content: /*
   * Copyright (C) 2009 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.content;
  
  import android.annotation.UnsupportedAppUsage;
  import android.content.pm.RegisteredServicesCache;
  import android.content.pm.XmlSerializerAndParser;
  import android.content.res.Resources;
  import android.content.res.TypedArray;
  import android.text.TextUtils;
  import android.util.ArrayMap;
  import android.util.AttributeSet;
  import android.util.SparseArray;
  
  import com.android.internal.annotations.GuardedBy;
  
  import org.xmlpull.v1.XmlPullParser;
  import org.xmlpull.v1.XmlSerializer;
  import org.xmlpull.v1.XmlPullParserException;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collection;
  
  /**
   * A cache of services that export the {@link android.content.ISyncAdapter} interface.
   * @hide
   */
  public class SyncAdaptersCache extends RegisteredServicesCache<SyncAdapterType> {
      private static final String TAG = "Account";
  
      private static final String SERVICE_INTERFACE = "android.content.SyncAdapter";
      private static final String SERVICE_META_DATA = "android.content.SyncAdapter";
      private static final String ATTRIBUTES_NAME = "sync-adapter";
      private static final MySerializer sSerializer = new MySerializer();
  
      @GuardedBy("mServicesLock")
      private SparseArray<ArrayMap<String,String[]>> mAuthorityToSyncAdapters
              = new SparseArray<>();
  
      @UnsupportedAppUsage
      public SyncAdaptersCache(Context context) {
          super(context, SERVICE_INTERFACE, SERVICE_META_DATA, ATTRIBUTES_NAME, sSerializer);
      }
  
      public SyncAdapterType parseServiceAttributes(Resources res,
              String packageName, AttributeSet attrs) {
          TypedArray sa = res.obtainAttributes(attrs,
                  com.android.internal.R.styleable.SyncAdapter);
          try {
              final String authority =
                      sa.getString(com.android.internal.R.styleable.SyncAdapter_contentAuthority);
              final String accountType =
                      sa.getString(com.android.internal.R.styleable.SyncAdapter_accountType);
              if (TextUtils.isEmpty(authority) || TextUtils.isEmpty(accountType)) {
                  return null;
              }
              final boolean userVisible =
                      sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_userVisible, true);
              final boolean supportsUploading =
                      sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_supportsUploading,
                              true);
              final boolean isAlwaysSyncable =
                      sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_isAlwaysSyncable,
                              false);
              final boolean allowParallelSyncs =
                      sa.getBoolean(com.android.internal.R.styleable.SyncAdapter_allowParallelSyncs,
                              false);
              final String settingsActivity =
                      sa.getString(com.android.internal.R.styleable
                              .SyncAdapter_settingsActivity);
              return new SyncAdapterType(authority, accountType, userVisible, supportsUploading,
                      isAlwaysSyncable, allowParallelSyncs, settingsActivity, packageName);
          } finally {
              sa.recycle();
          }
      }
  
      @Override
      protected void onServicesChangedLocked(int userId) {
          synchronized (mServicesLock) {
              ArrayMap<String,String[]> adapterMap = mAuthorityToSyncAdapters.get(userId);
              if (adapterMap != null) {
                  adapterMap.clear();
              }
          }
  
          super.onServicesChangedLocked(userId);
      }
  
      public String[] getSyncAdapterPackagesForAuthority(String authority, int userId) {
          synchronized (mServicesLock) {
              ArrayMap<String,String[]> adapterMap = mAuthorityToSyncAdapters.get(userId);
              if (adapterMap == null) {
                  adapterMap = new ArrayMap<>();
                  mAuthorityToSyncAdapters.put(userId, adapterMap);
              }
              // If the mapping exists, return it
              if (adapterMap.containsKey(authority)) {
                  return adapterMap.get(authority);
              }
              // Create the mapping and cache it
              String[] syncAdapterPackages;
              final Collection<RegisteredServicesCache.ServiceInfo<SyncAdapterType>> serviceInfos;
              serviceInfos = getAllServices(userId);
              ArrayList<String> packages = new ArrayList<>();
              for (RegisteredServicesCache.ServiceInfo<SyncAdapterType> serviceInfo : serviceInfos) {
                  if (authority.equals(serviceInfo.type.authority)
                          && serviceInfo.componentName != null) {
                      packages.add(serviceInfo.componentName.getPackageName());
                  }
              }
              syncAdapterPackages = new String[packages.size()];
              packages.toArray(syncAdapterPackages);
              adapterMap.put(authority, syncAdapterPackages);
  
              return syncAdapterPackages;
          }
      }
  
      @Override
      protected void onUserRemoved(int userId) {
          synchronized (mServicesLock) {
              mAuthorityToSyncAdapters.remove(userId);
          }
  
          super.onUserRemoved(userId);
      }
  
      static class MySerializer implements XmlSerializerAndParser<SyncAdapterType> {
          public void writeAsXml(SyncAdapterType item, XmlSerializer out) throws IOException {
              out.attribute(null, "authority", item.authority);
              out.attribute(null, "accountType", item.accountType);
          }
  
          public SyncAdapterType createFromXml(XmlPullParser parser)
                  throws IOException, XmlPullParserException {
              final String authority = parser.getAttributeValue(null, "authority");
              final String accountType = parser.getAttributeValue(null, "accountType");
              return SyncAdapterType.newKey(authority, accountType);
          }
      }
  }
  