adding concept of features to accounts

9 files changed, 541 insertions, 112 deletions

diff --git a/core/java/android/accounts/AbstractAccountAuthenticator.java b/core/java/android/accounts/AbstractAccountAuthenticator.java
index 587279a..474755c 100644
--- a/core/java/android/accounts/AbstractAccountAuthenticator.java
+++ b/core/java/android/accounts/AbstractAccountAuthenticator.java
@@ -27,13 +27,13 @@ import android.os.RemoteException;
 public abstract class AbstractAccountAuthenticator {
     class Transport extends IAccountAuthenticator.Stub {
         public void addAccount(IAccountAuthenticatorResponse response, String accountType,
-                String authTokenType, Bundle options)
+                String authTokenType, String[] requiredFeatures, Bundle options)
                 throws RemoteException {
             final Bundle result;
             try {
                 result = AbstractAccountAuthenticator.this.addAccount(
                     new AccountAuthenticatorResponse(response),
-                        accountType, authTokenType, options);
+                        accountType, authTokenType, requiredFeatures, options);
             } catch (NetworkErrorException e) {
                 response.onError(Constants.ERROR_CODE_NETWORK_ERROR, e.getMessage());
                 return;
@@ -133,6 +133,25 @@ public abstract class AbstractAccountAuthenticator {
                 response.onResult(result);
             }
         }
+
+        public void hasFeatures(IAccountAuthenticatorResponse response,
+                Account account, String[] features) throws RemoteException {
+            final Bundle result;
+            try {
+                result = AbstractAccountAuthenticator.this.hasFeatures(
+                    new AccountAuthenticatorResponse(response), account, features);
+            } catch (UnsupportedOperationException e) {
+                response.onError(Constants.ERROR_CODE_UNSUPPORTED_OPERATION,
+                        "hasFeatures not supported");
+                return;
+            } catch (NetworkErrorException e) {
+                response.onError(Constants.ERROR_CODE_NETWORK_ERROR, e.getMessage());
+                return;
+            }
+            if (result != null) {
+                response.onResult(result);
+            }
+        }
     }
 
     Transport mTransport = new Transport();
@@ -160,7 +179,8 @@ public abstract class AbstractAccountAuthenticator {
     public abstract Bundle editProperties(AccountAuthenticatorResponse response,
             String accountType);
     public abstract Bundle addAccount(AccountAuthenticatorResponse response, String accountType,
-            String authTokenType, Bundle options) throws NetworkErrorException;
+            String authTokenType, String[] requiredFeatures, Bundle options)
+            throws NetworkErrorException;
     /* @deprecated */
     public abstract boolean confirmPassword(AccountAuthenticatorResponse response,
             Account account, String password) throws NetworkErrorException;
@@ -171,4 +191,6 @@ public abstract class AbstractAccountAuthenticator {
             throws NetworkErrorException;
     public abstract Bundle updateCredentials(AccountAuthenticatorResponse response,
             Account account, String authTokenType, Bundle loginOptions);
+    public abstract Bundle hasFeatures(AccountAuthenticatorResponse response,
+            Account account, String[] features) throws NetworkErrorException;
 }
diff --git a/core/java/android/accounts/AccountManager.java b/core/java/android/accounts/AccountManager.java
index c60f15d..007a490 100644
--- a/core/java/android/accounts/AccountManager.java
+++ b/core/java/android/accounts/AccountManager.java
@@ -23,6 +23,7 @@ import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.RemoteException;
+import android.os.Parcelable;
 
 import java.io.IOException;
 import java.util.concurrent.Callable;
@@ -33,7 +34,7 @@ import java.util.concurrent.TimeoutException;
 import java.util.concurrent.TimeUnit;
 
 /**
- * A class that helps with interactions with the {@link IAccountManager} interface. It provides
+ * A class that helps with interactions with the AccountManagerService. It provides
  * methods to allow for account, password, and authtoken management for all accounts on the
  * device. Some of these calls are implemented with the help of the corresponding
  * {@link IAccountAuthenticator} services. One accesses the {@link AccountManager} by calling:
@@ -48,6 +49,9 @@ public class AccountManager {
     private final Context mContext;
     private final IAccountManager mService;
 
+    /**
+     * @hide
+     */
     public AccountManager(Context context, IAccountManager service) {
         mContext = context;
         mService = service;
@@ -337,7 +341,7 @@ public class AccountManager {
                         false /* notifyOnAuthFailure */, true /* expectActivityLaunch */,
                         loginOptions);
             }
-        };
+        }.start();
     }
 
     public Future2 getAuthToken(
@@ -350,18 +354,19 @@ public class AccountManager {
                 mService.getAuthToken(mResponse, account, authTokenType,
                         notifyAuthFailure, false /* expectActivityLaunch */, null /* options */);
             }
-        };
+        }.start();
     }
 
     public Future2 addAccount(final String accountType,
-            final String authTokenType, final Bundle addAccountOptions,
+            final String authTokenType, final String[] requiredFeatures,
+            final Bundle addAccountOptions,
             final Activity activity, Future2Callback callback, Handler handler) {
         return new AmsTask(activity, handler, callback) {
             public void doWork() throws RemoteException {
                 mService.addAcount(mResponse, accountType, authTokenType,
-                        activity != null, addAccountOptions);
+                        requiredFeatures, activity != null, addAccountOptions);
             }
-        };
+        }.start();
     }
 
