@Override
public NumericDocValues getNorms(FieldInfo field) throws IOException {
final NormsEntry entry = norms.get(field.number);
if (entry.docsWithFieldOffset == -2) {
// empty
return DocValues.emptyNumeric();
} else if (entry.docsWithFieldOffset == -1) {
// dense
final LongValues normValues = getNormValues(entry);
return new NumericDocValues() {
int doc = -1;
@Override
public long longValue() throws IOException {
return normValues.get(doc);
}
@Override
public int docID() {
return doc;
}
@Override
public int nextDoc() throws IOException {
return advance(doc + 1);
}
@Override
public int advance(int target) throws IOException {
if (target >= maxDoc) {
return doc = NO_MORE_DOCS;
}
return doc = target;
}
@Override
public long cost() {
return maxDoc;
}
};
} else {
// sparse
final LongValues normValues = getNormValues(entry);
final SparseDISI disi;
synchronized (data) {
disi = new SparseDISI(maxDoc, data, entry.docsWithFieldOffset, entry.numDocsWithField);
}
return new NumericDocValues() {
@Override
public int advance(int target) throws IOException {
return disi.advance(target);
}
@Override
public int nextDoc() throws IOException {
return disi.nextDoc();
}
@Override
public int docID() {
return disi.docID();
}
@Override
public long cost() {
return entry.numDocsWithField;
}
@Override
public long longValue() throws IOException {
return normValues.get(disi.index());
}
};
}
}
