1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.server.wifi.hotspot2.omadm;
18 
19 import android.util.Log;
20 
21 import com.android.server.wifi.hotspot2.SystemInfo;
22 
23 import org.w3c.dom.Document;
24 import org.w3c.dom.Element;
25 
26 import javax.xml.parsers.ParserConfigurationException;
27 
28 import android.annotation.NonNull;
29 
30 /**
31  * Provides serialization API for DevInfo MO (Management Object).
32  *
33  * Devinfo---|- DevId
34  *           |- Man
35  *           |- Mod
36  *           |- Dmv
37  *           |- Lang
38  */
39 public class DevInfoMo {
40     public static final String TAG = "DevInfoMo";
41     public static final String URN = "urn:oma:mo:oma-dm-devinfo:1.0";
42 
43     private static final String MO_NAME = "DevInfo";
44     private static final String TAG_DEVID = "DevID";
45     private static final String TAG_MANUFACTURE = "Man";
46     private static final String TAG_MODEL = "Mod";
47     private static final String TAG_DM_VERSION = "DmV";
48     private static final String TAG_LANGUAGE = "Lang";
49 
50     /**
51      * Make a format of XML based on the DDF(Data Definition Format) of DevInfo MO.
52      *
53      * @return the XML that has format of OMA DM DevInfo Management Object, <code>null</code> in
54      * case of any failure.
55      */
serializeToXml(@onNull SystemInfo systemInfo)56     public static String serializeToXml(@NonNull SystemInfo systemInfo) {
57         MoSerializer moSerializer;
58         try {
59             moSerializer = new MoSerializer();
60         } catch (ParserConfigurationException e) {
61             Log.e(TAG, "failed to create the MoSerializer: " + e);
62             return null;
63         }
64         // Create the XML document for DevInfoMo
65         Document doc = moSerializer.createNewDocument();
66         Element rootElement = moSerializer.createMgmtTree(doc);
67         rootElement.appendChild(moSerializer.writeVersion(doc));
68         Element moNode = moSerializer.createNode(doc, MO_NAME);
69         moNode.appendChild(moSerializer.createNodeForUrn(doc, URN));
70         rootElement.appendChild(moNode);
71         rootElement.appendChild(
72                 moSerializer.createNodeForValue(doc, TAG_DEVID, systemInfo.getDeviceId()));
73 
74         rootElement.appendChild(moSerializer.createNodeForValue(doc, TAG_MANUFACTURE,
75                 systemInfo.getDeviceManufacturer()));
76         rootElement.appendChild(
77                 moSerializer.createNodeForValue(doc, TAG_MODEL, systemInfo.getDeviceModel()));
78         rootElement.appendChild(
79                 moSerializer.createNodeForValue(doc, TAG_DM_VERSION, MoSerializer.DM_VERSION));
80         rootElement.appendChild(
81                 moSerializer.createNodeForValue(doc, TAG_LANGUAGE, systemInfo.getLanguage()));
82 
83         return moSerializer.serialize(doc);
84     }
85 }