@Override
  public PropertySchema getSchema(String schemaName) {
    switch(schemaName) {
      case CLUSTER_PREFIX: return CLUSTER_SCHEMA;
      case DATABASE_PREFIX: return DATABASE_SCHEMA;
      case TABLE_PREFIX: return TABLE_SCHEMA;
      default: return null;
    }
  }
The property map factory.
@param schemaName the map type (cluster, database, table)
@return a property schema instance
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/properties/HMSPropertyManager.java