The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | package android.content; |
| 2 | |
| 3 | import android.database.sqlite.SQLiteOpenHelper; |
| 4 | import android.database.sqlite.SQLiteDatabase; |
| 5 | import android.database.Cursor; |
| 6 | import android.net.Uri; |
| 7 | import android.accounts.AccountMonitor; |
| 8 | import android.accounts.AccountMonitorListener; |
| 9 | import android.provider.SyncConstValue; |
| 10 | import android.util.Config; |
| 11 | import android.util.Log; |
| 12 | import android.os.Bundle; |
| 13 | import android.text.TextUtils; |
| 14 | |
| 15 | import java.util.Collections; |
| 16 | import java.util.Map; |
| 17 | import java.util.HashMap; |
| 18 | import java.util.Vector; |
| 19 | import java.util.ArrayList; |
| 20 | |
| 21 | /** |
| 22 | * A specialization of the ContentProvider that centralizes functionality |
| 23 | * used by ContentProviders that are syncable. It also wraps calls to the ContentProvider |
| 24 | * inside of database transactions. |
| 25 | * |
| 26 | * @hide |
| 27 | */ |
| 28 | public abstract class AbstractSyncableContentProvider extends SyncableContentProvider { |
| 29 | private static final String TAG = "SyncableContentProvider"; |
| 30 | protected SQLiteOpenHelper mOpenHelper; |
| 31 | protected SQLiteDatabase mDb; |
| 32 | private final String mDatabaseName; |
| 33 | private final int mDatabaseVersion; |
| 34 | private final Uri mContentUri; |
| 35 | private AccountMonitor mAccountMonitor; |
| 36 | |
| 37 | /** the account set in the last call to onSyncStart() */ |
| 38 | private String mSyncingAccount; |
| 39 | |
| 40 | private SyncStateContentProviderHelper mSyncState = null; |
| 41 | |
| 42 | private static final String[] sAccountProjection = new String[] {SyncConstValue._SYNC_ACCOUNT}; |
| 43 | |
| 44 | private boolean mIsTemporary; |
| 45 | |
| 46 | private AbstractTableMerger mCurrentMerger = null; |
| 47 | private boolean mIsMergeCancelled = false; |
| 48 | |
| 49 | private static final String SYNC_ACCOUNT_WHERE_CLAUSE = SyncConstValue._SYNC_ACCOUNT + "=?"; |
| 50 | |
| 51 | protected boolean isTemporary() { |
| 52 | return mIsTemporary; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Indicates whether or not this ContentProvider contains a full |
| 57 | * set of data or just diffs. This knowledge comes in handy when |
| 58 | * determining how to incorporate the contents of a temporary |
| 59 | * provider into a real provider. |
| 60 | */ |
| 61 | private boolean mContainsDiffs; |
| 62 | |
| 63 | /** |
| 64 | * Initializes the AbstractSyncableContentProvider |
| 65 | * @param dbName the filename of the database |
| 66 | * @param dbVersion the current version of the database schema |
| 67 | * @param contentUri The base Uri of the syncable content in this provider |
| 68 | */ |
| 69 | public AbstractSyncableContentProvider(String dbName, int dbVersion, Uri contentUri) { |
| 70 | super(); |
| 71 | |
| 72 | mDatabaseName = dbName; |
| 73 | mDatabaseVersion = dbVersion; |
| 74 | mContentUri = contentUri; |
| 75 | mIsTemporary = false; |
| 76 | setContainsDiffs(false); |
| 77 | if (Config.LOGV) { |
| 78 | Log.v(TAG, "created SyncableContentProvider " + this); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Close resources that must be closed. You must call this to properly release |
| 84 | * the resources used by the AbstractSyncableContentProvider. |
| 85 | */ |
| 86 | public void close() { |
| 87 | if (mOpenHelper != null) { |
| 88 | mOpenHelper.close(); // OK to call .close() repeatedly. |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Override to create your schema and do anything else you need to do with a new database. |
| 94 | * This is run inside a transaction (so you don't need to use one). |
| 95 | * This method may not use getDatabase(), or call content provider methods, it must only |
| 96 | * use the database handle passed to it. |
| 97 | */ |
| 98 | protected void bootstrapDatabase(SQLiteDatabase db) {} |
| 99 | |
