ValueTag.XS_DATE_TAG:
tvp.getValue(tp.datep);
castToString.convertDate(tp.datep, dOutInner);
break;
case ValueTag.XS_G_DAY_TAG:
tvp.getValue(tp.datep);
castToString.convertGDay(tp.datep, dOutInner);
break;
case ValueTag.XS_G_MONTH_DAY_TAG:
tvp.getValue(tp.datep);
castToString.convertGMonthDay(tp.datep, dOutInner);
break;
case ValueTag.XS_G_MONTH_TAG:
tvp.getValue(tp.datep);
castToString.convertGMonth(tp.datep, dOutInner);
break;
case ValueTag.XS_G_YEAR_MONTH_TAG:
tvp.getValue(tp.datep);
castToString.convertGYearMonth(tp.datep, dOutInner);
break;
case ValueTag.XS_G_YEAR_TAG:
tvp.getValue(tp.datep);
castToString.convertGYear(tp.datep, dOutInner);
break;
case ValueTag.XS_QNAME_TAG:
tvp.getValue(tp.qnamep);
castToString.convertQName(tp.qnamep, dOutInner);
break;
case ValueTag.XS_TIME_TAG:
tvp.getValue(tp.timep);
castToString.convertTime(tp.timep, dOutInner);
break;
case ValueTag.XS_YEAR_MONTH_DURATION_TAG:
tvp.getValue(tp.intp);
castToString.convertYMDuration(tp.intp, dOutInner);
break;
case ValueTag.XS_INT_TAG:
case ValueTag.XS_UNSIGNED_SHORT_TAG:
tvp.getValue(tp.intp);
castToString.convertInt(tp.intp, dOutInner);
break;
case ValueTag.XS_DECIMAL_TAG:
tvp.getValue(tp.decp);
castToString.convertDecimal(tp.decp, dOutInner);
break;
case ValueTag.XS_DOUBLE_TAG:
tvp.getValue(tp.doublep);
castToString.convertDouble(tp.doublep, dOutInner);
break;
case ValueTag.XS_FLOAT_TAG:
tvp.getValue(tp.floatp);
castToString.convertFloat(tp.floatp, dOutInner);
break;
case ValueTag.XS_SHORT_TAG:
case ValueTag.XS_UNSIGNED_BYTE_TAG:
tvp.getValue(tp.shortp);
castToString.convertShort(tp.shortp, dOutInner);
break;
case ValueTag.XS_BYTE_TAG:
tvp.getValue(tp.bytep);
castToString.convertByte(tp.bytep, dOutInner);
break;
case ValueTag.SEQUENCE_TAG:
tvp.getValue(tp.seqp);
if (tp.seqp.getEntryCount() == 0) {
// Byte Format: Type (1 byte) + String Length (2 bytes) + String.
dOutInner.write(ValueTag.XS_STRING_TAG);
dOutInner.write(0);
dOutInner.write(0);
break;
}
// Pass through if not empty sequence.
default:
throw new SystemException(ErrorCode.XPTY0004);
}
stringp.set(abvsInner.getByteArray(), abvsInner.getStartOffset() + 1,
abvsInner.getLength() - 1);
} catch (IOException e) {
throw new SystemException(ErrorCode.SYSE0001, e);
}
} else {
tvp.getValue(stringp);
}
// If its an empty string do nothing.
if (stringp.getUTFLength() > 0) {
out.write(stringp.getByteArray(), stringp.getStartOffset() + 2, stringp.getUTFLength());
}
}
// Update the full length string in the byte array.
abvs.getByteArray()[1] = (byte) (((abvs.getLength() - 3) >>> 8) & 0xFF);