Reading to ByteBuffer is broken in ParquetFooterInputFromCache

  public int read(ByteBuffer bb) throws IOException {
    // Simple implementation for now - currently Parquet uses heap buffers.
    int result = -1;
    if (bb.hasArray()) {
      result = readInternal(bb.array(), bb.arrayOffset(), result);  // The readInternal is called with result=-1
      if (result > 0) {
        bb.position(bb.position() + result);
      }
    } else {
      byte[] b = new byte[bb.remaining()];
      result = readInternal(b, 0, result);     // The readInternal is called with result=-1
      bb.put(b, 0, result);
    }
    return result;
  }

  public int readInternal(byte[] b, int offset, int len) {
    if (position >= length) return -1;
    int argPos = offset, argEnd = offset + len;      // Here argEnd will be -1
    while (argPos < argEnd) {             // This condition will never be true, since argEnd=-1
      if (bufferIx == cacheData.length) return (argPos - offset);
      ByteBuffer data = cacheData[bufferIx].getByteBufferDup();
      int toConsume = Math.min(argEnd - argPos, data.remaining() - bufferPos);
      data.position(data.position() + bufferPos);
      data.get(b, argPos, toConsume);
      if (data.remaining() == 0) {
        ++bufferIx;
        bufferPos = 0;
      } else {
        bufferPos += toConsume;
      }
      argPos += toConsume;
    }
    return len;
  }