@pujansrt/data-genie/dist/transformers/transforming-reader.js

High performant ETL engine written in TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TransformingReader = void 0;
const transformers_1 = require("./transformers");
class TransformingReader extends transformers_1.DataTransformer {
    constructor(reader) {
        super(reader);
        this.transformations = [];
        this.condition = () => true; // Default to always true
    }
    add(transformation) {
        this.transformations.push(transformation);
        return this;
    }
    setCondition(condition) {
        this.condition = condition;
        return this;
    }
    async *read() {
        for await (let record of this.reader.read()) {
            if (this.condition(record)) {
                for (const transform of this.transformations) {
                    record = transform(record);
                }
            }
            yield record;
        }
    }
}
exports.TransformingReader = TransformingReader;