private static ByteBuffer appendRecursive()

in watchman/java/src/com/facebook/watchman/bser/BserSerializer.java [102:158]
56 lines of code
16 McCabe index (conditional complexity)

  private static ByteBuffer appendRecursive(
      ByteBuffer buffer,
      Object value,
      CharsetEncoder utf8Encoder) throws IOException {
    if (value instanceof Boolean) {
      buffer = increaseBufferCapacityIfNeeded(buffer, 1);
      buffer.put(((Boolean) value) ? BSER_TRUE : BSER_FALSE);
    } else if (value == null) {
      buffer = increaseBufferCapacityIfNeeded(buffer, 1);
      buffer.put(BSER_NULL);
    } else if (value instanceof String) {
      buffer = appendString(buffer, (String) value, utf8Encoder);
    } else if (value instanceof Double || value instanceof Float) {
      buffer = increaseBufferCapacityIfNeeded(buffer, 9);
      buffer.put(BSER_REAL);
      buffer.putDouble((Double) value);
    } else if (value instanceof Long) {
      buffer = appendLong(buffer, (Long) value);
    } else if (value instanceof Integer) {
      buffer = appendLong(buffer, (Integer) value);
    } else if (value instanceof Short) {
      buffer = appendLong(buffer, (Short) value);
    } else if (value instanceof Byte) {
      buffer = appendLong(buffer, (Byte) value);
    } else if (value instanceof Map<?, ?>) {
      Map<Object, Object> map = (Map<Object, Object>) value;
      int mapLen = map.size();
      BserIntegralEncodedSize encodedSize = getEncodedSize(mapLen);
      buffer = increaseBufferCapacityIfNeeded(buffer, 2 + encodedSize.size);
      buffer.put(BSER_OBJECT);
      buffer = appendLongWithSize(buffer, mapLen, encodedSize);
      for (Map.Entry<Object, Object> entry : map.entrySet()) {
        if (!(entry.getKey() instanceof String)) {
          throw new IOException(
              String.format(
                  "Unrecognized map key type %s, expected string",
                  entry.getKey().getClass()));
        }
        buffer = appendString(buffer, (String) entry.getKey(), utf8Encoder);
        buffer = appendRecursive(buffer, entry.getValue(), utf8Encoder);
      }
    } else if (value instanceof List<?>) {
      List<Object> list = (List<Object>) value;
      int listLen = list.size();
      BserIntegralEncodedSize encodedSize = getEncodedSize(listLen);
      buffer = increaseBufferCapacityIfNeeded(buffer, 2 + encodedSize.size);
      buffer.put(BSER_ARRAY);
      buffer = appendLongWithSize(buffer, listLen, encodedSize);
      for (Object obj : list) {
        buffer = appendRecursive(buffer, obj, utf8Encoder);
      }
    } else {
      throw new RuntimeException("Cannot encode object: " + value);
    }

    return buffer;
  }