@Override
protected <U extends IValue> Result<U> addTuple(TupleResult that) {
// Note reversed args
TupleResult left = that;
TupleResult right = this;
Type leftType = left.getType();
Type rightType = right.getType();
int leftArity = leftType.getArity();
int rightArity = rightType.getArity();
int newArity = leftArity + rightArity;
Type fieldTypes[] = new Type[newArity];
String fieldNames[] = new String[newArity];
IValue fieldValues[] = new IValue[newArity];
boolean consistentLabels = true;
for (int i = 0; i < leftArity; i++) {
fieldTypes[i] = leftType.getFieldType(i);
fieldNames[i] = leftType.getFieldName(i);
fieldValues[i] = left.getValue().get(i);
consistentLabels = fieldNames[i] != null;
}
for (int i = 0; i < rightArity; i++) {
fieldTypes[leftArity + i] = rightType.getFieldType(i);
fieldNames[leftArity + i] = rightType.getFieldName(i);
fieldValues[leftArity + i] = right.getValue().get(i);
consistentLabels = fieldNames[i] != null;
if (consistentLabels) {
for (int j = 0; j < leftArity; j++) {
if (fieldNames[j].equals(fieldNames[i])) {
// duplicate field name, so degenerate to unlabeled tuple
consistentLabels = false;
}
}
}
}
Type newTupleType;
if (consistentLabels) {
newTupleType = getTypeFactory().tupleType(fieldTypes, fieldNames);
} else {
newTupleType = getTypeFactory().tupleType(fieldTypes);
}
return makeResult(newTupleType, getValueFactory().tuple(fieldValues), ctx);
}
@Override
protected <U extends IValue> Result<U> compareTuple(TupleResult that) {
// Note reversed args
ITuple left = that.getValue();
ITuple right = this.getValue();
int compare = Integer.valueOf(left.arity()).compareTo(Integer.valueOf(right.arity()));
if (compare != 0) {
return makeIntegerResult(compare);
}
for (int i = 0; i < left.arity(); i++) {
compare = compareIValues(left.get(i), right.get(i), ctx);
if (compare != 0) {
return makeIntegerResult(compare);
}
}
return makeIntegerResult(0);
}