     /** @deprecated use {@link #confirmCredentials} instead */
@@ -374,6 +379,33 @@ public class AccountManager {
         };
     }
 
+    public Account[] blockingGetAccountsWithTypeAndFeatures(String type, String[] features)
+            throws AuthenticatorException, IOException, OperationCanceledException {
+        Future2 future = getAccountsWithTypeAndFeatures(type, features,
+                null /* callback */, null /* handler */);
+        Bundle result = future.getResult();
+        Parcelable[] accountsTemp = result.getParcelableArray(Constants.ACCOUNTS_KEY);
+        if (accountsTemp == null) {
+            throw new AuthenticatorException("accounts should not be null");
+        }
+        Account[] accounts = new Account[accountsTemp.length];
+        for (int i = 0; i < accountsTemp.length; i++) {
+            accounts[i] = (Account) accountsTemp[i];
+        }
+        return accounts;
+    }
+
+    public Future2 getAccountsWithTypeAndFeatures(
+            final String type, final String[] features,
+            Future2Callback callback, Handler handler) {
+        if (type == null) throw new IllegalArgumentException("type is null");
+        return new AmsTask(null /* activity */, handler, callback) {
+            public void doWork() throws RemoteException {
+                mService.getAccountsByTypeAndFeatures(mResponse, type, features);
+            }
+        }.start();
+    }
+
     public Future2 confirmCredentials(final Account account, final Activity activity,
             final Future2Callback callback,
             final Handler handler) {
@@ -381,7 +413,7 @@ public class AccountManager {
             public void doWork() throws RemoteException {
                 mService.confirmCredentials(mResponse, account, activity != null);
             }
-        };
+        }.start();
     }
 
     public Future2 updateCredentials(final Account account, final String authTokenType,
@@ -393,7 +425,7 @@ public class AccountManager {
                 mService.updateCredentials(mResponse, account, authTokenType, activity != null,
                         loginOptions);
             }
-        };
+        }.start();
     }
 
     public Future2 editProperties(final String accountType, final Activity activity,
@@ -403,7 +435,7 @@ public class AccountManager {
             public void doWork() throws RemoteException {
                 mService.editProperties(mResponse, accountType, activity != null);
             }
-        };
+        }.start();
     }
 
     private void ensureNotOnMainThread() {
@@ -502,11 +534,12 @@ public class AccountManager {
         }
     }
 
-    public abstract class AmsTask extends FutureTask<Bundle> implements Future2 {
+    private abstract class AmsTask extends FutureTask<Bundle> implements Future2 {
         final IAccountManagerResponse mResponse;
         final Handler mHandler;
         final Future2Callback mCallback;
         final Activity mActivity;
+        final Thread mThread;
         public AmsTask(Activity activity, Handler handler, Future2Callback callback) {
             super(new Callable<Bundle>() {
                 public Bundle call() throws Exception {
@@ -518,8 +551,7 @@ public class AccountManager {
             mCallback = callback;
             mActivity = activity;
             mResponse = new Response();
-
-            new Thread(new Runnable() {
+            mThread = new Thread(new Runnable() {
                 public void run() {
                     try {
                         doWork();
@@ -527,7 +559,12 @@ public class AccountManager {
                         // never happens
                     }
                 }
-            }).start();
+            }, "AmsTask");
+        }
+
+        public final Future2 start() {
+            mThread.start();
+            return this;
         }
 
         public abstract void doWork() throws RemoteException;
@@ -609,7 +646,7 @@ public class AccountManager {
 
     }
 
-    public abstract class AMSTaskBoolean extends FutureTask<Boolean> implements Future1<Boolean> {
+    private abstract class AMSTaskBoolean extends FutureTask<Boolean> implements Future1<Boolean> {
         final IAccountManagerResponse response;
         final Handler mHandler;
         final Future1Callback<Boolean> mCallback;
@@ -716,13 +753,159 @@ public class AccountManager {
         }
 
         if (code == Constants.ERROR_CODE_UNSUPPORTED_OPERATION) {
-            return new UnsupportedOperationException();
+            return new UnsupportedOperationException(message);
         }
 
