/**
* @license
* Copyright The Closure Library Authors.
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @fileoverview Utility to attempt native JSON processing, falling back to
* goog.json if not available.
*
* This is intended as a drop-in for current users of goog.json who want
* to take advantage of native JSON if present.
*/
goog.provide('goog.json.hybrid');
goog.require('goog.asserts');
goog.require('goog.json');
/**
* Attempts to serialize the JSON string natively, falling back to
* `goog.json.serialize` if unsuccessful.
* @param {!Object} obj JavaScript object to serialize to JSON.
* @return {string} Resulting JSON string.
*/
goog.json.hybrid.stringify = goog.json.USE_NATIVE_JSON ?
goog.global['JSON']['stringify'] :
function(obj) {
'use strict';
if (goog.global.JSON) {
try {
return goog.global.JSON.stringify(obj);
} catch (e) {
// Native serialization failed. Fall through to retry with
// goog.json.serialize.
}
}
return goog.json.serialize(obj);
};
/**
* Attempts to parse the JSON string natively, falling back to
* the supplied `fallbackParser` if unsuccessful.
* @param {string} jsonString JSON string to parse.
* @param {function(string):Object} fallbackParser Fallback JSON parser used
* if native
* @return {?Object} Resulting JSON object.
* @private
*/
goog.json.hybrid.parse_ = function(jsonString, fallbackParser) {
'use strict';
if (goog.global.JSON) {
try {
var obj = goog.global.JSON.parse(jsonString);
goog.asserts.assert(typeof obj == 'object');
return /** @type {?Object} */ (obj);
} catch (e) {
// Native parse failed. Fall through to retry with goog.json.parse.
}
}
return fallbackParser(jsonString);
};
/**
* Attempts to parse the JSON string natively, falling back to
* `goog.json.parse` if unsuccessful.
* @param {string} jsonString JSON string to parse.
* @return {?Object} Resulting JSON object.
*/
goog.json.hybrid.parse = goog.json.USE_NATIVE_JSON ?
goog.global['JSON']['parse'] :
function(jsonString) {
'use strict';
return goog.json.hybrid.parse_(jsonString, goog.json.parse);
};