70 lines
1.9 KiB
JavaScript
70 lines
1.9 KiB
JavaScript
// Copyright 2007 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview Protocol buffer serializer.
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* @author arv@google.com (Erik Arvidsson)
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*/
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// TODO(arv): Serialize booleans as 0 and 1
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goog.provide('goog.proto.Serializer');
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goog.require('goog.json.Serializer');
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goog.require('goog.string');
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/**
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* Object that can serialize objects or values to a protocol buffer string.
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* @constructor
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* @extends {goog.json.Serializer}
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*/
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goog.proto.Serializer = function() {
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goog.json.Serializer.call(this);
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};
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goog.inherits(goog.proto.Serializer, goog.json.Serializer);
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/**
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* Serializes an array to a protocol buffer string. This overrides the JSON
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* method to output empty slots when the value is null or undefined.
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* @param {Array} arr The array to serialize.
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* @param {Array} sb Array used as a string builder.
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* @override
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*/
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goog.proto.Serializer.prototype.serializeArray = function(arr, sb) {
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var l = arr.length;
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sb.push('[');
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var emptySlots = 0;
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var sep = '';
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for (var i = 0; i < l; i++) {
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if (arr[i] == null) { // catches undefined as well
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emptySlots++;
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} else {
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if (emptySlots > 0) {
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sb.push(goog.string.repeat(',', emptySlots));
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emptySlots = 0;
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}
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sb.push(sep);
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this.serialize_(arr[i], sb);
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sep = ',';
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}
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}
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sb.push(']');
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};
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