示例#1
0
      private void decodeMetaData() throws IOException {
        // System.out.println("BTR.decodeMetadata mdUpto=" + metaDataUpto + " vs termCount=" +
        // state.termBlockOrd + " state=" + state);
        if (!seekPending) {
          // TODO: cutover to random-access API
          // here.... really stupid that we have to decode N
          // wasted term metadata just to get to the N+1th
          // that we really need...

          // lazily catch up on metadata decode:
          final int limit = state.termBlockOrd;
          boolean absolute = metaDataUpto == 0;
          // TODO: better API would be "jump straight to term=N"???
          while (metaDataUpto < limit) {
            // System.out.println("  decode mdUpto=" + metaDataUpto);
            // TODO: we could make "tiers" of metadata, ie,
            // decode docFreq/totalTF but don't decode postings
            // metadata; this way caller could get
            // docFreq/totalTF w/o paying decode cost for
            // postings

            // TODO: if docFreq were bulk decoded we could
            // just skipN here:

            // docFreq, totalTermFreq
            state.docFreq = freqReader.readVInt();
            // System.out.println("    dF=" + state.docFreq);
            if (fieldInfo.getIndexOptions() != IndexOptions.DOCS) {
              state.totalTermFreq = state.docFreq + freqReader.readVLong();
              // System.out.println("    totTF=" + state.totalTermFreq);
            }
            // metadata
            for (int i = 0; i < longs.length; i++) {
              longs[i] = bytesReader.readVLong();
            }
            postingsReader.decodeTerm(longs, bytesReader, fieldInfo, state, absolute);
            metaDataUpto++;
            absolute = false;
          }
        } else {
          // System.out.println("  skip! seekPending");
        }
      }
  // Pushes a frame we seek'd to
  IDVersionSegmentTermsEnumFrame pushFrame(
      FST.Arc<Pair<BytesRef, Long>> arc, Pair<BytesRef, Long> frameData, int length)
      throws IOException {
    scratchReader.reset(
        frameData.output1.bytes, frameData.output1.offset, frameData.output1.length);
    final long code = scratchReader.readVLong();
    final long fpSeek = code >>> VersionBlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS;
    final IDVersionSegmentTermsEnumFrame f = getFrame(1 + currentFrame.ord);
    f.maxIDVersion = Long.MAX_VALUE - frameData.output2;
    f.hasTerms = (code & VersionBlockTreeTermsWriter.OUTPUT_FLAG_HAS_TERMS) != 0;
    f.hasTermsOrig = f.hasTerms;
    f.isFloor = (code & VersionBlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR) != 0;
    if (f.isFloor) {
      f.setFloorData(scratchReader, frameData.output1);
    }
    pushFrame(arc, fpSeek, length);

    return f;
  }
 @SuppressWarnings("unused")
 private void printSeekState(PrintStream out) throws IOException {
   if (currentFrame == staticFrame) {
     out.println("  no prior seek");
   } else {
     out.println("  prior seek state:");
     int ord = 0;
     boolean isSeekFrame = true;
     while (true) {
       IDVersionSegmentTermsEnumFrame f = getFrame(ord);
       assert f != null;
       final BytesRef prefix = new BytesRef(term.bytes(), 0, f.prefix);
       if (f.nextEnt == -1) {
         out.println(
             "    frame "
                 + (isSeekFrame ? "(seek)" : "(next)")
                 + " ord="
                 + ord
                 + " fp="
                 + f.fp
                 + (f.isFloor ? (" (fpOrig=" + f.fpOrig + ")") : "")
                 + " prefixLen="
                 + f.prefix
                 + " prefix="
                 + brToString(prefix)
                 + (f.nextEnt == -1 ? "" : (" (of " + f.entCount + ")"))
                 + " hasTerms="
                 + f.hasTerms
                 + " isFloor="
                 + f.isFloor
                 + " code="
                 + ((f.fp << VersionBlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS)
                     + (f.hasTerms ? VersionBlockTreeTermsWriter.OUTPUT_FLAG_HAS_TERMS : 0)
                     + (f.isFloor ? VersionBlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR : 0))
                 + " isLastInFloor="
                 + f.isLastInFloor
                 + " mdUpto="
                 + f.metaDataUpto
                 + " tbOrd="
                 + f.getTermBlockOrd());
       } else {
         out.println(
             "    frame "
                 + (isSeekFrame ? "(seek, loaded)" : "(next, loaded)")
                 + " ord="
                 + ord
                 + " fp="
                 + f.fp
                 + (f.isFloor ? (" (fpOrig=" + f.fpOrig + ")") : "")
                 + " prefixLen="
                 + f.prefix
                 + " prefix="
                 + brToString(prefix)
                 + " nextEnt="
                 + f.nextEnt
                 + (f.nextEnt == -1 ? "" : (" (of " + f.entCount + ")"))
                 + " hasTerms="
                 + f.hasTerms
                 + " isFloor="
                 + f.isFloor
                 + " code="
                 + ((f.fp << VersionBlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS)
                     + (f.hasTerms ? VersionBlockTreeTermsWriter.OUTPUT_FLAG_HAS_TERMS : 0)
                     + (f.isFloor ? VersionBlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR : 0))
                 + " lastSubFP="
                 + f.lastSubFP
                 + " isLastInFloor="
                 + f.isLastInFloor
                 + " mdUpto="
                 + f.metaDataUpto
                 + " tbOrd="
                 + f.getTermBlockOrd());
       }
       if (fr.index != null) {
         assert !isSeekFrame || f.arc != null : "isSeekFrame=" + isSeekFrame + " f.arc=" + f.arc;
         if (f.prefix > 0 && isSeekFrame && f.arc.label != (term.byteAt(f.prefix - 1) & 0xFF)) {
           out.println(
               "      broken seek state: arc.label="
                   + (char) f.arc.label
                   + " vs term byte="
                   + (char) (term.byteAt(f.prefix - 1) & 0xFF));
           throw new RuntimeException("seek state is broken");
         }
         Pair<BytesRef, Long> output = Util.get(fr.index, prefix);
         if (output == null) {
           out.println("      broken seek state: prefix is not final in index");
           throw new RuntimeException("seek state is broken");
         } else if (isSeekFrame && !f.isFloor) {
           final ByteArrayDataInput reader =
               new ByteArrayDataInput(
                   output.output1.bytes, output.output1.offset, output.output1.length);
           final long codeOrig = reader.readVLong();
           final long code =
               (f.fp << VersionBlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS)
                   | (f.hasTerms ? VersionBlockTreeTermsWriter.OUTPUT_FLAG_HAS_TERMS : 0)
                   | (f.isFloor ? VersionBlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR : 0);
           if (codeOrig != code) {
             out.println(
                 "      broken seek state: output code="
                     + codeOrig
                     + " doesn't match frame code="
                     + code);
             throw new RuntimeException("seek state is broken");
           }
         }
       }
       if (f == currentFrame) {
         break;
       }
       if (f.prefix == validIndexPrefix) {
         isSeekFrame = false;
       }
       ord++;
     }
   }
 }