webpack/lib/Generator.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support 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
	Author Tobias Koppers @sokra
*/
"use strict";

/** @typedef {import("./NormalModule")} NormalModule */
/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("./Dependency").DependencyTemplate} DependencyTemplate */

/**
 *
 */
class Generator {
	static byType(map) {
		return new ByTypeGenerator(map);
	}

	/**
	 * @abstract
	 * @param {NormalModule} module module for which the code should be generated
	 * @param {Map<Function, DependencyTemplate>} dependencyTemplates mapping from dependencies to templates
	 * @param {RuntimeTemplate} runtimeTemplate the runtime template
	 * @param {string} type which kind of code should be generated
	 * @returns {Source} generated code
	 */
	generate(module, dependencyTemplates, runtimeTemplate, type) {
		throw new Error("Generator.generate: must be overridden");
	}
}

class ByTypeGenerator extends Generator {
	constructor(map) {
		super();
		this.map = map;
	}

	/**
	 * @param {NormalModule} module module for which the code should be generated
	 * @param {Map<Function, DependencyTemplate>} dependencyTemplates mapping from dependencies to templates
	 * @param {RuntimeTemplate} runtimeTemplate the runtime template
	 * @param {string} type which kind of code should be generated
	 * @returns {Source} generated code
	 */
	generate(module, dependencyTemplates, runtimeTemplate, type) {
		const generator = this.map[type];
		if (!generator) {
			throw new Error(`Generator.byType: no generator specified for ${type}`);
		}
		return generator.generate(
			module,
			dependencyTemplates,
			runtimeTemplate,
			type
		);
	}
}

module.exports = Generator;