         if (code == Constants.ERROR_CODE_INVALID_RESPONSE) {
-            return new AuthenticatorException("invalid response");
+            return new AuthenticatorException(message);
+        }
+
+        if (code == Constants.ERROR_CODE_BAD_ARGUMENTS) {
+            return new IllegalArgumentException(message);
+        }
+
+        return new AuthenticatorException(message);
+    }
+
+    private class GetAuthTokenByTypeAndFeaturesTask extends AmsTask implements Future2Callback {
+        GetAuthTokenByTypeAndFeaturesTask(final String accountType, final String authTokenType,
+                final String[] features, Activity activityForPrompting,
+                final Bundle addAccountOptions, final Bundle loginOptions,
+                Future2Callback callback, Handler handler) {
+            super(activityForPrompting, handler, callback);
+            if (accountType == null) throw new IllegalArgumentException("account type is null");
+            mAccountType = accountType;
+            mAuthTokenType = authTokenType;
+            mFeatures = features;
+            mAddAccountOptions = addAccountOptions;
+            mLoginOptions = loginOptions;
+            mMyCallback = this;
+        }
+        volatile Future2 mFuture = null;
+        final String mAccountType;
+        final String mAuthTokenType;
+        final String[] mFeatures;
+        final Bundle mAddAccountOptions;
+        final Bundle mLoginOptions;
+        final Future2Callback mMyCallback;
+
+        public void doWork() throws RemoteException {
+            getAccountsWithTypeAndFeatures(mAccountType, mFeatures, new Future2Callback() {
+                public void run(Future2 future) {
+                    Bundle getAccountsResult;
+                    try {
+                        getAccountsResult = future.getResult();
+                    } catch (OperationCanceledException e) {
+                        setException(e);
+                        return;
+                    } catch (IOException e) {
+                        setException(e);
+                        return;
+                    } catch (AuthenticatorException e) {
+                        setException(e);
+                        return;
+                    }
+
+                    Parcelable[] accounts =
+                            getAccountsResult.getParcelableArray(Constants.ACCOUNTS_KEY);
+                    if (accounts.length == 0) {
+                        if (mActivity != null) {
+                            // no accounts, add one now. pretend that the user directly
+                            // made this request
+                            mFuture = addAccount(mAccountType, mAuthTokenType, mFeatures,
+                                    mAddAccountOptions, mActivity, mMyCallback, mHandler);
+                        } else {
+                            // send result since we can't prompt to add an account
+                            Bundle result = new Bundle();
+                            result.putString(Constants.ACCOUNT_NAME_KEY, null);
+                            result.putString(Constants.ACCOUNT_TYPE_KEY, null);
+                            result.putString(Constants.AUTHTOKEN_KEY, null);
+                            try {
+                                mResponse.onResult(result);
+                            } catch (RemoteException e) {
+                                // this will never happen
+                            }
+                            // we are done
+                        }
+                    } else if (accounts.length == 1) {
+                        // have a single account, return an authtoken for it
+                        if (mActivity == null) {
+                            mFuture = getAuthToken((Account) accounts[0], mAuthTokenType,
+                                    false /* notifyAuthFailure */, mMyCallback, mHandler);
+                        } else {
+                            mFuture = getAuthToken((Account) accounts[0],
+                                    mAuthTokenType, mLoginOptions,
+                                    mActivity, mMyCallback, mHandler);
+                        }
+                    } else {
+                        if (mActivity != null) {
+                            IAccountManagerResponse chooseResponse =
+                                    new IAccountManagerResponse.Stub() {
+                                public void onResult(Bundle value) throws RemoteException {
+                                    Account account = new Account(
+                                            value.getString(Constants.ACCOUNT_NAME_KEY),
+                                            value.getString(Constants.ACCOUNT_TYPE_KEY));
+                                    mFuture = getAuthToken(account, mAuthTokenType, mLoginOptions,
+                                            mActivity, mMyCallback, mHandler);
+                                }
+
+                                public void onError(int errorCode, String errorMessage)
+                                        throws RemoteException {
+                                    mResponse.onError(errorCode, errorMessage);
+                                }
+                            };
+                            // have many accounts, launch the chooser
+                            Intent intent = new Intent();
+                            intent.setClassName("android",
+                                    "android.accounts.ChooseAccountActivity");
+                            intent.putExtra(Constants.ACCOUNTS_KEY, accounts);
+                            intent.putExtra(Constants.ACCOUNT_MANAGER_RESPONSE_KEY,
+                                    new AccountManagerResponse(chooseResponse));
+                            mActivity.startActivity(intent);
+                            // the result will arrive via the IAccountManagerResponse
+                        } else {
+                            // send result since we can't prompt to select an account
+                            Bundle result = new Bundle();
+                            result.putString(Constants.ACCOUNTS_KEY, null);
+                            try {
+                                mResponse.onResult(result);
+                            } catch (RemoteException e) {
+                                // this will never happen
+                            }
+                            // we are done
+                        }
+                    }
+                }}, mHandler);
+        }
+
+
+
+        // TODO(fredq) pass through the calls to our implemention of Future2 to the underlying
+        // future that we create. We need to do things like have cancel cancel the mFuture, if set
+        // or to cause this to be canceled if mFuture isn't set.
+        // Once this is done then getAuthTokenByFeatures can be changed to return a Future2.
+
+        public void run(Future2 future) {
+            try {
+                set(future.get());
+            } catch (InterruptedException e) {
+                cancel(true);
+            } catch (CancellationException e) {
+                cancel(true);
+            } catch (ExecutionException e) {
+                setException(e.getCause());
+            }
         }
+    }
 
