blois@google.com
cb8af97da5
A type check for the Stream<Cursor> was failing on Dartium. Basically the helper method is intended to work for both Cursor and CursorWithValue, but it was creating a StreamController<Cursor>. Just removed the type so it works acceptably with both. BUG= Review URL: https://codereview.chromium.org//12258022 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@18486 260f80e4-7a28-3924-810f-c04153c831b5
110 lines
3.2 KiB
Plaintext
110 lines
3.2 KiB
Plaintext
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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part of $LIBRARYNAME;
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$(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
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@DomName('IDBObjectStore.put')
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Future put(value, [key]) {
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try {
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var request;
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if (key != null) {
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request = $dom_put(value, key);
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} else {
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request = $dom_put(value);
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}
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return _completeRequest(request);
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} catch (e, stacktrace) {
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return new Future.immediateError(e, stacktrace);
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}
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}
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@DomName('IDBObjectStore.getObject')
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Future getObject(key) {
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try {
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var request = $dom_getObject(key);
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return _completeRequest(request);
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} catch (e, stacktrace) {
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return new Future.immediateError(e, stacktrace);
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}
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}
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/**
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* Creates a stream of cursors over the records in this object store.
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*
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* **The stream must be manually advanced by calling [Cursor.next] after
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* each item or by specifying autoAdvance to be true.**
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*
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* var cursors = objectStore.openCursor().listen(
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* (cursor) {
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* // ...some processing with the cursor
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* cursor.next(); // advance onto the next cursor.
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* },
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* onDone: () {
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* // called when there are no more cursors.
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* print('all done!');
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* });
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*
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* Asynchronous operations which are not related to the current transaction
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* will cause the transaction to automatically be committed-- all processing
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* must be done synchronously unless they are additional async requests to
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* the current transaction.
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*/
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@DomName('IDBObjectStore.openCursor')
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Stream<CursorWithValue> openCursor({key, KeyRange range, String direction,
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bool autoAdvance}) {
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var key_OR_range = null;
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if (key != null) {
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if (range != null) {
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throw new ArgumentError('Cannot specify both key and range.');
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}
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key_OR_range = key;
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} else {
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key_OR_range = range;
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}
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// TODO: try/catch this and return a stream with an immediate error.
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var request;
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if (direction == null) {
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request = $dom_openCursor(key_OR_range);
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} else {
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request = $dom_openCursor(key_OR_range, direction);
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}
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return _cursorStreamFromResult(request, autoAdvance);
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}
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$!MEMBERS
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/**
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* Helper for iterating over cursors in a request.
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*/
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static Stream<Cursor> _cursorStreamFromResult(Request request,
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bool autoAdvance) {
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// TODO: need to guarantee that the controller provides the values
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// immediately as waiting until the next tick will cause the transaction to
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// close.
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var controller = new StreamController();
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request.onError.listen((e) {
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//TODO: Report stacktrace once issue 4061 is resolved.
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controller.signalError(e);
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});
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request.onSuccess.listen((e) {
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Cursor cursor = request.result;
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if (cursor == null) {
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controller.close();
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} else {
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controller.add(cursor);
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if (autoAdvance == true) {
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cursor.next();
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}
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}
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});
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return controller.stream;
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}
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}
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