var util = require('../util'); function JsonParser() { } JsonParser.prototype.parse = function(value, shape) { return translate(JSON.parse(value), shape); }; function translate(value, shape) { if (!shape || value === undefined) return undefined; switch (shape.type) { case 'structure': return translateStructure(value, shape); case 'map': return translateMap(value, shape); case 'list': return translateList(value, shape); default: return translateScalar(value, shape); } } function translateStructure(structure, shape) { if (structure == null) return undefined; var struct = {}; var shapeMembers = shape.members; util.each(shapeMembers, function(name, memberShape) { var locationName = memberShape.isLocationName ? memberShape.name : name; if (Object.prototype.hasOwnProperty.call(structure, locationName)) { var value = structure[locationName]; var result = translate(value, memberShape); if (result !== undefined) struct[name] = result; } }); return struct; } function translateList(list, shape) { if (list == null) return undefined; var out = []; util.arrayEach(list, function(value) { var result = translate(value, shape.member); if (result === undefined) out.push(null); else out.push(result); }); return out; } function translateMap(map, shape) { if (map == null) return undefined; var out = {}; util.each(map, function(key, value) { var result = translate(value, shape.value); if (result === undefined) out[key] = null; else out[key] = result; }); return out; } function translateScalar(value, shape) { return shape.toType(value); } /** * @api private */ module.exports = JsonParser;