Home | History | Annotate | Download | only in accounts 
      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 com.android.server.accounts;
     18 
     19 import android.accounts.AccountManager;
     20 import android.accounts.AuthenticatorDescription;
     21 import android.accounts.IAccountAuthenticator;
     22 import android.content.Context;
     23 import android.content.pm.PackageManager;
     24 import android.content.pm.RegisteredServicesCache;
     25 import android.content.pm.XmlSerializerAndParser;
     26 import android.content.res.Resources;
     27 import android.content.res.TypedArray;
     28 import android.text.TextUtils;
     29 import android.util.AttributeSet;
     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 
     37 /**
     38  * A cache of services that export the {@link IAccountAuthenticator} interface. This cache
     39  * is built by interrogating the {@link PackageManager} and is updated as packages are added,
     40  * removed and changed. The authenticators are referred to by their account type and
     41  * are made available via the {@link RegisteredServicesCache#getServiceInfo} method.
     42  * @hide
     43  */
     44 /* package private */ class AccountAuthenticatorCache
     45         extends RegisteredServicesCache<AuthenticatorDescription>
     46         implements IAccountAuthenticatorCache {
     47     private static final String TAG = "Account";
     48     private static final MySerializer sSerializer = new MySerializer();
     49 
     50     public AccountAuthenticatorCache(Context context) {
     51         super(context, AccountManager.ACTION_AUTHENTICATOR_INTENT,
     52                 AccountManager.AUTHENTICATOR_META_DATA_NAME,
     53                 AccountManager.AUTHENTICATOR_ATTRIBUTES_NAME, sSerializer);
     54     }
     55 
     56     public AuthenticatorDescription parseServiceAttributes(Resources res,
     57             String packageName, AttributeSet attrs) {
     58         TypedArray sa = res.obtainAttributes(attrs,
     59                 com.android.internal.R.styleable.AccountAuthenticator);
     60         try {
     61             final String accountType =
     62                     sa.getString(com.android.internal.R.styleable.AccountAuthenticator_accountType);
     63             final int labelId = sa.getResourceId(
     64                     com.android.internal.R.styleable.AccountAuthenticator_label, 0);
     65             final int iconId = sa.getResourceId(
     66                     com.android.internal.R.styleable.AccountAuthenticator_icon, 0);
     67             final int smallIconId = sa.getResourceId(
     68                     com.android.internal.R.styleable.AccountAuthenticator_smallIcon, 0);
     69             final int prefId = sa.getResourceId(
     70                     com.android.internal.R.styleable.AccountAuthenticator_accountPreferences, 0);
     71             final boolean customTokens = sa.getBoolean(
     72                     com.android.internal.R.styleable.AccountAuthenticator_customTokens, false);
     73             if (TextUtils.isEmpty(accountType)) {
     74                 return null;
     75             }
     76             return new AuthenticatorDescription(accountType, packageName, labelId, iconId,
     77                     smallIconId, prefId, customTokens);
     78         } finally {
     79             sa.recycle();
     80         }
     81     }
     82 
     83     private static class MySerializer implements XmlSerializerAndParser<AuthenticatorDescription> {
     84         public void writeAsXml(AuthenticatorDescription item, XmlSerializer out)
     85                 throws IOException {
     86             out.attribute(null, "type", item.type);
     87         }
     88 
     89         public AuthenticatorDescription createFromXml(XmlPullParser parser)
     90                 throws IOException, XmlPullParserException {
     91             return AuthenticatorDescription.newKey(parser.getAttributeValue(null, "type"));
     92         }
     93     }
     94 }
     95