| /* |
| ** Copyright 2006, 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 com.android.providers.subscribedfeeds; |
| |
| import android.content.UriMatcher; |
| import android.content.*; |
| import android.database.Cursor; |
| import android.database.DatabaseUtils; |
| import android.database.sqlite.SQLiteDatabase; |
| import android.database.sqlite.SQLiteQueryBuilder; |
| import android.net.Uri; |
| import android.provider.SubscribedFeeds; |
| import android.text.TextUtils; |
| import android.util.Config; |
| import android.util.Log; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.HashMap; |
| |
| /** |
| * Manages a list of feeds for which this client is interested in receiving |
| * change notifications. |
| */ |
| public class SubscribedFeedsProvider extends SyncableContentProvider { |
| private static final String TAG = "SubscribedFeedsProvider"; |
| private static final String DATABASE_NAME = "subscribedfeeds.db"; |
| private static final int DATABASE_VERSION = 10; |
| |
| private static final int FEEDS = 1; |
| private static final int FEED_ID = 2; |
| private static final int DELETED_FEEDS = 3; |
| private static final int ACCOUNTS = 4; |
| |
| private static final Map<String, String> ACCOUNTS_PROJECTION_MAP; |
| |
| private static final UriMatcher sURLMatcher = |
| new UriMatcher(UriMatcher.NO_MATCH); |
| |
| private static String sFeedsTable = "feeds"; |
| private static Uri sFeedsUrl = |
| Uri.parse("content://subscribedfeeds/feeds/"); |
| private static String sDeletedFeedsTable = "_deleted_feeds"; |
| private static Uri sDeletedFeedsUrl = |
| Uri.parse("content://subscribedfeeds/deleted_feeds/"); |
| |
| public SubscribedFeedsProvider() { |
| super(DATABASE_NAME, DATABASE_VERSION, sFeedsUrl); |
| } |
| |
| static { |
| sURLMatcher.addURI("subscribedfeeds", "feeds", FEEDS); |
| sURLMatcher.addURI("subscribedfeeds", "feeds/#", FEED_ID); |
| sURLMatcher.addURI("subscribedfeeds", "deleted_feeds", DELETED_FEEDS); |
| sURLMatcher.addURI("subscribedfeeds", "accounts", ACCOUNTS); |
| } |
| |
| @Override |
| protected boolean upgradeDatabase(SQLiteDatabase db, |
| int oldVersion, int newVersion) { |
| Log.w(TAG, "Upgrading database from version " + oldVersion + |
| " to " + newVersion + |
| ", which will destroy all old data"); |
| db.execSQL("DROP TRIGGER IF EXISTS feed_cleanup"); |
| db.execSQL("DROP TABLE IF EXISTS _deleted_feeds"); |
| db.execSQL("DROP TABLE IF EXISTS feeds"); |
| bootstrapDatabase(db); |
| return false; // this was lossy |
| } |
| |
| @Override |
| protected void bootstrapDatabase(SQLiteDatabase db) { |
| super.bootstrapDatabase(db); |
| db.execSQL("CREATE TABLE feeds (" + |
| "_id INTEGER PRIMARY KEY," + |
| "_sync_account TEXT," + // From the sync source |
| "_sync_id TEXT," + // From the sync source |
| "_sync_time TEXT," + // From the sync source |
| "_sync_version TEXT," + // From the sync source |
| "_sync_local_id INTEGER," + // Used while syncing, |
| // never stored persistently |
| "_sync_dirty INTEGER," + // if syncable, set if the record |
| // has local, unsynced, changes |
| "_sync_mark INTEGER," + // Used to filter out new rows |
| "feed TEXT," + |
| "authority TEXT," + |
| "service TEXT" + |
| ");"); |
| |
| // Trigger to completely remove feeds data when they're deleted |
| db.execSQL("CREATE TRIGGER feed_cleanup DELETE ON feeds " + |
| "WHEN old._sync_id is not null " + |
| "BEGIN " + |
| "INSERT INTO _deleted_feeds " + |
| "(_sync_id, _sync_account, _sync_version) " + |
| "VALUES (old._sync_id, old._sync_account, " + |
| "old._sync_version);" + |
| "END"); |
| |
| db.execSQL("CREATE TABLE _deleted_feeds (" + |
| "_sync_version TEXT," + // From the sync source |
| "_sync_id TEXT," + |
| "_sync_account TEXT," + |
| "_sync_mark INTEGER, " + // Used to filter out new rows |
| "UNIQUE(_sync_id))"); |
| } |
| |
| @Override |
| protected void onDatabaseOpened(SQLiteDatabase db) { |
| db.markTableSyncable("feeds", "_deleted_feeds"); |
| } |
| |
