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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 tryCatch_1 = require('../util/tryCatch');
var errorObject_1 = require('../util/errorObject');
var subscribeToResult_1 = require('../util/subscribeToResult');
var OuterSubscriber_1 = require('../OuterSubscriber');
/**
* Returns an Observable that emits items based on applying a function that you supply to each item emitted by the
* source Observable, where that function returns an Observable, and then merging those resulting Observables and
* emitting the results of this merger.
*
* <img src="./img/mergeMap.png" width="100%">
*
* @param {Function} a function that, when applied to an item emitted by the source Observable, returns an Observable.
* @returns {Observable} an Observable that emits the result of applying the transformation function to each item
* emitted by the source Observable and merging the results of the Observables obtained from this transformation
*/
function mergeMap(project, resultSelector, concurrent) {
if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }
return this.lift(new MergeMapOperator(project, resultSelector, concurrent));
}
exports.mergeMap = mergeMap;
var MergeMapOperator = (function () {
function MergeMapOperator(project, resultSelector, concurrent) {
Iif (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }
this.project = project;
this.resultSelector = resultSelector;
this.concurrent = concurrent;
}
MergeMapOperator.prototype.call = function (observer) {
return new MergeMapSubscriber(observer, this.project, this.resultSelector, this.concurrent);
};
return MergeMapOperator;
})();
exports.MergeMapOperator = MergeMapOperator;
var MergeMapSubscriber = (function (_super) {
__extends(MergeMapSubscriber, _super);
function MergeMapSubscriber(destination, project, resultSelector, concurrent) {
Iif (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }
_super.call(this, destination);
this.project = project;
this.resultSelector = resultSelector;
this.concurrent = concurrent;
this.hasCompleted = false;
this.buffer = [];
this.active = 0;
this.index = 0;
}
MergeMapSubscriber.prototype._next = function (value) {
if (this.active < this.concurrent) {
var index = this.index++;
var ish = tryCatch_1.tryCatch(this.project)(value, index);
var destination = this.destination;
if (ish === errorObject_1.errorObject) {
destination.error(errorObject_1.errorObject.e);
}
else {
this.active++;
this._innerSub(ish, value, index);
}
}
else {
this.buffer.push(value);
}
};
MergeMapSubscriber.prototype._innerSub = function (ish, value, index) {
this.add(subscribeToResult_1.subscribeToResult(this, ish, value, index));
};
MergeMapSubscriber.prototype._complete = function () {
this.hasCompleted = true;
if (this.active === 0 && this.buffer.length === 0) {
this.destination.complete();
}
};
MergeMapSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex) {
var _a = this, destination = _a.destination, resultSelector = _a.resultSelector;
if (resultSelector) {
var result = tryCatch_1.tryCatch(resultSelector)(outerValue, innerValue, outerIndex, innerIndex);
if (result === errorObject_1.errorObject) {
destination.error(errorObject_1.errorObject.e);
}
else {
destination.next(result);
}
}
else {
destination.next(innerValue);
}
};
MergeMapSubscriber.prototype.notifyComplete = function (innerSub) {
var buffer = this.buffer;
this.remove(innerSub);
this.active--;
if (buffer.length > 0) {
this._next(buffer.shift());
}
else if (this.active === 0 && this.hasCompleted) {
this.destination.complete();
}
};
return MergeMapSubscriber;
})(OuterSubscriber_1.OuterSubscriber);
exports.MergeMapSubscriber = MergeMapSubscriber;
//# sourceMappingURL=mergeMap.js.map |