-        return new AuthenticatorException("unknown error code");
+    public void getAuthTokenByFeatures(
+            final String accountType, final String authTokenType, final String[] features,
+            final Activity activityForPrompting, final Bundle addAccountOptions,
+            final Bundle loginOptions,
+            final Future2Callback callback, final Handler handler) {
+        if (accountType == null) throw new IllegalArgumentException("account type is null");
+        if (authTokenType == null) throw new IllegalArgumentException("authTokenType is null");
+        new GetAuthTokenByTypeAndFeaturesTask(accountType, authTokenType,  features,
+                activityForPrompting, addAccountOptions, loginOptions, callback, handler).start();
     }
 }
diff --git a/core/java/android/accounts/AccountManagerResponse.java b/core/java/android/accounts/AccountManagerResponse.java
new file mode 100644
index 0000000..25371fd
--- /dev/null
+++ b/core/java/android/accounts/AccountManagerResponse.java
@@ -0,0 +1,74 @@
+/*
+ * 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.accounts;
+
+import android.os.Bundle;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.os.RemoteException;
+
+/**
+ * Object that wraps calls to an {@link android.accounts.IAccountManagerResponse} object.
+ * @hide
+ */
+public class AccountManagerResponse implements Parcelable {
+    private IAccountManagerResponse mResponse;
+
+    public AccountManagerResponse(IAccountManagerResponse response) {
+        mResponse = response;
+    }
+
+    public AccountManagerResponse(Parcel parcel) {
+        mResponse =
+                IAccountManagerResponse.Stub.asInterface(parcel.readStrongBinder());
+    }
+
+    public void onResult(Bundle result) {
+        try {
+            mResponse.onResult(result);
+        } catch (RemoteException e) {
+            // this should never happen
+        }
+    }
+
+    public void onError(int errorCode, String errorMessage) {
+        try {
+            mResponse.onError(errorCode, errorMessage);
+        } catch (RemoteException e) {
+            // this should never happen
+        }
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeStrongBinder(mResponse.asBinder());
+    }
+
+    public static final Creator<AccountManagerResponse> CREATOR =
+            new Creator<AccountManagerResponse>() {
+        public AccountManagerResponse createFromParcel(Parcel source) {
+            return new AccountManagerResponse(source);
+        }
+
+        public AccountManagerResponse[] newArray(int size) {
+            return new AccountManagerResponse[size];
+        }
+    };
+}
\ No newline at end of file
diff --git a/core/java/android/accounts/AccountManagerService.java b/core/java/android/accounts/AccountManagerService.java
index 1f43620..ef0875c 100644
--- a/core/java/android/accounts/AccountManagerService.java
+++ b/core/java/android/accounts/AccountManagerService.java
@@ -59,6 +59,7 @@ import com.google.android.collect.Maps;
  * instead one uses an instance of {@link AccountManager}, which can be accessed as follows:
  *    AccountManager accountManager =
  *      (AccountManager)context.getSystemService(Context.ACCOUNT_SERVICE)
+ * @hide
  */
 public class AccountManagerService extends IAccountManager.Stub {
     private static final String TAG = "AccountManagerService";
@@ -79,7 +80,6 @@ public class AccountManagerService extends IAccountManager.Stub {
 
     private final AccountAuthenticatorCache mAuthenticatorCache;
     private final AuthenticatorBindHelper mBindHelper;
-    public final HashMap<AuthTokenKey, String> mAuthTokenCache = Maps.newHashMap();
     private final DatabaseHelper mOpenHelper;
     private final SimWatcher mSimWatcher;
 
@@ -300,7 +300,7 @@ public class AccountManagerService extends IAccountManager.Stub {
                     }
                 }
                 db.setTransactionSuccessful();
-                mContext.sendBroadcast(ACCOUNTS_CHANGED_INTENT);
+                sendAccountsChangedBroadcast();
                 return true;
             } finally {
                 db.endTransaction();
@@ -321,22 +321,10 @@ public class AccountManagerService extends IAccountManager.Stub {
     public void removeAccount(Account account) {
         long identityToken = clearCallingIdentity();
         try {
-            synchronized (mAuthTokenCache) {
-                ArrayList<AuthTokenKey> keysToRemove = Lists.newArrayList();
-                for (AuthTokenKey key : mAuthTokenCache.keySet()) {
-                    if (key.mAccount.equals(account)) {
-                        keysToRemove.add(key);
-                    }
-                }
-                for (AuthTokenKey key : keysToRemove) {
-                    mAuthTokenCache.remove(key);
-                }
-
-                final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
-                db.delete(TABLE_ACCOUNTS, ACCOUNTS_NAME + "=? AND " + ACCOUNTS_TYPE+ "=?",
-                        new String[]{account.mName, account.mType});
-                mContext.sendBroadcast(ACCOUNTS_CHANGED_INTENT);
-            }
+            final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
+            db.delete(TABLE_ACCOUNTS, ACCOUNTS_NAME + "=? AND " + ACCOUNTS_TYPE+ "=?",
+                    new String[]{account.mName, account.mType});
+            sendAccountsChangedBroadcast();
         } finally {
             restoreCallingIdentity(identityToken);
         }
@@ -359,31 +347,26 @@ public class AccountManagerService extends IAccountManager.Stub {
     }
 
