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      1 /*
      2  * Copyright (C) 2015 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 android.support.v7.mms;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.content.res.XmlResourceParser;
     22 import android.os.Bundle;
     23 import android.util.Log;
     24 import android.util.SparseArray;
     25 
     26 import com.android.messaging.R;
     27 
     28 /**
     29  * The default implementation of loader for carrier config values
     30  */
     31 class DefaultCarrierConfigValuesLoader implements CarrierConfigValuesLoader {
     32     /*
     33      * Key types
     34      */
     35     public static final String KEY_TYPE_INT = "int";
     36     public static final String KEY_TYPE_BOOL = "bool";
     37     public static final String KEY_TYPE_STRING = "string";
     38 
     39     private final Context mContext;
     40 
     41     // Cached values for subIds
     42     private final SparseArray<Bundle> mValuesCache;
     43 
     44     DefaultCarrierConfigValuesLoader(final Context context) {
     45         mContext = context;
     46         mValuesCache = new SparseArray<>();
     47     }
     48 
     49     @Override
     50     public Bundle get(int subId) {
     51         subId = Utils.getEffectiveSubscriptionId(subId);
     52         Bundle values;
     53         boolean didLoad = false;
     54         synchronized (this) {
     55             values = mValuesCache.get(subId);
     56             if (values == null) {
     57                 values = new Bundle();
     58                 mValuesCache.put(subId, values);
     59                 loadLocked(subId, values);
     60                 didLoad = true;
     61             }
     62         }
     63         if (didLoad) {
     64             Log.i(MmsService.TAG, "Carrier configs loaded: " + values);
     65         }
     66         return values;
     67     }
     68 
     69     private void loadLocked(final int subId, final Bundle values) {
     70         // For K and earlier, load from resources
     71         loadFromResources(subId, values);
     72         if (Utils.hasMmsApi()) {
     73             // For L and later, also load from system MMS service
     74             loadFromSystem(subId, values);
     75         }
     76     }
     77 
     78     /**
     79      * Load from system, using MMS API
     80      *
     81      * @param subId which SIM to load for
     82      * @param values the result to add to
     83      */
     84     private static void loadFromSystem(final int subId, final Bundle values) {
     85         try {
     86             final Bundle systemValues = Utils.getSmsManager(subId).getCarrierConfigValues();
     87             if (systemValues != null) {
     88                 values.putAll(systemValues);
     89             }
     90         } catch (final Exception e) {
     91             Log.w(MmsService.TAG, "Calling system getCarrierConfigValues exception", e);
     92         }
     93     }
     94 
     95     private void loadFromResources(final int subId, final Bundle values) {
     96         // Get a subscription-dependent context for loading the mms_config.xml
     97         final Context subContext = Utils.getSubDepContext(mContext, subId);
     98         XmlResourceParser xml = null;
     99         try {
    100             xml = subContext.getResources().getXml(R.xml.mms_config);
    101             new CarrierConfigXmlParser(xml, new CarrierConfigXmlParser.KeyValueProcessor() {
    102                 @Override
    103                 public void process(String type, String key, String value) {
    104                     try {
    105                         if (KEY_TYPE_INT.equals(type)) {
    106                             values.putInt(key, Integer.parseInt(value));
    107                         } else if (KEY_TYPE_BOOL.equals(type)) {
    108                             values.putBoolean(key, Boolean.parseBoolean(value));
    109                         } else if (KEY_TYPE_STRING.equals(type)) {
    110                             values.putString(key, value);
    111                         }
    112                     } catch (final NumberFormatException e) {
    113                         Log.w(MmsService.TAG, "Load carrier value from resources: "
    114                                 + "invalid " + key + "," + value + "," + type);
    115                     }
    116                 }
    117             }).parse();
    118         } catch (final Resources.NotFoundException e) {
    119             Log.w(MmsService.TAG, "Can not get mms_config.xml");
    120         } finally {
    121             if (xml != null) {
    122                 xml.close();
    123             }
    124         }
    125     }
    126 }
    127