| 100 | /** |
| 101 | * Override to upgrade your database from an old version to the version you specified. |
| 102 | * Don't set the DB version; this will automatically be done after the method returns. |
| 103 | * This method may not use getDatabase(), or call content provider methods, it must only |
| 104 | * use the database handle passed to it. |
| 105 | * |
| 106 | * @param oldVersion version of the existing database |
| 107 | * @param newVersion current version to upgrade to |
| 108 | * @return true if the upgrade was lossless, false if it was lossy |
| 109 | */ |
| 110 | protected abstract boolean upgradeDatabase(SQLiteDatabase db, int oldVersion, int newVersion); |
| 111 | |
| 112 | /** |
| 113 | * Override to do anything (like cleanups or checks) you need to do after opening a database. |
| 114 | * Does nothing by default. This is run inside a transaction (so you don't need to use one). |
| 115 | * This method may not use getDatabase(), or call content provider methods, it must only |
| 116 | * use the database handle passed to it. |
| 117 | */ |
| 118 | protected void onDatabaseOpened(SQLiteDatabase db) {} |
| 119 | |
| 120 | private class DatabaseHelper extends SQLiteOpenHelper { |
| 121 | DatabaseHelper(Context context, String name) { |
| 122 | // Note: context and name may be null for temp providers |
| 123 | super(context, name, null, mDatabaseVersion); |
| 124 | } |
| 125 | |
| 126 | @Override |
| 127 | public void onCreate(SQLiteDatabase db) { |
| 128 | bootstrapDatabase(db); |
| 129 | mSyncState.createDatabase(db); |
| 130 | } |
| 131 | |
| 132 | @Override |
| 133 | public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { |
| 134 | if (!upgradeDatabase(db, oldVersion, newVersion)) { |
| 135 | mSyncState.discardSyncData(db, null /* all accounts */); |
| 136 | getContext().getContentResolver().startSync(mContentUri, new Bundle()); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | @Override |
| 141 | public void onOpen(SQLiteDatabase db) { |
| 142 | onDatabaseOpened(db); |
| 143 | mSyncState.onDatabaseOpened(db); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | @Override |
| 148 | public boolean onCreate() { |
| 149 | if (isTemporary()) throw new IllegalStateException("onCreate() called for temp provider"); |
| 150 | mOpenHelper = new AbstractSyncableContentProvider.DatabaseHelper(getContext(), mDatabaseName); |
| 151 | mSyncState = new SyncStateContentProviderHelper(mOpenHelper); |
| 152 | |
| 153 | AccountMonitorListener listener = new AccountMonitorListener() { |
| 154 | public void onAccountsUpdated(String[] accounts) { |
| 155 | // Some providers override onAccountsChanged(); give them a database to work with. |
| 156 | mDb = mOpenHelper.getWritableDatabase(); |
| 157 | onAccountsChanged(accounts); |
| 158 | TempProviderSyncAdapter syncAdapter = (TempProviderSyncAdapter)getSyncAdapter(); |
| 159 | if (syncAdapter != null) { |
| 160 | syncAdapter.onAccountsChanged(accounts); |
| 161 | } |
| 162 | } |
| 163 | }; |
| 164 | mAccountMonitor = new AccountMonitor(getContext(), listener); |
| 165 | |
| 166 | return true; |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Get a non-persistent instance of this content provider. |
| 171 | * You must call {@link #close} on the returned |
| 172 | * SyncableContentProvider when you are done with it. |
| 173 | * |
| 174 | * @return a non-persistent content provider with the same layout as this |
| 175 | * provider. |
| 176 | */ |
| 177 | public AbstractSyncableContentProvider getTemporaryInstance() { |
| 178 | AbstractSyncableContentProvider temp; |
| 179 | try { |
| 180 | temp = getClass().newInstance(); |
| 181 | } catch (InstantiationException e) { |
| 182 | throw new RuntimeException("unable to instantiate class, " |
| 183 | + "this should never happen", e); |
| 184 | } catch (IllegalAccessException e) { |
| 185 | throw new RuntimeException( |
| 186 | "IllegalAccess while instantiating class, " |
| 187 | + "this should never happen", e); |
