BlockListAsLongs.java 文件源码

public static BlockListAsLongs readFrom(InputStream is) throws IOException {
  CodedInputStream cis = CodedInputStream.newInstance(is);
  int numBlocks = -1;
  ByteString blocksBuf = null;
  while (!cis.isAtEnd()) {
    int tag = cis.readTag();
    int field = WireFormat.getTagFieldNumber(tag);
    switch(field) {
      case 0:
        break;
      case 1:
        numBlocks = (int)cis.readInt32();
        break;
      case 2:
        blocksBuf = cis.readBytes();
        break;
      default:
        cis.skipField(tag);
        break;
    }
  }
  if (numBlocks != -1 && blocksBuf != null) {
    return decodeBuffer(numBlocks, blocksBuf);
  }
  return null;
}