public static Sequence atomize(Sequence input) throws XPathException {
if (input.hasOne()) return input.itemAt(0).atomize();
Item next;
ValueSequence result = new ValueSequence();
for (SequenceIterator i = input.iterate(); i.hasNext(); ) {
next = i.nextItem();
result.add(next.atomize());
}
return result;
}
/* (non-Javadoc)
* @see org.exist.xquery.value.AbstractSequence#addAll(org.exist.xquery.value.Sequence)
*/
public void addAll(Sequence other) throws XPathException {
if (other.hasOne()) {
add(other.itemAt(0));
} else if (!other.isEmpty()) {
for (final SequenceIterator i = other.iterate(); i.hasNext(); ) {
final Item next = i.nextItem();
if (next != null) {
add(next);
}
}
}
}
public Entry(Item item) throws XPathException {
this.item = item;
values = new AtomicValue[groupSpecs.length];
for (int i = 0; i < groupSpecs.length; i++) {
final Sequence seq = groupSpecs[i].getGroupExpression().eval(null);
values[i] = AtomicValue.EMPTY_VALUE;
// TODO : get rid of getLength()
if (seq.hasOne()) {
values[i] = seq.itemAt(0).atomize();
} else if (seq.hasMany()) {
throw new XPathException(
"expected a single value for group by expression "
+ ExpressionDumper.dump(groupSpecs[i].getGroupExpression())
+ " ; found: "
+ seq.getItemCount());
}
}
}