     private void invalidateAuthToken(SQLiteDatabase db, String accountType, String authToken) {
-        synchronized (mAuthTokenCache) {
-            Cursor cursor = db.rawQuery(
-                    "SELECT " + TABLE_AUTHTOKENS + "." + AUTHTOKENS_ID
-                            + ", " + TABLE_ACCOUNTS + "." + ACCOUNTS_NAME
-                            + ", " + TABLE_AUTHTOKENS + "." + AUTHTOKENS_TYPE
-                            + " FROM " + TABLE_ACCOUNTS
-                            + " JOIN " + TABLE_AUTHTOKENS
-                            + " ON " + TABLE_ACCOUNTS + "." + ACCOUNTS_ID
-                            + " = " + AUTHTOKENS_ACCOUNTS_ID
-                            + " WHERE " + AUTHTOKENS_AUTHTOKEN + " = ? AND "
-                            + TABLE_ACCOUNTS + "." + ACCOUNTS_TYPE + " = ?",
-                    new String[]{authToken, accountType});
-            try {
-                while (cursor.moveToNext()) {
-                    long authTokenId = cursor.getLong(0);
-                    String accountName = cursor.getString(1);
-                    String authTokenType = cursor.getString(2);
-                    AuthTokenKey key = new AuthTokenKey(new Account(accountName, accountType),
-                            authTokenType);
-                    mAuthTokenCache.remove(key);
-                    db.delete(TABLE_AUTHTOKENS, AUTHTOKENS_ID + "=" + authTokenId, null);
-                }
-            } finally {
-                cursor.close();
+        Cursor cursor = db.rawQuery(
+                "SELECT " + TABLE_AUTHTOKENS + "." + AUTHTOKENS_ID
+                        + ", " + TABLE_ACCOUNTS + "." + ACCOUNTS_NAME
+                        + ", " + TABLE_AUTHTOKENS + "." + AUTHTOKENS_TYPE
+                        + " FROM " + TABLE_ACCOUNTS
+                        + " JOIN " + TABLE_AUTHTOKENS
+                        + " ON " + TABLE_ACCOUNTS + "." + ACCOUNTS_ID
+                        + " = " + AUTHTOKENS_ACCOUNTS_ID
+                        + " WHERE " + AUTHTOKENS_AUTHTOKEN + " = ? AND "
+                        + TABLE_ACCOUNTS + "." + ACCOUNTS_TYPE + " = ?",
+                new String[]{authToken, accountType});
+        try {
+            while (cursor.moveToNext()) {
+                long authTokenId = cursor.getLong(0);
+                String accountName = cursor.getString(1);
+                String authTokenType = cursor.getString(2);
+                db.delete(TABLE_AUTHTOKENS, AUTHTOKENS_ID + "=" + authTokenId, null);
             }
+        } finally {
+            cursor.close();
         }
     }
 
@@ -391,8 +374,18 @@ public class AccountManagerService extends IAccountManager.Stub {
         SQLiteDatabase db = mOpenHelper.getWritableDatabase();
         db.beginTransaction();
         try {
-            if (saveAuthTokenToDatabase(db, account, type, authToken)) {
-                mContext.sendBroadcast(ACCOUNTS_CHANGED_INTENT);
+            long accountId = getAccountId(db, account);
+            if (accountId < 0) {
+                return false;
+            }
+            db.delete(TABLE_AUTHTOKENS,
+                    AUTHTOKENS_ACCOUNTS_ID + "=" + accountId + " AND " + AUTHTOKENS_TYPE + "=?",
+                    new String[]{type});
+            ContentValues values = new ContentValues();
+            values.put(AUTHTOKENS_ACCOUNTS_ID, accountId);
+            values.put(AUTHTOKENS_TYPE, type);
+            values.put(AUTHTOKENS_AUTHTOKEN, authToken);
+            if (db.insert(TABLE_AUTHTOKENS, AUTHTOKENS_AUTHTOKEN, values) >= 0) {
                 db.setTransactionSuccessful();
                 return true;
             }
@@ -402,22 +395,6 @@ public class AccountManagerService extends IAccountManager.Stub {
         }
     }
 
-    private boolean saveAuthTokenToDatabase(SQLiteDatabase db, Account account, 
-            String type, String authToken) {
-        long accountId = getAccountId(db, account);
-        if (accountId < 0) {
-            return false;
-        }
-        db.delete(TABLE_AUTHTOKENS,
-                AUTHTOKENS_ACCOUNTS_ID + "=" + accountId + " AND " + AUTHTOKENS_TYPE + "=?",
-                new String[]{type});
-        ContentValues values = new ContentValues();
-        values.put(AUTHTOKENS_ACCOUNTS_ID, accountId);
-        values.put(AUTHTOKENS_TYPE, type);
-        values.put(AUTHTOKENS_AUTHTOKEN, authToken);
-        return db.insert(TABLE_AUTHTOKENS, AUTHTOKENS_AUTHTOKEN, values) >= 0;
-    }
-
     public String readAuthTokenFromDatabase(Account account, String authTokenType) {
         SQLiteDatabase db = mOpenHelper.getReadableDatabase();
         db.beginTransaction();
@@ -436,13 +413,7 @@ public class AccountManagerService extends IAccountManager.Stub {
     public String peekAuthToken(Account account, String authTokenType) {
         long identityToken = clearCallingIdentity();
         try {
-            synchronized (mAuthTokenCache) {
-                AuthTokenKey key = new AuthTokenKey(account, authTokenType);
-                if (mAuthTokenCache.containsKey(key)) {
-                    return mAuthTokenCache.get(key);
-                }
-                return readAuthTokenFromDatabase(account, authTokenType);
-            }
+            return readAuthTokenFromDatabase(account, authTokenType);
         } finally {
             restoreCallingIdentity(identityToken);
         }
@@ -465,12 +436,16 @@ public class AccountManagerService extends IAccountManager.Stub {
             mOpenHelper.getWritableDatabase().update(TABLE_ACCOUNTS, values,
                     ACCOUNTS_NAME + "=? AND " + ACCOUNTS_TYPE+ "=?",
                     new String[]{account.mName, account.mType});
-            mContext.sendBroadcast(ACCOUNTS_CHANGED_INTENT);
+            sendAccountsChangedBroadcast();
         } finally {
             restoreCallingIdentity(identityToken);
         }
     }
 
