@Override public void write( Directory directory, SegmentInfo segmentInfo, String segmentSuffix, FieldInfos infos, IOContext context) throws IOException { final String fileName = IndexFileNames.segmentFileName( segmentInfo.name, segmentSuffix, Lucene46FieldInfosFormat.EXTENSION); try (IndexOutput output = directory.createOutput(fileName, context)) { CodecUtil.writeHeader( output, Lucene46FieldInfosFormat.CODEC_NAME, Lucene46FieldInfosFormat.FORMAT_CURRENT); output.writeVInt(infos.size()); for (FieldInfo fi : infos) { IndexOptions indexOptions = fi.getIndexOptions(); byte bits = 0x0; if (fi.hasVectors()) bits |= Lucene46FieldInfosFormat.STORE_TERMVECTOR; if (fi.omitsNorms()) bits |= Lucene46FieldInfosFormat.OMIT_NORMS; if (fi.hasPayloads()) bits |= Lucene46FieldInfosFormat.STORE_PAYLOADS; if (fi.getIndexOptions() != IndexOptions.NONE) { bits |= Lucene46FieldInfosFormat.IS_INDEXED; assert indexOptions.compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0 || !fi.hasPayloads(); if (indexOptions == IndexOptions.DOCS) { bits |= Lucene46FieldInfosFormat.OMIT_TERM_FREQ_AND_POSITIONS; } else if (indexOptions == IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS) { bits |= Lucene46FieldInfosFormat.STORE_OFFSETS_IN_POSTINGS; } else if (indexOptions == IndexOptions.DOCS_AND_FREQS) { bits |= Lucene46FieldInfosFormat.OMIT_POSITIONS; } } output.writeString(fi.name); output.writeVInt(fi.number); output.writeByte(bits); // pack the DV types in one byte final byte dv = docValuesByte(fi.getDocValuesType()); final byte nrm = docValuesByte(fi.hasNorms() ? DocValuesType.NUMERIC : DocValuesType.NONE); assert (dv & (~0xF)) == 0 && (nrm & (~0x0F)) == 0; byte val = (byte) (0xff & ((nrm << 4) | dv)); output.writeByte(val); output.writeLong(fi.getDocValuesGen()); output.writeStringStringMap(fi.attributes()); } CodecUtil.writeFooter(output); } }