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