+    private void sendAccountsChangedBroadcast() {
+        mContext.sendBroadcast(ACCOUNTS_CHANGED_INTENT);
+    }
+
     public void clearPassword(Account account) {
         long identityToken = clearCallingIdentity();
         try {
@@ -518,7 +493,7 @@ public class AccountManagerService extends IAccountManager.Stub {
             final boolean expectActivityLaunch, final Bundle loginOptions) {
         long identityToken = clearCallingIdentity();
         try {
-            String authToken = getCachedAuthToken(account, authTokenType);
+            String authToken = readAuthTokenFromDatabase(account, authTokenType);
             if (authToken != null) {
                 try {
                     Bundle result = new Bundle();
@@ -578,19 +553,24 @@ public class AccountManagerService extends IAccountManager.Stub {
     }
 
 
-    public void addAcount(final IAccountManagerResponse response,
-            final String accountType, final String authTokenType,
+    public void addAcount(final IAccountManagerResponse response, final String accountType,
+            final String authTokenType, final String[] requiredFeatures,
             final boolean expectActivityLaunch, final Bundle options) {
         long identityToken = clearCallingIdentity();
         try {
             new Session(response, accountType, expectActivityLaunch) {
                 public void run() throws RemoteException {
-                    mAuthenticator.addAccount(this, mAccountType, authTokenType, options);
+                    mAuthenticator.addAccount(this, mAccountType, authTokenType, requiredFeatures, 
+                            options);
                 }
 
                 protected String toDebugString(long now) {
                     return super.toDebugString(now) + ", addAccount"
-                            + ", accountType " + accountType;
+                            + ", accountType " + accountType
+                            + ", requiredFeatures "
+                            + (requiredFeatures != null
+                              ? TextUtils.join(",", requiredFeatures)
+                              : null);
                 }
             }.bind();
         } finally {
@@ -674,24 +654,101 @@ public class AccountManagerService extends IAccountManager.Stub {
         }
     }
 
-    private boolean cacheAuthToken(Account account, String authTokenType, String authToken) {
-        synchronized (mAuthTokenCache) {
-            if (saveAuthTokenToDatabase(account, authTokenType, authToken)) {
-                final AuthTokenKey key = new AuthTokenKey(account, authTokenType);
-                mAuthTokenCache.put(key, authToken);
-                return true;
-            } else {
-                return false;
+    private class GetAccountsByTypeAndFeatureSession extends Session {
+        private final String[] mFeatures;
+        private volatile Account[] mAccountsOfType = null;
+        private volatile ArrayList<Account> mAccountsWithFeatures = null;
+        private volatile int mCurrentAccount = 0;
+
+        public GetAccountsByTypeAndFeatureSession(IAccountManagerResponse response,
+            String type, String[] features) {
+            super(response, type, false /* expectActivityLaunch */);
+            mFeatures = features;
+        }
+
+        public void run() throws RemoteException {
+            mAccountsOfType = getAccountsByType(mAccountType);
+            // check whether each account matches the requested features
+            mAccountsWithFeatures = new ArrayList<Account>(mAccountsOfType.length);
+            mCurrentAccount = 0;
+
+            checkAccount();
+        }
+
+        public void checkAccount() {
+            if (mCurrentAccount >= mAccountsOfType.length) {
+                sendResult();
+                return;
+            }
+
+            try {
+                mAuthenticator.hasFeatures(this, mAccountsOfType[mCurrentAccount], mFeatures);
+            } catch (RemoteException e) {
+                onError(Constants.ERROR_CODE_REMOTE_EXCEPTION, "remote exception");
             }
         }
-    }
 
