static CompressedState importFromMemory()

in src/main/java/org/apache/datasketches/cpc/CompressedState.java [121:221]
82 lines of code
9 McCabe index (conditional complexity)

  static CompressedState importFromMemory(final Memory mem) {
    checkLoPreamble(mem);
    rtAssert(isCompressed(mem));
    final int lgK = getLgK(mem);
    final short seedHash = getSeedHash(mem);
    final CompressedState state = new CompressedState(lgK, seedHash);
    final int fmtOrd = getFormatOrdinal(mem);
    final Format format = Format.ordinalToFormat(fmtOrd);
    state.mergeFlag = !((fmtOrd & 1) > 0); //merge flag is complement of HIP
    state.csvIsValid = (fmtOrd & 2) > 0;
    state.windowIsValid = (fmtOrd & 4) > 0;

    switch (format) {
      case EMPTY_MERGED :
      case EMPTY_HIP : {
        checkCapacity(mem.getCapacity(), 8L);
        break;
      }
      case SPARSE_HYBRID_MERGED : {
        //state.fiCol = getFiCol(mem);
        state.numCoupons = getNumCoupons(mem);
        state.numCsv = (int) state.numCoupons; //only true for sparse_hybrid
        state.csvLengthInts = getSvLengthInts(mem);
        //state.cwLength = getCwLength(mem);
        //state.kxp = getKxP(mem);
        //state.hipEstAccum = getHipAccum(mem);
        checkCapacity(mem.getCapacity(), state.getRequiredSerializedBytes());
        //state.cwStream = getCwStream(mem);
        state.csvStream = getSvStream(mem);
        break;
      }
      case SPARSE_HYBRID_HIP : {
        //state.fiCol = getFiCol(mem);
        state.numCoupons = getNumCoupons(mem);
        state.numCsv = (int) state.numCoupons; //only true for sparse_hybrid
        state.csvLengthInts = getSvLengthInts(mem);
        //state.cwLength = getCwLength(mem);
        state.kxp = getKxP(mem);
        state.hipEstAccum = getHipAccum(mem);
        checkCapacity(mem.getCapacity(), state.getRequiredSerializedBytes());
        //state.cwStream = getCwStream(mem);
        state.csvStream = getSvStream(mem);
        break;
      }
      case PINNED_SLIDING_MERGED_NOSV : {
        state.fiCol = getFiCol(mem);
        state.numCoupons = getNumCoupons(mem);
        //state.numCsv = getNumCsv(mem);
        //state.csvLength = getCsvLength(mem);
        state.cwLengthInts = getWLengthInts(mem);
        //state.kxp = getKxP(mem);
        //state.hipEstAccum = getHipAccum(mem);
        checkCapacity(mem.getCapacity(), state.getRequiredSerializedBytes());
        state.cwStream = getWStream(mem);
        //state.csvStream = getCsvStream(mem);
        break;
      }
      case PINNED_SLIDING_HIP_NOSV : {
        state.fiCol = getFiCol(mem);
        state.numCoupons = getNumCoupons(mem);
        //state.numCsv = getNumCsv(mem);
        //state.csvLength = getCsvLength(mem);
        state.cwLengthInts = getWLengthInts(mem);
        state.kxp = getKxP(mem);
        state.hipEstAccum = getHipAccum(mem);
        checkCapacity(mem.getCapacity(), state.getRequiredSerializedBytes());
        state.cwStream = getWStream(mem);
        //state.csvStream = getCsvStream(mem);
        break;
      }
      case PINNED_SLIDING_MERGED : {
        state.fiCol = getFiCol(mem);
        state.numCoupons = getNumCoupons(mem);
        state.numCsv = getNumSv(mem);
        state.csvLengthInts = getSvLengthInts(mem);
        state.cwLengthInts = getWLengthInts(mem);
        //state.kxp = getKxP(mem);
        //state.hipEstAccum = getHipAccum(mem);
        checkCapacity(mem.getCapacity(), state.getRequiredSerializedBytes());
        state.cwStream = getWStream(mem);
        state.csvStream = getSvStream(mem);
        break;
      }
      case PINNED_SLIDING_HIP : {
        state.fiCol = getFiCol(mem);
        state.numCoupons = getNumCoupons(mem);
        state.numCsv = getNumSv(mem);
        state.csvLengthInts = getSvLengthInts(mem);
        state.cwLengthInts = getWLengthInts(mem);
        state.kxp = getKxP(mem);
        state.hipEstAccum = getHipAccum(mem);
        checkCapacity(mem.getCapacity(), state.getRequiredSerializedBytes());
        state.cwStream = getWStream(mem);
        state.csvStream = getSvStream(mem);
        break;
      }
    }
    checkCapacity(mem.getCapacity(),
        4L * (getPreInts(mem) + state.csvLengthInts + state.cwLengthInts));
    return state;
  }