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throwIfEmpty.js 2.3KB

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  1. "use strict";
  2. var __extends = (this && this.__extends) || (function () {
  3. var extendStatics = function (d, b) {
  4. extendStatics = Object.setPrototypeOf ||
  5. ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
  6. function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
  7. return extendStatics(d, b);
  8. }
  9. return function (d, b) {
  10. extendStatics(d, b);
  11. function __() { this.constructor = d; }
  12. d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  13. };
  14. })();
  15. Object.defineProperty(exports, "__esModule", { value: true });
  16. var EmptyError_1 = require("../util/EmptyError");
  17. var Subscriber_1 = require("../Subscriber");
  18. function throwIfEmpty(errorFactory) {
  19. if (errorFactory === void 0) { errorFactory = defaultErrorFactory; }
  20. return function (source) {
  21. return source.lift(new ThrowIfEmptyOperator(errorFactory));
  22. };
  23. }
  24. exports.throwIfEmpty = throwIfEmpty;
  25. var ThrowIfEmptyOperator = (function () {
  26. function ThrowIfEmptyOperator(errorFactory) {
  27. this.errorFactory = errorFactory;
  28. }
  29. ThrowIfEmptyOperator.prototype.call = function (subscriber, source) {
  30. return source.subscribe(new ThrowIfEmptySubscriber(subscriber, this.errorFactory));
  31. };
  32. return ThrowIfEmptyOperator;
  33. }());
  34. var ThrowIfEmptySubscriber = (function (_super) {
  35. __extends(ThrowIfEmptySubscriber, _super);
  36. function ThrowIfEmptySubscriber(destination, errorFactory) {
  37. var _this = _super.call(this, destination) || this;
  38. _this.errorFactory = errorFactory;
  39. _this.hasValue = false;
  40. return _this;
  41. }
  42. ThrowIfEmptySubscriber.prototype._next = function (value) {
  43. this.hasValue = true;
  44. this.destination.next(value);
  45. };
  46. ThrowIfEmptySubscriber.prototype._complete = function () {
  47. if (!this.hasValue) {
  48. var err = void 0;
  49. try {
  50. err = this.errorFactory();
  51. }
  52. catch (e) {
  53. err = e;
  54. }
  55. this.destination.error(err);
  56. }
  57. else {
  58. return this.destination.complete();
  59. }
  60. };
  61. return ThrowIfEmptySubscriber;
  62. }(Subscriber_1.Subscriber));
  63. function defaultErrorFactory() {
  64. return new EmptyError_1.EmptyError();
  65. }
  66. //# sourceMappingURL=throwIfEmpty.js.map