-    private String getCachedAuthToken(Account account, String authTokenType) {
-        synchronized (mAuthTokenCache) {
-            final AuthTokenKey key = new AuthTokenKey(account, authTokenType);
-            if (!mAuthTokenCache.containsKey(key)) return null;
-            return mAuthTokenCache.get(key);
+        public void onResult(Bundle result) {
+            mNumResults++;
+            if (result == null) {
+                onError(Constants.ERROR_CODE_INVALID_RESPONSE, "null bundle");
+                return;
+            }
+            if (result.getBoolean(Constants.BOOLEAN_RESULT_KEY, false)) {
+                mAccountsWithFeatures.add(mAccountsOfType[mCurrentAccount]);
+            }
+            mCurrentAccount++;
+            checkAccount();
         }
+
+        public void sendResult() {
+            IAccountManagerResponse response = getResponseAndClose();
+            if (response != null) {
+                try {
+                    Account[] accounts = new Account[mAccountsWithFeatures.size()];
+                    for (int i = 0; i < accounts.length; i++) {
+                        accounts[i] = mAccountsWithFeatures.get(i);
+                    }
+                    Bundle result = new Bundle();
+                    result.putParcelableArray(Constants.ACCOUNTS_KEY, accounts);
+                    response.onResult(result);
+                } catch (RemoteException e) {
+                    // if the caller is dead then there is no one to care about remote exceptions
+                    if (Log.isLoggable(TAG, Log.VERBOSE)) {
+                        Log.v(TAG, "failure while notifying response", e);
+                    }
+                }
+            }
+        }
+
+
+        protected String toDebugString(long now) {
+            return super.toDebugString(now) + ", getAccountsByTypeAndFeatures"
+                    + ", " + (mFeatures != null ? TextUtils.join(",", mFeatures) : null);
+        }
+    }
+    public void getAccountsByTypeAndFeatures(IAccountManagerResponse response,
+            String type, String[] features) {
+        if (type == null) {
+            if (response != null) {
+                try {
+                    response.onError(Constants.ERROR_CODE_BAD_ARGUMENTS, "type is null");
+                } catch (RemoteException e) {
+                    // ignore this
+                }
+            }
+            return;
+        }
+        long identityToken = clearCallingIdentity();
+        try {
+            new GetAccountsByTypeAndFeatureSession(response, type, features).bind();
+        } finally {
+            restoreCallingIdentity(identityToken);
+        }
+    }
+
+    private boolean cacheAuthToken(Account account, String authTokenType, String authToken) {
+        return saveAuthTokenToDatabase(account, authTokenType, authToken);
     }
 
     private long getAccountId(SQLiteDatabase db, Account account) {
@@ -743,7 +800,7 @@ public class AccountManagerService extends IAccountManager.Stub {
         final boolean mExpectActivityLaunch;
         final long mCreationTime;
 
-        private int mNumResults = 0;
+        public int mNumResults = 0;
         private int mNumRequestContinued = 0;
         private int mNumErrors = 0;
 
@@ -754,6 +811,7 @@ public class AccountManagerService extends IAccountManager.Stub {
                 boolean expectActivityLaunch) {
             super();
             if (response == null) throw new IllegalArgumentException("response is null");
+            if (accountType == null) throw new IllegalArgumentException("accountType is null");
             mResponse = response;
             mAccountType = accountType;
             mExpectActivityLaunch = expectActivityLaunch;
@@ -1071,7 +1129,7 @@ public class AccountManagerService extends IAccountManager.Stub {
                 try {
                     db.execSQL("DELETE from " + TABLE_AUTHTOKENS);
                     db.execSQL("UPDATE " + TABLE_ACCOUNTS + " SET " + ACCOUNTS_PASSWORD + " = ''");
-                    mContext.sendBroadcast(ACCOUNTS_CHANGED_INTENT);
+                    sendAccountsChangedBroadcast();
                     db.setTransactionSuccessful();
                 } finally {
                     db.endTransaction();
diff --git a/core/java/android/accounts/ChooseAccountActivity.java b/core/java/android/accounts/ChooseAccountActivity.java
new file mode 100644
index 0000000..83377f3
--- /dev/null
+++ b/core/java/android/accounts/ChooseAccountActivity.java
@@ -0,0 +1,78 @@
+/*
+ * 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.accounts;
+
+import android.app.ListActivity;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.view.View;
+import android.util.Log;
+
+public class ChooseAccountActivity extends ListActivity {
+    private static final String TAG = "AccountManager";
+    private Parcelable[] mAccounts = null;
+    private AccountManagerResponse mAccountManagerResponse = null;
+    private Bundle mResult;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if (savedInstanceState == null) {
+            mAccounts = getIntent().getParcelableArrayExtra(Constants.ACCOUNTS_KEY);
+            mAccountManagerResponse =
+                    getIntent().getParcelableExtra(Constants.ACCOUNT_MANAGER_RESPONSE_KEY);
+        } else {
+            mAccounts = savedInstanceState.getParcelableArray(Constants.ACCOUNTS_KEY);
+            mAccountManagerResponse =
+                    savedInstanceState.getParcelable(Constants.ACCOUNT_MANAGER_RESPONSE_KEY);
+        }
+
+        String[] mAccountNames = new String[mAccounts.length];
+        for (int i = 0; i < mAccounts.length; i++) {
+            mAccountNames[i] = ((Account) mAccounts[i]).mName;
+        }
+
+        // Use an existing ListAdapter that will map an array
+        // of strings to TextViews
+        setListAdapter(new ArrayAdapter<String>(this,
+                android.R.layout.simple_list_item_1, mAccountNames));
+        getListView().setTextFilterEnabled(true);
+    }
+
+    protected void onListItemClick(ListView l, View v, int position, long id) {
+        Account account = (Account) mAccounts[position];
+        Log.d(TAG, "selected account " + account);
+        Bundle bundle = new Bundle();
+        bundle.putString(Constants.ACCOUNT_NAME_KEY, account.mName);
+        bundle.putString(Constants.ACCOUNT_TYPE_KEY, account.mType);
+        mResult = bundle;
+        finish();
+    }
+
+    public void finish() {
+        if (mAccountManagerResponse != null) {
+            if (mResult != null) {
+                mAccountManagerResponse.onResult(mResult);
+            } else {
+                mAccountManagerResponse.onError(Constants.ERROR_CODE_CANCELED, "canceled");
+            }
+        }
+        super.finish();
+    }
+}
diff --git a/core/java/android/accounts/Constants.java b/core/java/android/accounts/Constants.java
index d3b6aa0..b383c61 100644
--- a/core/java/android/accounts/Constants.java
+++ b/core/java/android/accounts/Constants.java
@@ -24,6 +24,7 @@ public class Constants {
     public static final int ERROR_CODE_CANCELED = 4;
     public static final int ERROR_CODE_INVALID_RESPONSE = 5;
     public static final int ERROR_CODE_UNSUPPORTED_OPERATION = 6;
+    public static final int ERROR_CODE_BAD_ARGUMENTS = 7;
 
