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// Copyright 2007 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 Protocol buffer serializer.
* @author arv@google.com (Erik Arvidsson)
*/
// TODO(arv): Serialize booleans as 0 and 1
goog.provide('goog.proto.Serializer');
goog.require('goog.json.Serializer');
goog.require('goog.string');
/**
* Object that can serialize objects or values to a protocol buffer string.
* @constructor
* @extends {goog.json.Serializer}
*/
goog.proto.Serializer = function() {
goog.json.Serializer.call(this);
};
goog.inherits(goog.proto.Serializer, goog.json.Serializer);
/**
* Serializes an array to a protocol buffer string. This overrides the JSON
* method to output empty slots when the value is null or undefined.
* @param {Array} arr The array to serialize.
* @param {Array} sb Array used as a string builder.
* @override
*/
goog.proto.Serializer.prototype.serializeArray = function(arr, sb) {
var l = arr.length;
sb.push('[');
var emptySlots = 0;
var sep = '';
for (var i = 0; i < l; i++) {
if (arr[i] == null) { // catches undefined as well
emptySlots++;
} else {
if (emptySlots > 0) {
sb.push(goog.string.repeat(',', emptySlots));
emptySlots = 0;
}
sb.push(sep);
this.serialize_(arr[i], sb);
sep = ',';
}
}
sb.push(']');
};
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