webpack/lib/serialization/MapObjectSerializer.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
*/

"use strict";

/** @typedef {import("./ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("./ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */

class MapObjectSerializer {
	/**
	 * Serializes this instance into the provided serializer context.
	 * @template K, V
	 * @param {Map<K, V>} obj map
	 * @param {ObjectSerializerContext} context context
	 */
	serialize(obj, context) {
		context.write(obj.size);
		for (const key of obj.keys()) {
			context.write(key);
		}
		for (const value of obj.values()) {
			context.write(value);
		}
	}

	/**
	 * Restores this instance from the provided deserializer context.
	 * @template K, V
	 * @param {ObjectDeserializerContext} context context
	 * @returns {Map<K, V>} map
	 */
	deserialize(context) {
		/** @type {number} */
		const size = context.read();
		/** @type {Map<K, V>} */
		const map = new Map();
		/** @type {K[]} */
		const keys = [];
		for (let i = 0; i < size; i++) {
			keys.push(context.read());
		}
		for (let i = 0; i < size; i++) {
			map.set(keys[i], context.read());
		}
		return map;
	}
}

module.exports = MapObjectSerializer;