/*
    * Copyright (C) 2013 4th Line GmbH, Switzerland
    *
    * The contents of this file are subject to the terms of either the GNU
    * Lesser General Public License Version 2 or later ("LGPL") or the
    * Common Development and Distribution License Version 1 or later
    * ("CDDL") (collectively, the "License"). You may not use this file
    * except in compliance with the License. See LICENSE.txt for more
    * information.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   */
  
  package org.fourthline.cling.model.message.header;
  
  import org.fourthline.cling.model.types.UDN;
  
  /**
   * @author Christian Bauer
   */
  public class USNRootDeviceHeader extends UpnpHeader<UDN> {
  
      public static final String ROOT_DEVICE_SUFFIX = "::upnp:rootdevice";
  
      public USNRootDeviceHeader() {
      }
  
      public USNRootDeviceHeader(UDN udn) {
          setValue(udn);
      }
  
      public void setString(String s) throws InvalidHeaderException {
          if (!s.startsWith(UDN.PREFIX) || !s.endsWith(ROOT_DEVICE_SUFFIX)) {
              throw new InvalidHeaderException(
                      "Invalid root device USN header value, must start with '" +
                              UDN.PREFIX + "' and end with '" +
                              ROOT_DEVICE_SUFFIX + "' but is '" + s + "'"
              );
          }
          UDN udn = new UDN(s.substring(UDN.PREFIX.length(), s.length() - ROOT_DEVICE_SUFFIX.length()));
          setValue(udn);
      }
  
      public String getString() {
          return getValue().toString() + ROOT_DEVICE_SUFFIX;
      }
  
  }