     public static final String ACCOUNTS_KEY = "accounts";
     public static final String AUTHENTICATOR_TYPES_KEY = "authenticator_types";
@@ -37,6 +38,7 @@ public class Constants {
     public static final String INTENT_KEY = "intent";
     public static final String BOOLEAN_RESULT_KEY = "booleanResult";
     public static final String ACCOUNT_AUTHENTICATOR_RESPONSE_KEY = "accountAuthenticatorResponse";
+    public static final String ACCOUNT_MANAGER_RESPONSE_KEY = "accountManagerResponse";
     public static final String AUTH_FAILED_MESSAGE_KEY = "authFailedMessage";
     /**
      * Action sent as a broadcast Intent by the AccountsService
diff --git a/core/java/android/accounts/IAccountAuthenticator.aidl b/core/java/android/accounts/IAccountAuthenticator.aidl
index 70c0752..46a7144 100644
--- a/core/java/android/accounts/IAccountAuthenticator.aidl
+++ b/core/java/android/accounts/IAccountAuthenticator.aidl
@@ -28,7 +28,7 @@ oneway interface IAccountAuthenticator {
      * prompts the user for account information and adds the result to the IAccountManager
      */
     void addAccount(in IAccountAuthenticatorResponse response, String accountType,
-        String authTokenType, in Bundle options);
+        String authTokenType, in String[] requiredFeatures, in Bundle options);
 
     /**
      * Checks that the account/password combination is valid.
@@ -58,4 +58,11 @@ oneway interface IAccountAuthenticator {
      * launches an activity that lets the user edit and set the properties for an authenticator
      */
     void editProperties(in IAccountAuthenticatorResponse response, String accountType);
+
+    /**
+     * returns a Bundle where the boolean value BOOLEAN_RESULT_KEY is set if the account has the
+     * specified features
+     */
+    void hasFeatures(in IAccountAuthenticatorResponse response, in Account account, 
+        in String[] features);
 }
diff --git a/core/java/android/accounts/IAccountManager.aidl b/core/java/android/accounts/IAccountManager.aidl
index 365a92a..5e37a1f 100644
--- a/core/java/android/accounts/IAccountManager.aidl
+++ b/core/java/android/accounts/IAccountManager.aidl
@@ -22,6 +22,7 @@ import android.os.Bundle;
 
 /**
  * Central application service that provides account management.
+ * @hide
  */
 interface IAccountManager {
     String getPassword(in Account account);
@@ -42,16 +43,19 @@ interface IAccountManager {
         String authTokenType, boolean notifyOnAuthFailure, boolean expectActivityLaunch,
         in Bundle options);
     void addAcount(in IAccountManagerResponse response, String accountType,
-        String authTokenType, boolean expectActivityLaunch, in Bundle options);
+        String authTokenType, in String[] requiredFeatures, boolean expectActivityLaunch, 
+        in Bundle options);
     void updateCredentials(in IAccountManagerResponse response, in Account account,
         String authTokenType, boolean expectActivityLaunch, in Bundle options);
     void editProperties(in IAccountManagerResponse response, String accountType,
         boolean expectActivityLaunch);
     void confirmCredentials(in IAccountManagerResponse response, in Account account,
         boolean expectActivityLaunch);
+    void getAccountsByTypeAndFeatures(in IAccountManagerResponse response, String accountType,
+        in String[] features);
 
     /*
-     * @Deprecated
+     * @deprecated
      */
     void confirmPassword(in IAccountManagerResponse response, in Account account,
         String password);
diff --git a/core/java/android/accounts/IAccountManagerResponse.aidl b/core/java/android/accounts/IAccountManagerResponse.aidl
index 52f21bc..ca1203d 100644
--- a/core/java/android/accounts/IAccountManagerResponse.aidl
+++ b/core/java/android/accounts/IAccountManagerResponse.aidl
@@ -19,6 +19,7 @@ import android.os.Bundle;
 
 /**
  * The interface used to return responses for asynchronous calls to the {@link IAccountManager}
+ * @hide
  */
 oneway interface IAccountManagerResponse {
     void onResult(in Bundle value);