Code coverage report for cjs/operator/single.js

Statements: 100% (51 / 51)      Branches: 89.47% (17 / 19)      Functions: 100% (11 / 11)      Lines: 100% (48 / 48)      Ignored: none     

All files » cjs/operator/ » single.js
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var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) Eif (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var Subscriber_1 = require('../Subscriber');
var tryCatch_1 = require('../util/tryCatch');
var errorObject_1 = require('../util/errorObject');
var EmptyError_1 = require('../util/EmptyError');
/**
 * Returns an Observable that emits the single item emitted by the source Observable that matches a specified
 * predicate, if that Observable emits one such item. If the source Observable emits more than one such item or no
 * such items, notify of an IllegalArgumentException or NoSuchElementException respectively.
 *
 * <img src="./img/single.png" width="100%">
 *
 * @param {Function} a predicate function to evaluate items emitted by the source Observable.
 * @returns {Observable<T>} an Observable that emits the single item emitted by the source Observable that matches
 * the predicate.
 .
 */
function single(predicate) {
    return this.lift(new SingleOperator(predicate, this));
}
exports.single = single;
var SingleOperator = (function () {
    function SingleOperator(predicate, source) {
        this.predicate = predicate;
        this.source = source;
    }
    SingleOperator.prototype.call = function (subscriber) {
        return new SingleSubscriber(subscriber, this.predicate, this.source);
    };
    return SingleOperator;
})();
var SingleSubscriber = (function (_super) {
    __extends(SingleSubscriber, _super);
    function SingleSubscriber(destination, predicate, source) {
        _super.call(this, destination);
        this.predicate = predicate;
        this.source = source;
        this.seenValue = false;
        this.index = 0;
    }
    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 predicate = this.predicate;
        var currentIndex = this.index++;
        if (predicate) {
            var result = tryCatch_1.tryCatch(predicate)(value, currentIndex, this.source);
            if (result === errorObject_1.errorObject) {
                this.destination.error(errorObject_1.errorObject.e);
            }
            else if (result) {
                this.applySingleValue(value);
            }
        }
        else {
            this.applySingleValue(value);
        }
    };
    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