| @Override |
| protected Iterable<FeedMerger> getMergers() { |
| return Collections.singletonList(new FeedMerger()); |
| } |
| |
| @Override |
| public String getType(Uri url) { |
| int match = sURLMatcher.match(url); |
| switch (match) { |
| case FEEDS: |
| return SubscribedFeeds.Feeds.CONTENT_TYPE; |
| case FEED_ID: |
| return SubscribedFeeds.Feeds.CONTENT_ITEM_TYPE; |
| default: |
| throw new IllegalArgumentException("Unknown URL"); |
| } |
| } |
| |
| @Override |
| public Cursor queryInternal(Uri url, String[] projection, |
| String selection, String[] selectionArgs, String sortOrder) { |
| SQLiteQueryBuilder qb = new SQLiteQueryBuilder(); |
| |
| |
| // Generate the body of the query |
| int match = sURLMatcher.match(url); |
| |
| if (Config.LOGV) Log.v(TAG, "SubscribedFeedsProvider.query: url=" + |
| url + ", match is " + match); |
| |
| switch (match) { |
| case FEEDS: |
| qb.setTables(sFeedsTable); |
| break; |
| case DELETED_FEEDS: |
| if (!isTemporary()) { |
| throw new UnsupportedOperationException(); |
| } |
| qb.setTables(sDeletedFeedsTable); |
| break; |
| case ACCOUNTS: |
| qb.setTables(sFeedsTable); |
| qb.setDistinct(true); |
| qb.setProjectionMap(ACCOUNTS_PROJECTION_MAP); |
| return qb.query(getDatabase(), projection, selection, selectionArgs, |
| SubscribedFeeds.Feeds._SYNC_ACCOUNT, null, sortOrder); |
| case FEED_ID: |
| qb.setTables(sFeedsTable); |
| qb.appendWhere(sFeedsTable + "._id="); |
| qb.appendWhere(url.getPathSegments().get(1)); |
| break; |
| default: |
| throw new IllegalArgumentException("Unknown URL " + url); |
| } |
| |
| // run the query |
| return qb.query(getDatabase(), projection, selection, selectionArgs, |
| null, null, sortOrder); |
| } |
| |
| @Override |
| public Uri insertInternal(Uri url, ContentValues initialValues) { |
| final SQLiteDatabase db = getDatabase(); |
| Uri resultUri = null; |
| long rowID; |
| |
| int match = sURLMatcher.match(url); |
| switch (match) { |
| case FEEDS: |
| ContentValues values = new ContentValues(initialValues); |
| values.put(SubscribedFeeds.Feeds._SYNC_DIRTY, 1); |
| rowID = db.insert(sFeedsTable, "feed", values); |
| if (rowID > 0) { |
| resultUri = Uri.parse( |
| "content://subscribedfeeds/feeds/" + rowID); |
| } |
| break; |
| |
| case DELETED_FEEDS: |
| if (!isTemporary()) { |
| throw new UnsupportedOperationException(); |
| } |
| rowID = db.insert(sDeletedFeedsTable, "_sync_id", |
| initialValues); |
| if (rowID > 0) { |
| resultUri = Uri.parse( |
| "content://subscribedfeeds/deleted_feeds/" + rowID); |
| } |
| break; |
| |
| default: |
| throw new UnsupportedOperationException( |
| "Cannot insert into URL: " + url); |
| } |
| |
| return resultUri; |
| } |
| |
| @Override |
| public int deleteInternal(Uri url, String userWhere, String[] whereArgs) { |
| final SQLiteDatabase db = getDatabase(); |
| String changedItemId; |
| |
| switch (sURLMatcher.match(url)) { |
| case FEEDS: |
| changedItemId = null; |
| break; |
| case FEED_ID: |
| changedItemId = url.getPathSegments().get(1); |
| break; |
| default: |
| throw new UnsupportedOperationException( |
| "Cannot delete that URL: " + url); |
| } |
| |
| String where = addIdToWhereClause(changedItemId, userWhere); |
| return db.delete(sFeedsTable, where, whereArgs); |
| } |
| |
| @Override |
| public int updateInternal(Uri url, ContentValues initialValues, |
| String userWhere, String[] whereArgs) { |
| final SQLiteDatabase db = getDatabase(); |
| ContentValues values = new ContentValues(initialValues); |
| values.put(SubscribedFeeds.Feeds._SYNC_DIRTY, 1); |
| |
| String changedItemId; |
| switch (sURLMatcher.match(url)) { |
| case FEEDS: |
| changedItemId = null; |
| break; |
| |
| case FEED_ID: |
| changedItemId = url.getPathSegments().get(1); |
| break; |
| |
| default: |
| throw new UnsupportedOperationException( |
| "Cannot update URL: " + url); |
| } |
| |
| String where = addIdToWhereClause(changedItemId, userWhere); |
| return db.update(sFeedsTable, values, where, whereArgs); |