| 188 | } |
| 189 | |
| 190 | // Note: onCreate() isn't run for the temp provider, and it has no Context. |
| 191 | temp.mIsTemporary = true; |
| 192 | temp.setContainsDiffs(true); |
| 193 | temp.mOpenHelper = temp.new DatabaseHelper(null, null); |
| 194 | temp.mSyncState = new SyncStateContentProviderHelper(temp.mOpenHelper); |
| 195 | if (!isTemporary()) { |
| 196 | mSyncState.copySyncState( |
| 197 | mOpenHelper.getReadableDatabase(), |
| 198 | temp.mOpenHelper.getWritableDatabase(), |
| 199 | getSyncingAccount()); |
| 200 | } |
| 201 | return temp; |
| 202 | } |
| 203 | |
| 204 | public SQLiteDatabase getDatabase() { |
| 205 | if (mDb == null) mDb = mOpenHelper.getWritableDatabase(); |
| 206 | return mDb; |
| 207 | } |
| 208 | |
| 209 | public boolean getContainsDiffs() { |
| 210 | return mContainsDiffs; |
| 211 | } |
| 212 | |
| 213 | public void setContainsDiffs(boolean containsDiffs) { |
| 214 | if (containsDiffs && !isTemporary()) { |
| 215 | throw new IllegalStateException( |
| 216 | "only a temporary provider can contain diffs"); |
| 217 | } |
| 218 | mContainsDiffs = containsDiffs; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Each subclass of this class should define a subclass of {@link |
| 223 | * android.content.AbstractTableMerger} for each table they wish to merge. It |
| 224 | * should then override this method and return one instance of |
| 225 | * each merger, in sequence. Their {@link |
| 226 | * android.content.AbstractTableMerger#merge merge} methods will be called, one at a |
| 227 | * time, in the order supplied. |
| 228 | * |
| 229 | * <p>The default implementation returns an empty list, so that no |
| 230 | * merging will occur. |
| 231 | * @return A sequence of subclasses of {@link |
| 232 | * android.content.AbstractTableMerger}, one for each table that should be merged. |
| 233 | */ |
| 234 | protected Iterable<? extends AbstractTableMerger> getMergers() { |
| 235 | return Collections.emptyList(); |
| 236 | } |
| 237 | |
| 238 | @Override |
| 239 | public final int update(final Uri url, final ContentValues values, |
| 240 | final String selection, final String[] selectionArgs) { |
| 241 | mDb = mOpenHelper.getWritableDatabase(); |
| 242 | mDb.beginTransaction(); |
| 243 | try { |
| 244 | if (isTemporary() && mSyncState.matches(url)) { |
| 245 | int numRows = mSyncState.asContentProvider().update( |
| 246 | url, values, selection, selectionArgs); |
| 247 | mDb.setTransactionSuccessful(); |
| 248 | return numRows; |
| 249 | } |
| 250 | |
| 251 | int result = updateInternal(url, values, selection, selectionArgs); |
| 252 | mDb.setTransactionSuccessful(); |
| 253 | |
| 254 | if (!isTemporary() && result > 0) { |
| 255 | getContext().getContentResolver().notifyChange(url, null /* observer */, |
| 256 | changeRequiresLocalSync(url)); |
| 257 | } |
| 258 | |
| 259 | return result; |
| 260 | } finally { |
| 261 | mDb.endTransaction(); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | @Override |
| 266 | public final int delete(final Uri url, final String selection, |
| 267 | final String[] selectionArgs) { |
| 268 | mDb = mOpenHelper.getWritableDatabase(); |
| 269 | mDb.beginTransaction(); |
| 270 | try { |
| 271 | if (isTemporary() && mSyncState.matches(url)) { |
| 272 | int numRows = mSyncState.asContentProvider().delete(url, selection, selectionArgs); |
| 273 | mDb.setTransactionSuccessful(); |
| 274 | return numRows; |
| 275 | } |
| 276 | int result = deleteInternal(url, selection, selectionArgs); |
| 277 | mDb.setTransactionSuccessful(); |
| 278 | if (!isTemporary() && result > 0) { |
| 279 | getContext().getContentResolver().notifyChange(url, null /* observer */, |
| 280 | changeRequiresLocalSync(url)); |
| 281 | } |
| 282 | return result; |
| 283 | } finally { |
| 284 | mDb.endTransaction(); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | @Override |
| 289 | public final Uri insert(final Uri url, final ContentValues values) { |
