/**
* Implementation of {@link #build()} and {@link #finish()}.
*
* @param reuse Whether we should try to reuse the builder's storage for the packed list. If
* {@code true}, the builder will be invalid after finishing and the packed list will use the
* same arrays as the builder if they are full.
* @return The packed ID list.
*/
private PackedScoredIdList finish(boolean reuse) {
Preconditions.checkState(ids != null, "builder has been finished");
Map<Symbol, DoubleList> chans;
Map<TypedSymbol<?>, List<?>> typedChans;
if (size() > 0) {
ImmutableMap.Builder<Symbol, DoubleList> cbld = ImmutableMap.builder();
for (ChannelStorage chan : channels.values()) {
DoubleArrayList built;
if (reuse) {
built = chan.values;
built.trim();
} else {
built = new DoubleArrayList(chan.values);
}
cbld.put(chan.symbol, built);
}
chans = cbld.build();
ImmutableMap.Builder<TypedSymbol<?>, List<?>> tcbld = ImmutableMap.builder();
for (TypedChannelStorage<?> chan : typedChannels.values()) {
List<?> built;
if (reuse) {
chan.values.trimToSize();
built = chan.values;
} else {
built = new ArrayList<Object>(chan.values);
}
tcbld.put(chan.symbol, built);
}
typedChans = tcbld.build();
} else {
chans = Collections.emptyMap();
typedChans = Collections.emptyMap();
}
LongList builtIds;
DoubleList builtScores;
if (reuse) {
ids.trim();
builtIds = ids;
scores.trim();
builtScores = scores;
clear();
} else {
builtIds = new CompactableLongArrayList(ids);
builtScores = new DoubleArrayList(scores);
}
return new PackedScoredIdList(builtIds, builtScores, typedChans, chans);
}
@Override
public void seal() {
((DoubleArrayList) _innerList).trim();
_elements = ((DoubleArrayList) _innerList).elements();
int negativeIndexCheck = 1;
// reverse negative elements, because string order and numeric orders are completely opposite
if (_elements.length > negativeIndexCheck && _elements[negativeIndexCheck] < 0) {
int endPosition = indexOfWithType((short) 0);
if (endPosition < 0) {
endPosition = -1 * endPosition - 1;
}
double tmp;
for (int i = 0; i < (endPosition - negativeIndexCheck) / 2; i++) {
tmp = _elements[i + negativeIndexCheck];
_elements[i + negativeIndexCheck] = _elements[endPosition - i - 1];
_elements[endPosition - i - 1] = tmp;
}
}
}