| } |
| |
| private static String addIdToWhereClause(String id, String where) { |
| if (id != null) { |
| StringBuilder whereSb = new StringBuilder("_id="); |
| whereSb.append(id); |
| if (!TextUtils.isEmpty(where)) { |
| whereSb.append(" AND ("); |
| whereSb.append(where); |
| whereSb.append(')'); |
| } |
| return whereSb.toString(); |
| } else { |
| return where; |
| } |
| } |
| |
| private class FeedMerger extends AbstractTableMerger { |
| private ContentValues mValues = new ContentValues(); |
| FeedMerger() { |
| super(getDatabase(), sFeedsTable, sFeedsUrl, sDeletedFeedsTable, sDeletedFeedsUrl); |
| } |
| |
| @Override |
| protected void notifyChanges() { |
| getContext().getContentResolver().notifyChange( |
| sFeedsUrl, null /* data change observer */, |
| false /* do not sync to network */); |
| } |
| |
| @Override |
| public void insertRow(ContentProvider diffs, Cursor diffsCursor) { |
| final SQLiteDatabase db = getDatabase(); |
| // We don't ever want to add entries from the server, instead |
| // we want to tell the server to delete any entries we receive |
| // from the server that aren't already known by the client. |
| mValues.clear(); |
| DatabaseUtils.cursorStringToContentValues(diffsCursor, |
| SubscribedFeeds.Feeds._SYNC_ID, mValues); |
| DatabaseUtils.cursorStringToContentValues(diffsCursor, |
| SubscribedFeeds.Feeds._SYNC_ACCOUNT, mValues); |
| DatabaseUtils.cursorStringToContentValues(diffsCursor, |
| SubscribedFeeds.Feeds._SYNC_VERSION, mValues); |
| db.replace(mDeletedTable, SubscribedFeeds.Feeds._SYNC_ID, mValues); |
| } |
| |
| @Override |
| public void updateRow(long localPersonID, ContentProvider diffs, |
| Cursor diffsCursor) { |
| updateOrResolveRow(localPersonID, null, diffs, diffsCursor, false); |
| } |
| |
| @Override |
| public void resolveRow(long localPersonID, String syncID, |
| ContentProvider diffs, Cursor diffsCursor) { |
| updateOrResolveRow(localPersonID, syncID, diffs, diffsCursor, true); |
| } |
| |
| protected void updateOrResolveRow(long localPersonID, String syncID, |
| ContentProvider diffs, Cursor diffsCursor, boolean conflicts) { |
| mValues.clear(); |
| // only copy over the fields that the server owns |
| DatabaseUtils.cursorStringToContentValues(diffsCursor, |
| SubscribedFeeds.Feeds._SYNC_ID, mValues); |
| DatabaseUtils.cursorStringToContentValues(diffsCursor, |
| SubscribedFeeds.Feeds._SYNC_TIME, mValues); |
| DatabaseUtils.cursorStringToContentValues(diffsCursor, |
| SubscribedFeeds.Feeds._SYNC_VERSION, mValues); |
| mValues.put(SubscribedFeeds.Feeds._SYNC_DIRTY, conflicts ? 1 : 0); |
| final SQLiteDatabase db = getDatabase(); |
| db.update(mTable, mValues, |
| SubscribedFeeds.Feeds._ID + '=' + localPersonID, null); |
| } |
| |
| @Override |
| public void deleteRow(Cursor localCursor) { |
| // Since the client is the authority we don't actually delete |
| // the row when the server says it has been deleted. Instead |
| // we break the association with the server by clearing out |
| // the id, time, and version, then we mark it dirty so that |
| // it will be synced back to the server. |
| long localPersonId = localCursor.getLong(localCursor.getColumnIndex( |
| SubscribedFeeds.Feeds._ID)); |
| mValues.clear(); |
| mValues.put(SubscribedFeeds.Feeds._SYNC_DIRTY, 1); |
| mValues.put(SubscribedFeeds.Feeds._SYNC_ID, (String) null); |
| mValues.put(SubscribedFeeds.Feeds._SYNC_TIME, (Long) null); |
| mValues.put(SubscribedFeeds.Feeds._SYNC_VERSION, (String) null); |
| final SQLiteDatabase db = getDatabase(); |
| db.update(mTable, mValues, SubscribedFeeds.Feeds._ID + '=' + localPersonId, null); |
| localCursor.moveToNext(); |
| } |
| } |
| |
| static { |
| Map<String, String> map; |
| |
| map = new HashMap<String, String>(); |
| ACCOUNTS_PROJECTION_MAP = map; |
| map.put(SubscribedFeeds.Accounts._COUNT, "COUNT(*) AS _count"); |
| map.put(SubscribedFeeds.Accounts._SYNC_ACCOUNT, SubscribedFeeds.Accounts._SYNC_ACCOUNT); |
| } |
| } |