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
17package com.android.server.accounts;
18
19import android.accounts.AccountManager;
20import android.accounts.AuthenticatorDescription;
21import android.accounts.IAccountAuthenticator;
22import android.content.Context;
23import android.content.pm.PackageManager;
24import android.content.pm.RegisteredServicesCache;
25import android.content.pm.XmlSerializerAndParser;
26import android.content.res.Resources;
27import android.content.res.TypedArray;
28import android.text.TextUtils;
29import android.util.AttributeSet;
30
31import org.xmlpull.v1.XmlPullParser;
32import org.xmlpull.v1.XmlPullParserException;
33import org.xmlpull.v1.XmlSerializer;
34
35import 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