Bucket and Key extraction from a single, composite-key-like object

gistfile1.java

    Object bucket = null;
    Object key = null;
    if (obj instanceof Map) {
      Map m = (Map) obj;
      bucket = m.get("bucket");
      key = m.get("key");
    } else {
      // Override from Annotation?
      KeyValueStoreMetaData meta = obj.getClass().getAnnotation(KeyValueStoreMetaData.class);
      if (null != meta && null != meta.family()) {
        bucket = meta.family();
      }
      String s = obj.toString();
      if (s.contains("@")) {
        // This is likely the result of Object.toString()
        // which returns com.mypackage.MyObject@memaddr
        // Convert it using the conversion service if that's the case
        s = conversionService.convert(obj, String.class);
      }
      if (s.contains(":")) {
        String[] a = s.split(":");
        if (null == bucket) {
          bucket = a[0];
        }
        key = a[1];
      } else {
        key = s;
      }
      if (null == bucket) {
        // Default to the class name for the bucket
        bucket = (obj.getClass() == byte[].class ? "bytes" : obj.getClass().getName());
      }
    }
    return new String[]{(null != bucket ? bucket.toString() : null), (null != key ? key.toString() : null)};