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      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 
     17 package android.content;
     18 
     19 import android.annotation.UnsupportedAppUsage;
     20 import android.content.pm.RegisteredServicesCache;
     21 import android.content.pm.XmlSerializerAndParser;
     22 import android.content.res.Resources;
     23 import android.content.res.TypedArray;
     24 import android.text.TextUtils;
     25 import android.util.ArrayMap;
     26 import android.util.AttributeSet;
     27 import android.util.SparseArray;
     28 
     29 import com.android.internal.annotations.GuardedBy;
     30 
     31 import org.xmlpull.v1.XmlPullParser;
     32 import org.xmlpull.v1.XmlSerializer;
     33 import org.xmlpull.v1.XmlPullParserException;
     34 
     35 import java.io.IOException;
     36 import java.util.ArrayList;
     37 import java.util.Collection;
     38 
     39 /**
     40  * A cache of services that export the {@link android.content.ISyncAdapter} interface.
     41  * @hide
     42  */
     43 public class SyncAdaptersCache extends RegisteredServicesCache<SyncAdapterType> {
     44     private static final String TAG = "Account";
     45 
     46     private static final String SERVICE_INTERFACE = "android.content.SyncAdapter";
     47     private static final String SERVICE_META_DATA = "android.content.SyncAdapter";
     48     private static final String ATTRIBUTES_NAME = "sync-adapter";
     49     private static final MySerializer sSerializer = new MySerializer();
     50 
     51     @GuardedBy("mServicesLock")
     52     private SparseArray<ArrayMap<String,String[]>> mAuthorityToSyncAdapters
     53             = new SparseArray<>();
     54 
     55     @UnsupportedAppUsage
     56     public SyncAdaptersCache(Context context) {
     57         super(context, SERVICE_INTERFACE, SERVICE_META_DATA, ATTRIBUTES_NAME, sSerializer);
     58     }
     59 
     60     public SyncAdapterType parseServiceAttributes(Resources res,
     61             String packageName, AttributeSet attrs) {
     62         TypedArray sa = res.obtainAttributes(attrs,
     63                 com.android.internal.R.styleable.SyncAdapter);
     64         try {
     65             final String authority =
     66                     sa.getString(com.android.internal.R.styleable.SyncAdapter_contentAuthority);
     67             final String accountType =
     68                     sa.getString(com.android.internal.R.styleable.SyncAdapter_accountType);
     69             if (TextUtils.isEmpty(authority) || TextUtils.isEmpty(accountType)) {
     70                 return null;
     71             }
     72             final boolean userVisible =
     73                     sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_userVisible, true);
     74             final boolean supportsUploading =
     75                     sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_supportsUploading,
     76                             true);
     77             final boolean isAlwaysSyncable =
     78                     sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_isAlwaysSyncable,
     79                             false);
     80             final boolean allowParallelSyncs =
     81                     sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_allowParallelSyncs,
     82                             false);
     83             final String settingsActivity =
     84                     sa.getString(com.android.internal.R.styleable
     85                             .SyncAdapter_settingsActivity);
     86             return new SyncAdapterType(authority, accountType, userVisible, supportsUploading,
     87                     isAlwaysSyncable, allowParallelSyncs, settingsActivity, packageName);
     88         } finally {
     89             sa.recycle();
     90         }
     91     }
     92 
     93     @Override
     94     protected void onServicesChangedLocked(int userId) {
     95         synchronized (mServicesLock) {
     96             ArrayMap<String,String[]> adapterMap = mAuthorityToSyncAdapters.get(userId);
     97             if (adapterMap != null) {
     98                 adapterMap.clear();
     99             }
    100         }
    101 
    102         super.onServicesChangedLocked(userId);
    103     }
    104 
    105     public String[] getSyncAdapterPackagesForAuthority(String authority, int userId) {
    106         synchronized (mServicesLock) {
    107             ArrayMap<String,String[]> adapterMap = mAuthorityToSyncAdapters.get(userId);
    108             if (adapterMap == null) {
    109                 adapterMap = new ArrayMap<>();
    110                 mAuthorityToSyncAdapters.put(userId, adapterMap);
    111             }
    112             // If the mapping exists, return it
    113             if (adapterMap.containsKey(authority)) {
    114                 return adapterMap.get(authority);
    115             }
    116             // Create the mapping and cache it
    117             String[] syncAdapterPackages;
    118             final Collection<RegisteredServicesCache.ServiceInfo<SyncAdapterType>> serviceInfos;
    119             serviceInfos = getAllServices(userId);
    120             ArrayList<String> packages = new ArrayList<>();
    121             for (RegisteredServicesCache.ServiceInfo<SyncAdapterType> serviceInfo : serviceInfos) {
    122                 if (authority.equals(serviceInfo.type.authority)
    123                         && serviceInfo.componentName != null) {
    124                     packages.add(serviceInfo.componentName.getPackageName());
    125                 }
    126             }
    127             syncAdapterPackages = new String[packages.size()];
    128             packages.toArray(syncAdapterPackages);
    129             adapterMap.put(authority, syncAdapterPackages);
    130 
    131             return syncAdapterPackages;
    132         }
    133     }
    134 
    135     @Override
    136     protected void onUserRemoved(int userId) {
    137         synchronized (mServicesLock) {
    138             mAuthorityToSyncAdapters.remove(userId);
    139         }
    140 
    141         super.onUserRemoved(userId);
    142     }
    143 
    144     static class MySerializer implements XmlSerializerAndParser<SyncAdapterType> {
    145         public void writeAsXml(SyncAdapterType item, XmlSerializer out) throws IOException {
    146             out.attribute(null, "authority", item.authority);
    147             out.attribute(null, "accountType", item.accountType);
    148         }
    149 
    150         public SyncAdapterType createFromXml(XmlPullParser parser)
    151                 throws IOException, XmlPullParserException {
    152             final String authority = parser.getAttributeValue(null, "authority");
    153             final String accountType = parser.getAttributeValue(null, "accountType");
    154             return SyncAdapterType.newKey(authority, accountType);
    155         }
    156     }
    157 }
    158