/** Finishes the index creation. */
void finish() {
if (reorder == null) return;
for (int i = 1; i < reorder.size(); i++) {
if (reorder.get(i)) Arrays.sort(idsList.get(i), 0, lenList.get(i));
}
reorder = null;
}
@Override
public void rehash() {
super.rehash();
final int s = size << 1;
ids = Array.copyOf(ids, s);
len = Arrays.copyOf(len, s);
}
/**
* Indexes the specified keys and values.
*
* @param key key
* @param id id value
* @return index position
*/
public int index(final byte[] key, final int id) {
int i = add(key);
if (i > 0) {
ids[i] = new int[] {id};
} else {
i = -i;
final int l = len[i];
if (l == ids[i].length) ids[i] = Arrays.copyOf(ids[i], l << 1);
ids[i][l] = id;
}
len[i]++;
return i;
}
/**
* Adds values to the index.
*
* @param key key to be indexed
* @param vals sorted values
*/
void add(final byte[] key, final int... vals) {
// token index: add values. otherwise, reference existing values
final int id = type == IndexType.TOKEN ? values.put(key) : values.id(key), vl = vals.length;
// updatable index: if required, resize existing arrays
while (idsList.size() < id + 1) idsList.add(null);
if (lenList.size() < id + 1) lenList.set(id, 0);
final int len = lenList.get(id), size = len + vl;
int[] ids = idsList.get(id);
if (ids == null) {
ids = vals;
} else {
if (ids.length < size) ids = Arrays.copyOf(ids, Array.newSize(size));
System.arraycopy(vals, 0, ids, len, vl);
if (ids[len - 1] > vals[0]) {
if (reorder == null) reorder = new BoolList(values.size());
reorder.set(id, true);
}
}
idsList.set(id, ids);
lenList.set(id, size);
}
/**
* Returns the byte buffer.
*
* @return byte buffer
*/
private byte[] buffer() {
final byte[] bb = bp == b.length ? b : Arrays.copyOf(b, bp);
bp = 0;
return bb;
}