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(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Optional=f()}})(function(){var define,module,exports;return function(){function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}return e}()({1:[function(require,module,exports){var Optional=require("./lib/optional.js");module.exports={empty:function empty(){return new Optional},of:function of(value){if(value===undefined||value===null){throw new Error("value is not defined")}return new Optional(value)},ofNullable:function ofNullable(value){return new Optional(value)}}},{"./lib/optional.js":2}],2:[function(require,module,exports){function Optional(value){this._value=value}Optional.prototype={get:function get(){if(isNull(this._value)){throw new Error("optional is empty")}return this._value},isPresent:function isPresent(){return!isNull(this._value)},ifPresent:function ifPresent(consumer){if(!isNull(this._value)){if(!isFunction(consumer)){throw new Error("consumer is not a function")}consumer(this._value)}},filter:function filter(predicate){if(!isFunction(predicate)){throw new Error("predicate is not a function")}if(!isNull(this._value)&&predicate(this._value)){return new Optional(this._value)}return new Optional},map:function map(mapper){var mappedValue;if(!isFunction(mapper)){throw new Error("mapper is not a function")}if(isNull(this._value)){return new Optional}mappedValue=mapper(this._value);return isNull(mappedValue)?new Optional:new Optional(mappedValue)},flatMap:function flatMap(mapper){var flatMappedValue;if(!isFunction(mapper)){throw new Error("mapper is not a function")}if(isNull(this._value)){return new Optional}flatMappedValue=mapper(this._value);if(isNull(flatMappedValue)||isNull(flatMappedValue.get)){throw new Error("mapper does not return an Optional")}return flatMappedValue},peek:function peek(peeker){if(!isFunction(peeker)){throw new Error("peeker is not a function")}if(isNull(this._value)){return new Optional}peeker(this._value);return new Optional(this._value)},orElse:function orElse(other){return isNull(this._value)?other:this._value},orElseGet:function orElseGet(supplier){if(!isFunction(supplier)){throw new Error("supplier is not a function")}if(isNull(this._value)){return supplier()}else{return this._value}},orElseThrow:function orElseThrow(exceptionSupplier){if(isNull(this._value)){if(!isFunction(exceptionSupplier)){throw new Error("exception provider is not a function")}throw exceptionSupplier()}return this._value},ifPresentOrElse:function ifPresentOrElse(action,emptyAction){if(!isNull(this._value)){if(!isFunction(action)){throw new Error("action is not a function")}action(this._value)}else{if(!isFunction(emptyAction)){throw new Error("emptyAction is not a function")}emptyAction()}},or:function or(optionalSupplier){if(isNull(this._value)){if(!isFunction(optionalSupplier)){throw new Error("optionalSupplier is not a function")}return optionalSupplier()}return this},hashCode:function hashMap(){return-1}};function isNull(value){return value===undefined||value===null}function isFunction(value){return typeof value==="function"}module.exports=Optional},{}]},{},[1])(1)});