Exemplo n.º 1
0
  private static Node deserializeNode(DataInput input) throws IOException {
    int level = input.readUnsignedByte();
    long value = input.readLong();
    double weight = input.readDouble();

    return new Node(value, level, weight);
  }
Exemplo n.º 2
0
 @Override
 public void readFields(DataInput input) throws IOException {
   byte[] tableNameBytes = Bytes.readByteArray(input);
   PName tableName = new PNameImpl(tableNameBytes);
   PTableType tableType = PTableType.values()[WritableUtils.readVInt(input)];
   long sequenceNumber = WritableUtils.readVLong(input);
   long timeStamp = input.readLong();
   byte[] pkNameBytes = Bytes.readByteArray(input);
   String pkName = pkNameBytes.length == 0 ? null : Bytes.toString(pkNameBytes);
   int nColumns = WritableUtils.readVInt(input);
   List<PColumn> columns = Lists.newArrayListWithExpectedSize(nColumns);
   for (int i = 0; i < nColumns; i++) {
     PColumn column = new PColumnImpl();
     column.readFields(input);
     columns.add(column);
   }
   Map<String, byte[][]> guidePosts = new HashMap<String, byte[][]>();
   int size = WritableUtils.readVInt(input);
   for (int i = 0; i < size; i++) {
     String key = WritableUtils.readString(input);
     int valueSize = WritableUtils.readVInt(input);
     byte[][] value = new byte[valueSize][];
     for (int j = 0; j < valueSize; j++) {
       value[j] = Bytes.readByteArray(input);
     }
     guidePosts.put(key, value);
   }
   PTableStats stats = new PTableStatsImpl(guidePosts);
   init(tableName, tableType, timeStamp, sequenceNumber, pkName, columns, stats);
 }
Exemplo n.º 3
0
  public static QuantileDigest deserialize(DataInput input) {
    try {
      double maxError = input.readDouble();
      double alpha = input.readDouble();

      QuantileDigest result = new QuantileDigest(maxError, alpha);

      result.landmarkInSeconds = input.readLong();
      result.min = input.readLong();
      result.max = input.readLong();
      result.totalNodeCount = input.readInt();

      Deque<Node> stack = new ArrayDeque<>();
      for (int i = 0; i < result.totalNodeCount; i++) {
        int flags = input.readByte();

        Node node = deserializeNode(input);

        if ((flags & Flags.HAS_RIGHT) != 0) {
          node.right = stack.pop();
        }

        if ((flags & Flags.HAS_LEFT) != 0) {
          node.left = stack.pop();
        }

        stack.push(node);
        result.weightedCount += node.weightedCount;
        if (node.weightedCount >= ZERO_WEIGHT_THRESHOLD) {
          result.nonZeroNodeCount++;
        }
      }

      if (!stack.isEmpty()) {
        Preconditions.checkArgument(
            stack.size() == 1, "Tree is corrupted. Expected a single root node");
        result.root = stack.pop();
      }

      return result;
    } catch (IOException e) {
      throw Throwables.propagate(e);
    }
  }