| // Copyright 2009 The Closure Library Authors. All Rights Reserved. |
| // |
| // 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. |
| |
| /** |
| * @fileoverview Base class for all PB2 lazy deserializer. A lazy deserializer |
| * is a serializer whose deserialization occurs on the fly as data is |
| * requested. In order to use a lazy deserializer, the serialized form |
| * of the data must be an object or array that can be indexed by the tag |
| * number. |
| * |
| */ |
| |
| goog.provide('goog.proto2.LazyDeserializer'); |
| |
| goog.require('goog.asserts'); |
| goog.require('goog.proto2.Message'); |
| goog.require('goog.proto2.Serializer'); |
| |
| |
| |
| /** |
| * Base class for all lazy deserializers. |
| * |
| * @constructor |
| * @extends {goog.proto2.Serializer} |
| */ |
| goog.proto2.LazyDeserializer = function() {}; |
| goog.inherits(goog.proto2.LazyDeserializer, goog.proto2.Serializer); |
| |
| |
| /** @override */ |
| goog.proto2.LazyDeserializer.prototype.deserialize = |
| function(descriptor, data) { |
| var message = descriptor.createMessageInstance(); |
| message.initializeForLazyDeserializer(this, data); |
| goog.asserts.assert(message instanceof goog.proto2.Message); |
| return message; |
| }; |
| |
| |
| /** @override */ |
| goog.proto2.LazyDeserializer.prototype.deserializeTo = function(message, data) { |
| throw new Error('Unimplemented'); |
| }; |
| |
| |
| /** |
| * Deserializes a message field from the expected format and places the |
| * data in the given message |
| * |
| * @param {goog.proto2.Message} message The message in which to |
| * place the information. |
| * @param {goog.proto2.FieldDescriptor} field The field for which to set the |
| * message value. |
| * @param {*} data The serialized data for the field. |
| * |
| * @return {*} The deserialized data or null for no value found. |
| */ |
| goog.proto2.LazyDeserializer.prototype.deserializeField = goog.abstractMethod; |