Examples with InputOutput org.apache.lucene.util.fst.BytesRefFSTEnum.InputOutput used on opensource projects

Example 1 with InputOutput

use of org.apache.lucene.util.fst.BytesRefFSTEnum.InputOutput in project lucene-solr by apache.

the class MemoryDocValuesProducer method getSortedSet.

@Override
public SortedSetDocValues getSortedSet(FieldInfo field) throws IOException {
    SortedSetEntry sortedSetEntry = sortedSets.get(field.name);
    if (sortedSetEntry.singleton) {
        return DocValues.singleton(getSorted(field));
    }
    final FSTEntry entry = fsts.get(field.name);
    if (entry.numOrds == 0) {
        // empty FST!
        return DocValues.emptySortedSet();
    }
    FST<Long> instance;
    synchronized (this) {
        instance = fstInstances.get(field.name);
        if (instance == null) {
            IndexInput data = this.data.clone();
            data.seek(entry.offset);
            instance = new FST<>(data, PositiveIntOutputs.getSingleton());
            if (!merging) {
                ramBytesUsed.addAndGet(instance.ramBytesUsed());
                fstInstances.put(field.name, instance);
            }
        }
    }
    final LegacyBinaryDocValues docToOrds = getLegacyBinary(field);
    final FST<Long> fst = instance;
    // per-thread resources
    final BytesReader in = fst.getBytesReader();
    final Arc<Long> firstArc = new Arc<>();
    final Arc<Long> scratchArc = new Arc<>();
    final IntsRefBuilder scratchInts = new IntsRefBuilder();
    final BytesRefFSTEnum<Long> fstEnum = new BytesRefFSTEnum<>(fst);
    final ByteArrayDataInput input = new ByteArrayDataInput();
    return new LegacySortedSetDocValuesWrapper(new LegacySortedSetDocValues() {

        final BytesRefBuilder term = new BytesRefBuilder();

        BytesRef ref;

        long currentOrd;

        @Override
        public long nextOrd() {
            if (input.eof()) {
                return NO_MORE_ORDS;
            } else {
                currentOrd += input.readVLong();
                return currentOrd;
            }
        }

        @Override
        public void setDocument(int docID) {
            ref = docToOrds.get(docID);
            input.reset(ref.bytes, ref.offset, ref.length);
            currentOrd = 0;
        }

        @Override
        public BytesRef lookupOrd(long ord) {
            try {
                in.setPosition(0);
                fst.getFirstArc(firstArc);
                IntsRef output = Util.getByOutput(fst, ord, in, firstArc, scratchArc, scratchInts);
                return Util.toBytesRef(output, term);
            } catch (IOException bogus) {
                throw new RuntimeException(bogus);
            }
        }

        @Override
        public long lookupTerm(BytesRef key) {
            try {
                InputOutput<Long> o = fstEnum.seekCeil(key);
                if (o == null) {
                    return -getValueCount() - 1;
                } else if (o.input.equals(key)) {
                    return o.output.intValue();
                } else {
                    return -o.output - 1;
                }
            } catch (IOException bogus) {
                throw new RuntimeException(bogus);
            }
        }

        @Override
        public long getValueCount() {
            return entry.numOrds;
        }

        @Override
        public TermsEnum termsEnum() {
            return new FSTTermsEnum(fst);
        }
    }, maxDoc);
}