Method parseFromColumn

src/meta/TSMeta.java:404–424

Parses a TSMeta object from the given column, optionally loading the UIDMeta objects @param tsdb The TSDB to use for storage access @param column The KeyValue column to parse @param load_uidmetas Whether or not UIDmeta objects should be loaded @return A TSMeta if parsed successfully @throws NoSuchUn

(final TSDB tsdb, 
      final KeyValue column, final boolean load_uidmetas)

   * @throws JSONException if the data was corrupted
   */
  public static Deferred<TSMeta> parseFromColumn(final TSDB tsdb, 
      final KeyValue column, final boolean load_uidmetas) {
    if (column.value() == null || column.value().length < 1) {
      throw new IllegalArgumentException("Empty column value");
    }

    final TSMeta parsed_meta = JSON.parseToObject(column.value(), TSMeta.class);
    
    // fix in case the tsuid is missing
    if (parsed_meta.tsuid == null || parsed_meta.tsuid.isEmpty()) {
      parsed_meta.tsuid = UniqueId.uidToString(column.key());
    }

    Deferred<TSMeta> meta = getFromStorage(tsdb, UniqueId.stringToUid(parsed_meta.tsuid));
    
    if (!load_uidmetas) {
      return meta;
    }
    
    return meta.addCallbackDeferring(new LoadUIDs(tsdb, parsed_meta.tsuid));
  }
  
  /**
   * Determines if an entry exists in storage or not.