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.compat.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.XmlPullParserException;
33 import org.xmlpull.v1.XmlSerializer;
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
SyncAdaptersCache(Context context)56     public SyncAdaptersCache(Context context) {
57         super(context, SERVICE_INTERFACE, SERVICE_META_DATA, ATTRIBUTES_NAME, sSerializer);
58     }
59 
parseServiceAttributes(Resources res, String packageName, AttributeSet attrs)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
onServicesChangedLocked(int userId)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 
getSyncAdapterPackagesForAuthority(String authority, int userId)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
onUserRemoved(int userId)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> {
writeAsXml(SyncAdapterType item, XmlSerializer out)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 
createFromXml(XmlPullParser parser)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