| 290 | mDb = mOpenHelper.getWritableDatabase(); |
| 291 | mDb.beginTransaction(); |
| 292 | try { |
| 293 | if (isTemporary() && mSyncState.matches(url)) { |
| 294 | Uri result = mSyncState.asContentProvider().insert(url, values); |
| 295 | mDb.setTransactionSuccessful(); |
| 296 | return result; |
| 297 | } |
| 298 | Uri result = insertInternal(url, values); |
| 299 | mDb.setTransactionSuccessful(); |
| 300 | if (!isTemporary() && result != null) { |
| 301 | getContext().getContentResolver().notifyChange(url, null /* observer */, |
| 302 | changeRequiresLocalSync(url)); |
| 303 | } |
| 304 | return result; |
| 305 | } finally { |
| 306 | mDb.endTransaction(); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | @Override |
| 311 | public final int bulkInsert(final Uri uri, final ContentValues[] values) { |
| 312 | int size = values.length; |
| 313 | int completed = 0; |
| 314 | final boolean isSyncStateUri = mSyncState.matches(uri); |
| 315 | mDb = mOpenHelper.getWritableDatabase(); |
| 316 | mDb.beginTransaction(); |
| 317 | try { |
| 318 | for (int i = 0; i < size; i++) { |
| 319 | Uri result; |
| 320 | if (isTemporary() && isSyncStateUri) { |
| 321 | result = mSyncState.asContentProvider().insert(uri, values[i]); |
| 322 | } else { |
| 323 | result = insertInternal(uri, values[i]); |
| 324 | mDb.yieldIfContended(); |
| 325 | } |
| 326 | if (result != null) { |
| 327 | completed++; |
| 328 | } |
| 329 | } |
| 330 | mDb.setTransactionSuccessful(); |
| 331 | } finally { |
| 332 | mDb.endTransaction(); |
| 333 | } |
| 334 | if (!isTemporary() && completed == size) { |
| 335 | getContext().getContentResolver().notifyChange(uri, null /* observer */, |
| 336 | changeRequiresLocalSync(uri)); |
| 337 | } |
| 338 | return completed; |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * Check if changes to this URI can be syncable changes. |
| 343 | * @param uri the URI of the resource that was changed |
| 344 | * @return true if changes to this URI can be syncable changes, false otherwise |
| 345 | */ |
| 346 | public boolean changeRequiresLocalSync(Uri uri) { |
| 347 | return true; |
| 348 | } |
| 349 | |
| 350 | @Override |
| 351 | public final Cursor query(final Uri url, final String[] projection, |
| 352 | final String selection, final String[] selectionArgs, |
| 353 | final String sortOrder) { |
| 354 | mDb = mOpenHelper.getReadableDatabase(); |
| 355 | if (isTemporary() && mSyncState.matches(url)) { |
| 356 | return mSyncState.asContentProvider().query( |
| 357 | url, projection, selection, selectionArgs, sortOrder); |
| 358 | } |
| 359 | return queryInternal(url, projection, selection, selectionArgs, sortOrder); |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * Called right before a sync is started. |
| 364 | * |
| 365 | * @param context the sync context for the operation |
| 366 | * @param account |
| 367 | */ |
| 368 | public void onSyncStart(SyncContext context, String account) { |
| 369 | if (TextUtils.isEmpty(account)) { |
| 370 | throw new IllegalArgumentException("you passed in an empty account"); |
| 371 | } |
| 372 | mSyncingAccount = account; |
| 373 | } |
| 374 | |
| 375 | /** |
| 376 | * Called right after a sync is completed |
| 377 | * |
| 378 | * @param context the sync context for the operation |
| 379 | * @param success true if the sync succeeded, false if an error occurred |
| 380 | */ |
| 381 | public void onSyncStop(SyncContext context, boolean success) { |
| 382 | } |
| 383 | |
| 384 | /** |
| 385 | * The account of the most recent call to onSyncStart() |
| 386 | * @return the account |
| 387 | */ |
| 388 | public String getSyncingAccount() { |
| 389 | return mSyncingAccount; |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * Merge diffs from a sync source with this content provider. |
| 394 | * |
| 395 | * @param context the SyncContext within which this merge is taking place |
| 396 | * @param diffs A temporary content provider containing diffs from a sync |
| 397 | * source. |
