final UTF8StringPointable stringp2 = (UTF8StringPointable) UTF8StringPointable.FACTORY.createPointable();
final UTF8StringPointable stringp3 = (UTF8StringPointable) UTF8StringPointable.FACTORY.createPointable();
final ICharacterIterator charIterator1 = new UTF8StringCharacterIterator(stringp1);
final ICharacterIterator charIterator2 = new UTF8StringCharacterIterator(stringp2);
final SequencePointable seqp = (SequencePointable) SequencePointable.FACTORY.createPointable();
final TaggedValuePointable tvp = (TaggedValuePointable) TaggedValuePointable.FACTORY.createPointable();
return new AbstractTaggedValueArgumentScalarEvaluator(args) {
@Override
protected void evaluate(TaggedValuePointable[] args, IPointable result) throws SystemException {
// Default result is false.
byte[] booleanResult = new byte[2];
booleanResult[0] = ValueTag.XS_BOOLEAN_TAG;
booleanResult[1] = 0;
TaggedValuePointable tvp1 = args[0];
TaggedValuePointable tvp2 = args[1];
// Only accept strings as input.
if (tvp1.getTag() == ValueTag.SEQUENCE_TAG) {
tvp1.getValue(seqp);
if (seqp.getEntryCount() == 0) {
XDMConstants.setEmptyString(tvp);
tvp.getValue(stringp1);
} else {
throw new SystemException(ErrorCode.FORG0006);
}
} else {
if (!FunctionHelper.isDerivedFromString(tvp1.getTag())) {
throw new SystemException(ErrorCode.FORG0006);
}
tvp1.getValue(stringp1);
}
if (tvp2.getTag() == ValueTag.SEQUENCE_TAG) {
tvp2.getValue(seqp);
if (seqp.getEntryCount() == 0) {
XDMConstants.setEmptyString(tvp);
tvp.getValue(stringp2);
} else {
throw new SystemException(ErrorCode.FORG0006);
}
} else {
if (!FunctionHelper.isDerivedFromString(tvp2.getTag())) {
throw new SystemException(ErrorCode.FORG0006);
}
tvp2.getValue(stringp2);
}
charIterator1.reset();
charIterator2.reset();
// Third parameter is optional.
if (args.length > 2) {
TaggedValuePointable tvp3 = args[2];
if (!FunctionHelper.isDerivedFromString(tvp3.getTag())) {
throw new SystemException(ErrorCode.FORG0006);
}
tvp3.getValue(stringp3);
}
// TODO use the third value as collation
// Only need to run comparisons if they both have a non empty string.
if (stringp1.getLength() > 2 && stringp2.getLength() > 2) {