82 lines
2.8 KiB
JavaScript
82 lines
2.8 KiB
JavaScript
|
"use strict";
|
||
|
|
var __extends = (this && this.__extends) || (function () {
|
||
|
|
var extendStatics = function (d, b) {
|
||
|
|
extendStatics = Object.setPrototypeOf ||
|
||
|
|
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
|
||
|
|
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
|
||
|
|
return extendStatics(d, b);
|
||
|
|
}
|
||
|
|
return function (d, b) {
|
||
|
|
extendStatics(d, b);
|
||
|
|
function __() { this.constructor = d; }
|
||
|
|
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
|
||
|
|
};
|
||
|
|
})();
|
||
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
||
|
|
var Subscriber_1 = require("../Subscriber");
|
||
|
|
var EmptyError_1 = require("../util/EmptyError");
|
||
|
|
function single(predicate) {
|
||
|
|
return function (source) { return source.lift(new SingleOperator(predicate, source)); };
|
||
|
|
}
|
||
|
|
exports.single = single;
|
||
|
|
var SingleOperator = (function () {
|
||
|
|
function SingleOperator(predicate, source) {
|
||
|
|
this.predicate = predicate;
|
||
|
|
this.source = source;
|
||
|
|
}
|
||
|
|
SingleOperator.prototype.call = function (subscriber, source) {
|
||
|
|
return source.subscribe(new SingleSubscriber(subscriber, this.predicate, this.source));
|
||
|
|
};
|
||
|
|
return SingleOperator;
|
||
|
|
}());
|
||
|
|
var SingleSubscriber = (function (_super) {
|
||
|
|
__extends(SingleSubscriber, _super);
|
||
|
|
function SingleSubscriber(destination, predicate, source) {
|
||
|
|
var _this = _super.call(this, destination) || this;
|
||
|
|
_this.predicate = predicate;
|
||
|
|
_this.source = source;
|
||
|
|
_this.seenValue = false;
|
||
|
|
_this.index = 0;
|
||
|
|
return _this;
|
||
|
|
}
|
||
|
|
SingleSubscriber.prototype.applySingleValue = function (value) {
|
||
|
|
if (this.seenValue) {
|
||
|
|
this.destination.error('Sequence contains more than one element');
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.seenValue = true;
|
||
|
|
this.singleValue = value;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
SingleSubscriber.prototype._next = function (value) {
|
||
|
|
var index = this.index++;
|
||
|
|
if (this.predicate) {
|
||
|
|
this.tryNext(value, index);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.applySingleValue(value);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
SingleSubscriber.prototype.tryNext = function (value, index) {
|
||
|
|
try {
|
||
|
|
if (this.predicate(value, index, this.source)) {
|
||
|
|
this.applySingleValue(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
this.destination.error(err);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
SingleSubscriber.prototype._complete = function () {
|
||
|
|
var destination = this.destination;
|
||
|
|
if (this.index > 0) {
|
||
|
|
destination.next(this.seenValue ? this.singleValue : undefined);
|
||
|
|
destination.complete();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
destination.error(new EmptyError_1.EmptyError);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
return SingleSubscriber;
|
||
|
|
}(Subscriber_1.Subscriber));
|
||
|
|
//# sourceMappingURL=single.js.map
|