data-collectors/lib/transformers/flatMapping.js

A collection of composable reduction operations for arbitrary streams of values

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const collector_1 = require("../collector");
const toArray_1 = require("../collections/toArray");
class FlatMappingCollector extends collector_1.BaseCollector {
    constructor(mapper, collector) {
        super();
        this.mapper = mapper;
        this.collector = collector;
    }
    supply() {
        return this.collector.supply();
    }
    accumulate(container, item) {
        for (let subItem of this.mapper(item)) {
            this.collector.accumulate(container, subItem);
        }
    }
    combine(container1, container2) {
        return this.collector.combine(container1, container2);
    }
    finish(container) {
        return this.collector.finish(container);
    }
}
exports.FlatMappingCollector = FlatMappingCollector;
function flatMapping(mapper, collector) {
    return new FlatMappingCollector(mapper, collector || toArray_1.toArray());
}
exports.flatMapping = flatMapping;
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