| 398 | * @param result a MergeResult that contains information about the merge, including |
| 399 | * a temporary content provider with the same layout as this provider containing |
| 400 | * @param syncResult |
| 401 | */ |
| 402 | public void merge(SyncContext context, SyncableContentProvider diffs, |
| 403 | TempProviderSyncResult result, SyncResult syncResult) { |
| 404 | SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| 405 | db.beginTransaction(); |
| 406 | try { |
| 407 | synchronized(this) { |
| 408 | mIsMergeCancelled = false; |
| 409 | } |
| 410 | Iterable<? extends AbstractTableMerger> mergers = getMergers(); |
| 411 | try { |
| 412 | for (AbstractTableMerger merger : mergers) { |
| 413 | synchronized(this) { |
| 414 | if (mIsMergeCancelled) break; |
| 415 | mCurrentMerger = merger; |
| 416 | } |
| 417 | merger.merge(context, getSyncingAccount(), diffs, result, syncResult, this); |
| 418 | } |
| 419 | if (mIsMergeCancelled) return; |
| 420 | if (diffs != null) { |
| 421 | mSyncState.copySyncState( |
| 422 | ((AbstractSyncableContentProvider)diffs).mOpenHelper.getReadableDatabase(), |
| 423 | mOpenHelper.getWritableDatabase(), |
| 424 | getSyncingAccount()); |
| 425 | } |
| 426 | } finally { |
| 427 | synchronized (this) { |
| 428 | mCurrentMerger = null; |
| 429 | } |
| 430 | } |
| 431 | db.setTransactionSuccessful(); |
| 432 | } finally { |
| 433 | db.endTransaction(); |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | |
| 438 | /** |
| 439 | * Invoked when the active sync has been canceled. Sets the sync state of this provider and |
| 440 | * its merger to canceled. |
| 441 | */ |
| 442 | public void onSyncCanceled() { |
| 443 | synchronized (this) { |
| 444 | mIsMergeCancelled = true; |
| 445 | if (mCurrentMerger != null) { |
| 446 | mCurrentMerger.onMergeCancelled(); |
| 447 | } |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | |
| 452 | public boolean isMergeCancelled() { |
| 453 | return mIsMergeCancelled; |
| 454 | } |
| 455 | |
| 456 | /** |
| 457 | * Subclasses should override this instead of update(). See update() |
| 458 | * for details. |
| 459 | * |
| 460 | * <p> This method is called within a acquireDbLock()/releaseDbLock() block, |
| 461 | * which means a database transaction will be active during the call; |
| 462 | */ |
| 463 | protected abstract int updateInternal(Uri url, ContentValues values, |
| 464 | String selection, String[] selectionArgs); |
| 465 | |
| 466 | /** |
| 467 | * Subclasses should override this instead of delete(). See delete() |
| 468 | * for details. |
| 469 | * |
| 470 | * <p> This method is called within a acquireDbLock()/releaseDbLock() block, |
| 471 | * which means a database transaction will be active during the call; |
| 472 | */ |
| 473 | protected abstract int deleteInternal(Uri url, String selection, String[] selectionArgs); |
| 474 | |
| 475 | /** |
| 476 | * Subclasses should override this instead of insert(). See insert() |
| 477 | * for details. |
| 478 | * |
| 479 | * <p> This method is called within a acquireDbLock()/releaseDbLock() block, |
| 480 | * which means a database transaction will be active during the call; |
| 481 | */ |
| 482 | protected abstract Uri insertInternal(Uri url, ContentValues values); |
| 483 | |
| 484 | /** |
| 485 | * Subclasses should override this instead of query(). See query() |
| 486 | * for details. |
| 487 | * |
| 488 | * <p> This method is *not* called within a acquireDbLock()/releaseDbLock() |
| 489 | * block for performance reasons. If an implementation needs atomic access |
| 490 | * to the database the lock can be acquired then. |
| 491 | */ |
| 492 | protected abstract Cursor queryInternal(Uri url, String[] projection, |
| 493 | String selection, String[] selectionArgs, String sortOrder); |
| 494 | |
| 495 | /** |
| 496 | * Make sure that there are no entries for accounts that no longer exist |
| 497 | * @param accountsArray the array of currently-existing accounts |
| 498 | */ |
