SpnOverride.java revision 8e4af4a6c1d5f697b9c548e827e047248c12d788 
1/*
2 * Copyright (C) 2009 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
17package com.android.internal.telephony.uicc;
18
19import java.io.File;
20import java.io.FileNotFoundException;
21import java.io.FileReader;
22import java.io.IOException;
23import java.util.HashMap;
24
25import org.xmlpull.v1.XmlPullParser;
26import org.xmlpull.v1.XmlPullParserException;
27
28import android.os.Environment;
29import android.telephony.Rlog;
30import android.util.Xml;
31
32import com.android.internal.util.XmlUtils;
33
34public class SpnOverride {
35    private HashMap<String, String> mCarrierSpnMap;
36
37
38    static final String LOG_TAG = "SpnOverride";
39    static final String PARTNER_SPN_OVERRIDE_PATH ="etc/spn-conf.xml";
40    static final String OEM_SPN_OVERRIDE_PATH = "telephony/spn-conf.xml";
41
42    SpnOverride () {
43        mCarrierSpnMap = new HashMap<String, String>();
44        loadSpnOverrides();
45    }
46
47    boolean containsCarrier(String carrier) {
48        return mCarrierSpnMap.containsKey(carrier);
49    }
50
51    String getSpn(String carrier) {
52        return mCarrierSpnMap.get(carrier);
53    }
54
55    private void loadSpnOverrides() {
56        FileReader spnReader;
57
58        File spnFile = new File(Environment.getRootDirectory(),
59                PARTNER_SPN_OVERRIDE_PATH);
60        File oemSpnFile = new File(Environment.getOemDirectory(),
61                OEM_SPN_OVERRIDE_PATH);
62
63        if (oemSpnFile.exists()) {
64            // OEM image exist SPN xml, get the timestamp from OEM & System image for comparison.
65            long oemSpnTime = oemSpnFile.lastModified();
66            long sysSpnTime = spnFile.lastModified();
67            Rlog.d(LOG_TAG, "SPN Timestamp: oemTime = " + oemSpnTime + " sysTime = " + sysSpnTime);
68
69            // To get the newer version of SPN from OEM image
70            if (oemSpnTime > sysSpnTime) {
71                Rlog.d(LOG_TAG, "SPN in OEM image is newer than System image");
72                spnFile = oemSpnFile;
73            }
74        } else {
75            // No SPN in OEM image, so load it from system image.
76            Rlog.d(LOG_TAG, "No SPN in OEM image = " + oemSpnFile.getPath() +
77                " Load SPN from system image");
78        }
79
80        try {
81            spnReader = new FileReader(spnFile);
82        } catch (FileNotFoundException e) {
83            Rlog.w(LOG_TAG, "Can not open " + spnFile.getAbsolutePath());
84            return;
85        }
86
87        try {
88            XmlPullParser parser = Xml.newPullParser();
89            parser.setInput(spnReader);
90
91            XmlUtils.beginDocument(parser, "spnOverrides");
92
93            while (true) {
94                XmlUtils.nextElement(parser);
95
96                String name = parser.getName();
97                if (!"spnOverride".equals(name)) {
98                    break;
99                }
100
101                String numeric = parser.getAttributeValue(null, "numeric");
102                String data    = parser.getAttributeValue(null, "spn");
103
104                mCarrierSpnMap.put(numeric, data);
105            }
106            spnReader.close();
107        } catch (XmlPullParserException e) {
108            Rlog.w(LOG_TAG, "Exception in spn-conf parser " + e);
109        } catch (IOException e) {
110            Rlog.w(LOG_TAG, "Exception in spn-conf parser " + e);
111        }
112    }
113
114}
115