protected String mapKey(String name) {
    StringBuilder strb = new StringBuilder(namespace);
    if (name != null && !name.isEmpty()){
      strb.append('.');
      strb.append(name);
    }
    return strb.toString();
  }
Compose a property map key from a property map name.
@param name the property map name, may be null or empty
@return the property map key used by the store
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/properties/PropertyManager.java