content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.android.server.wifi.hotspot2.omadm;
  
  import android.util.Log;
  
  import com.android.server.wifi.hotspot2.SystemInfo;
  
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  
  import javax.xml.parsers.ParserConfigurationException;
  
  import android.annotation.NonNull;
  
  /**
   * Provides serialization API for DevInfo MO (Management Object).
   *
   * Devinfo---|- DevId
   *           |- Man
   *           |- Mod
   *           |- Dmv
   *           |- Lang
   */
  public class DevInfoMo {
      public static final String TAG = "DevInfoMo";
      public static final String URN = "urn:oma:mo:oma-dm-devinfo:1.0";
  
      private static final String MO_NAME = "DevInfo";
      private static final String TAG_DEVID = "DevID";
      private static final String TAG_MANUFACTURE = "Man";
      private static final String TAG_MODEL = "Mod";
      private static final String TAG_DM_VERSION = "DmV";
      private static final String TAG_LANGUAGE = "Lang";
  
      /**
       * Make a format of XML based on the DDF(Data Definition Format) of DevInfo MO.
       *
       * @return the XML that has format of OMA DM DevInfo Management Object, <code>null</code> in
       * case of any failure.
       */
      public static String serializeToXml(@NonNull SystemInfo systemInfo) {
          MoSerializer moSerializer;
          try {
              moSerializer = new MoSerializer();
          } catch (ParserConfigurationException e) {
              Log.e(TAG, "failed to create the MoSerializer: " + e);
              return null;
          }
          // Create the XML document for DevInfoMo
          Document doc = moSerializer.createNewDocument();
          Element rootElement = moSerializer.createMgmtTree(doc);
          rootElement.appendChild(moSerializer.writeVersion(doc));
          Element moNode = moSerializer.createNode(doc, MO_NAME);
          moNode.appendChild(moSerializer.createNodeForUrn(doc, URN));
          rootElement.appendChild(moNode);
          rootElement.appendChild(
                  moSerializer.createNodeForValue(doc, TAG_DEVID, systemInfo.getDeviceId()));
  
          rootElement.appendChild(moSerializer.createNodeForValue(doc, TAG_MANUFACTURE,
                  systemInfo.getDeviceManufacturer()));
          rootElement.appendChild(
                  moSerializer.createNodeForValue(doc, TAG_MODEL, systemInfo.getDeviceModel()));
          rootElement.appendChild(
                  moSerializer.createNodeForValue(doc, TAG_DM_VERSION, MoSerializer.DM_VERSION));
          rootElement.appendChild(
                  moSerializer.createNodeForValue(doc, TAG_LANGUAGE, systemInfo.getLanguage()));
  
          return moSerializer.serialize(doc);
      }
  }