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// Throwable.js |
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"use strict"; |
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// :: BASIC SETUP |
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/** |
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* The <tt>Throwable</tt> class is the superclass of all errors and exceptions. |
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* @param {String} name - The name of the thrown object. |
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* @param {String} message - The message describing the thrown object. |
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* @param {Number} code - The unique code that identifies the cause of the thrown object. |
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* @augments Object |
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* @constructor |
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* @see https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html |
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*/ |
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const Throwable = function (name, message, code) { |
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// call the 'parent class' |
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12952 |
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Object.call(this); |
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// check parameter 'name' |
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12952 |
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if (name !== null && name !== undefined) { |
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if (typeof name !== "string") { |
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throw new Error("parameter 'name' must be a 'string'"); |
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} |
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this.name = name; |
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} |
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// check parameter 'message' |
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if (message !== null && message !== undefined) { |
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if (typeof message !== "string") { |
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throw new Error("parameter 'message' must be a 'string'"); |
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} |
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this.message = message; |
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} |
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// check parameter 'code' |
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if (code !== null && code !== undefined) { |
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if (typeof code !== "number") { |
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throw new Error("parameter 'code' must be a 'number'"); |
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} |
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this.code = code; |
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} |
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}; |
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// :: INHERITANCE |
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// set the prototype chain parent to 'Object' |
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Throwable.prototype = Object.create(Object.prototype); |
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// set the prototype chain constructor |
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Throwable.prototype.constructor = Throwable; |
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// :: PROTOTYPE |
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/** |
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* The name used to identify a thrown object. |
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* @type {String} |
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* @default |
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*/ |
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Throwable.prototype.name = "Throwable"; |
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/** |
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* The description of the cause of the thrown object. |
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* @type {String} |
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* @default |
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*/ |
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Throwable.prototype.message = "thrown"; |
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/** |
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* A short code that helps identifying a thrown object. |
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* @type {Number} |
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* @default |
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*/ |
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Throwable.prototype.code = null; |
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/** |
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* Gets the string representation of the {@linkcode Throwable} instance. |
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* @returns {String} The string representation of the thrown object. |
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* @override |
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*/ |
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Throwable.prototype.toString = function () { |
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let str = this.name; |
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if (this.code !== null && this.code !== undefined) { |
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str += " (0x" + this.code.toString(16) + ')'; |
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} |
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str += ": " + this.message + '.'; |
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return str; |
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}; |
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/** |
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* Throws an <tt>Error</tt> with the message of the {@linkcode Throwable} instance. |
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* @return {Error} The <tt>Error</tt> instance with the same message as the thrown object. |
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* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error |
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*/ |
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Throwable.prototype.native = function () { |
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return new Error(this.message); |
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}; |
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// :: EXPORT |
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// export the Throwable 'class' |
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module.exports = Throwable; |
EgaLabs /
node-ejsception