| 499 | protected void onAccountsChanged(String[] accountsArray) { |
| 500 | Map<String, Boolean> accounts = new HashMap<String, Boolean>(); |
| 501 | for (String account : accountsArray) { |
| 502 | accounts.put(account, false); |
| 503 | } |
| 504 | accounts.put(SyncConstValue.NON_SYNCABLE_ACCOUNT, false); |
| 505 | |
| 506 | SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| 507 | Map<String, String> tableMap = db.getSyncedTables(); |
| 508 | Vector<String> tables = new Vector<String>(); |
| 509 | tables.addAll(tableMap.keySet()); |
| 510 | tables.addAll(tableMap.values()); |
| 511 | |
| 512 | db.beginTransaction(); |
| 513 | try { |
| 514 | mSyncState.onAccountsChanged(accountsArray); |
| 515 | for (String table : tables) { |
| 516 | deleteRowsForRemovedAccounts(accounts, table, |
| 517 | SyncConstValue._SYNC_ACCOUNT); |
| 518 | } |
| 519 | db.setTransactionSuccessful(); |
| 520 | } finally { |
| 521 | db.endTransaction(); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | /** |
| 526 | * A helper method to delete all rows whose account is not in the accounts |
| 527 | * map. The accountColumnName is the name of the column that is expected |
| 528 | * to hold the account. If a row has an empty account it is never deleted. |
| 529 | * |
| 530 | * @param accounts a map of existing accounts |
| 531 | * @param table the table to delete from |
| 532 | * @param accountColumnName the name of the column that is expected |
| 533 | * to hold the account. |
| 534 | */ |
| 535 | protected void deleteRowsForRemovedAccounts(Map<String, Boolean> accounts, |
| 536 | String table, String accountColumnName) { |
| 537 | SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| 538 | Cursor c = db.query(table, sAccountProjection, null, null, |
| 539 | accountColumnName, null, null); |
| 540 | try { |
| 541 | while (c.moveToNext()) { |
| 542 | String account = c.getString(0); |
| 543 | if (TextUtils.isEmpty(account)) { |
| 544 | continue; |
| 545 | } |
| 546 | if (!accounts.containsKey(account)) { |
| 547 | int numDeleted; |
| 548 | numDeleted = db.delete(table, accountColumnName + "=?", new String[]{account}); |
| 549 | if (Config.LOGV) { |
| 550 | Log.v(TAG, "deleted " + numDeleted |
| 551 | + " records from table " + table |
| 552 | + " for account " + account); |
| 553 | } |
| 554 | } |
| 555 | } |
| 556 | } finally { |
| 557 | c.close(); |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * Called when the sync system determines that this provider should no longer |
| 563 | * contain records for the specified account. |
| 564 | */ |
| 565 | public void wipeAccount(String account) { |
| 566 | SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| 567 | Map<String, String> tableMap = db.getSyncedTables(); |
| 568 | ArrayList<String> tables = new ArrayList<String>(); |
| 569 | tables.addAll(tableMap.keySet()); |
| 570 | tables.addAll(tableMap.values()); |
| 571 | |
| 572 | db.beginTransaction(); |
| 573 | |
| 574 | try { |
| 575 | // remove the SyncState data |
| 576 | mSyncState.discardSyncData(db, account); |
| 577 | |
| 578 | // remove the data in the synced tables |
| 579 | for (String table : tables) { |
| 580 | db.delete(table, SYNC_ACCOUNT_WHERE_CLAUSE, new String[]{account}); |
| 581 | } |
| 582 | db.setTransactionSuccessful(); |
| 583 | } finally { |
| 584 | db.endTransaction(); |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | /** |
| 589 | * Retrieves the SyncData bytes for the given account. The byte array returned may be null. |
| 590 | */ |
| 591 | public byte[] readSyncDataBytes(String account) { |
| 592 | return mSyncState.readSyncDataBytes(mOpenHelper.getReadableDatabase(), account); |
| 593 | } |
| 594 | |
| 595 | /** |
| 596 | * Sets the SyncData bytes for the given account. The byte array may be null. |
| 597 | */ |
| 598 | public void writeSyncDataBytes(String account, byte[] data) { |
| 599 | mSyncState.writeSyncDataBytes(mOpenHelper.getWritableDatabase(), account, data); |
| 600 | } |
| 601 | } |