50 lines
915 B
JavaScript
50 lines
915 B
JavaScript
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/**
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* Constants
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*/
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const STRING = 'string';
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const NUMBER = 'number';
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const FUNCTION = 'function';
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export class Metadata {
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/**
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* Constructor and Instance Methods
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*/
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constructor(data) {
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this._data = data;
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}
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getData() {
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return this._data;
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}
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getDataProperty(propertyName) {
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let propertyValue;
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const _data = this._data;
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if (_data instanceof Object || typeof _data === 'object' && _data !== null) {
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propertyValue = _data[propertyName];
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}
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return propertyValue;
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}
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/**
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* Static Methods
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*/
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static isValidUID(uid) {
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return typeof uid === STRING && uid.length > 0;
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}
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static isValidIndex(index) {
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return typeof index === NUMBER && index >= 0 && (index | 0) === index;
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}
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static isValidCallback(callback) {
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return typeof callback === FUNCTION;
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}
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}
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