72 lines
1.5 KiB
JavaScript
72 lines
1.5 KiB
JavaScript
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var util = require('../core').util;
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var typeOf = require('./types').typeOf;
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/**
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* @api private
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*/
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var memberTypeToSetType = {
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'String': 'String',
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'Number': 'Number',
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'NumberValue': 'Number',
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'Binary': 'Binary'
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};
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/**
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* @api private
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*/
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var DynamoDBSet = util.inherit({
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constructor: function Set(list, options) {
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options = options || {};
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this.wrapperName = 'Set';
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this.initialize(list, options.validate);
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},
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initialize: function(list, validate) {
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var self = this;
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self.values = [].concat(list);
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self.detectType();
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if (validate) {
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self.validate();
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}
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},
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detectType: function() {
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this.type = memberTypeToSetType[typeOf(this.values[0])];
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if (!this.type) {
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throw util.error(new Error(), {
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code: 'InvalidSetType',
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message: 'Sets can contain string, number, or binary values'
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});
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}
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},
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validate: function() {
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var self = this;
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var length = self.values.length;
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var values = self.values;
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for (var i = 0; i < length; i++) {
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if (memberTypeToSetType[typeOf(values[i])] !== self.type) {
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throw util.error(new Error(), {
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code: 'InvalidType',
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message: self.type + ' Set contains ' + typeOf(values[i]) + ' value'
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});
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}
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}
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},
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/**
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* Render the underlying values only when converting to JSON.
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*/
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toJSON: function() {
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var self = this;
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return self.values;
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}
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});
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/**
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* @api private
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*/
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module.exports = DynamoDBSet;
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