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