/** {@inheritDoc} */
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
Log.v("delete(uri=" + uri + ")");
final int match = getUriMatcher().match(uri);
switch (match) {
case RESOURCES_ID:
deleteResourceSideEffect(uri);
break;
case DOWNLOADS_ID:
deleteDownloadSideEffect(uri);
break;
default:
break;
}
final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
final SelectionBuilder builder = buildSimpleSelection(uri);
int retVal;
synchronized (mutex) {
retVal = builder.where(selection, selectionArgs).delete(db);
}
getContext().getContentResolver().notifyChange(uri, null);
return retVal;
}
/** {@inheritDoc} */
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
Log.v("update(uri=" + uri + ")");
final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
final SelectionBuilder builder = buildSimpleSelection(uri);
int rowsChanged;
synchronized (mutex) {
rowsChanged = builder.where(selection, selectionArgs).update(db, values);
}
getContext().getContentResolver().notifyChange(uri, null);
return rowsChanged;
}
@Override
public Cursor query(
Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
Log.v("query(uri=" + uri + ", proj=" + Arrays.toString(projection) + ")");
final SQLiteDatabase db = mOpenHelper.getReadableDatabase();
final int match = getUriMatcher().match(uri);
final SelectionBuilder builder = buildExpandedSelection(uri, match);
Cursor query;
synchronized (mutex) {
query = builder.where(selection, selectionArgs).query(db, projection, sortOrder);
}
query.setNotificationUri(getContext().getContentResolver(), uri);
return query;
}
/**
* Build a simple {@link SelectionBuilder} to match the requested {@link Uri}. This is usually
* enough to support {@link #insert}, {@link #update}, and {@link #delete} operations.
*/
private SelectionBuilder buildSimpleSelection(Uri uri) {
final SelectionBuilder builder = new SelectionBuilder();
final int match = getUriMatcher().match(uri);
switch (match) {
case FAVORITES_ID:
{
final String favoriteId = Favorites.getFavoriteId(uri);
return builder.table(Tables.FAVORITES).where(Favorites._ID + "=?", favoriteId);
}
case RESOURCES_ID:
{
final String resourceId = Resources.getResourceId(uri);
return builder.table(Tables.RESOURCES).where(Resources._ID + "=?", resourceId);
}
case DOWNLOADS_ID:
{
final String downloadId = Downloads.getDownloadId(uri);
return builder.table(Tables.DOWNLOADS).where(Downloads._ID + "=?", downloadId);
}
case DOWNLOADS:
{
return builder.table(Tables.DOWNLOADS);
}
case RESOURCES:
{
return builder.table(Tables.RESOURCES);
}
default:
{
throw new UnsupportedOperationException("Unknown uri( " + match + "): " + uri);
}
}
}
