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