// ---- Level for filters ----
public static enum FilterLevels {
ENGINE("engine"), HOST("host"), CONTEXT("context"), WRAPPER("wrapper");
private final String readableName;

private FilterLevels(String readableName) {
this.readableName = readableName;
}

/*

• (non-Javadoc)
• @see java.lang.Enum#toString() */
  @Override
  public String toString() { return this.readableName;
  }
  }