// Meta - a "minimal" approach to adding meta-level to Java objects
//
//   v2 - now much easier and more performant

// OK you can read the rants here: #1031838 so right now I will stick to
// describing the changes.

sclass Meta_v2 implements IMeta_v2 {

  // So what's new in Meta v2?
  
  // We still have one field - but now it's definitely a map (a map
  // can hold anything, so...)
  // And we make this field, or rather, the object contained in it,
  // "speak" for itself. It's just a map that you can use like any
  // other one. It may shape-shift during its operation, meaning it
  // can even change its base class to accomodate for special cases.
  
  // This, however, necessitates that the object can exchange itself
  // for another one at any point. Thus the regular Map interface
  // will not cut it.
  
  volatile O meta;
  
  // The meta field is not transient, thus by default it will be
  // persisted like anything else unless you customize your object
  // to suppress or modulate this.
  
  // ...and the interface methods
  
  public void _setMeta(O meta) { this.meta = meta; }
  public O _getMeta() { ret meta; }
  
  // That was layer 1...
  // ...and here is the convenience stuff - just use the meta field like a regular map.
  
  void metaSet aka metaPut(O key, O value) { metaMapPut(this, key, value); }
  O metaGet(O key) { ret metaMapGet(this, key); }
}