@Override
public IndexIterator iter(final IndexToken token) {
final int id = values.id(token.get());
if (id == 0) return IndexIterator.EMPTY;
final int len = lenList.get(id);
final int[] ids = idsList.get(id), pres;
if (data.meta.updindex) {
final IntList tmp = new IntList();
for (int i = 0; i < len; ++i) tmp.add(data.pre(ids[i]));
pres = tmp.sort().finish();
} else {
pres = ids;
}
return new IndexIterator() {
int p;
@Override
public boolean more() {
return p < len;
}
@Override
public int pre() {
return pres[p++];
}
@Override
public int size() {
return len;
}
};
}
@Override
public synchronized int costs(final IndexToken it) {
final byte[] tok = it.get();
if (tok.length > data.meta.maxlen) return Integer.MAX_VALUE;
// estimate costs for queries which stretch over multiple index entries
final FTOpt opt = ((FTLexer) it).ftOpt();
if (opt.is(FZ) || opt.is(WC)) return Math.max(1, data.meta.size >> 4);
return entry(tok).size;
}
@Override
public synchronized IndexIterator iter(final IndexToken it) {
final byte[] tok = it.get();
// wildcard search
final FTLexer lexer = (FTLexer) it;
final FTOpt opt = lexer.ftOpt();
if (opt.is(WC)) return wc(tok);
// fuzzy search
if (opt.is(FZ)) return fuzzy(tok, lexer.lserror(tok));
// return cached or new result
final IndexEntry e = entry(tok);
return e.size > 0 ? iter(e.offset, e.size, inZ, tok) : FTIndexIterator.FTEMPTY;
}
/**
* Returns the number of indexed pre references for the specified token.
*
* @param token text to be found
* @return number of hits
*/
public final int count(final IndexToken token) {
return index(token.type()).count(token);
}
/**
* Returns the indexed pre references for the specified token.
*
* @param token index token reference
* @return array of sorted pre values
*/
public final IndexIterator iter(final IndexToken token) {
return index(token.type()).iter(token);
}
@Override
public int costs(final IndexToken it) {
return lenList.get(values.id(it.get()));
}