jsr/dist/index.js

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

class JSResourceImpl {
    constructor(loader) {
        this._loader = loader;
        this._result = null;
        this._error = null;
        this._promise = null;
    }
    load() {
        let promise = this._promise;
        if (promise == null) {
            promise = this._loader().then((result) => {
                this._result = result;
                return result;
            }, (error) => {
                this._error = error;
                throw error;
            });
            this._promise = promise;
        }
        return promise;
    }
    get() {
        if (this._result != null) {
            return this._result;
        }
        return undefined;
    }
    getModuleIfRequired() {
        return this.get();
    }
    read() {
        if (this._result != null) {
            return this._result;
        }
        else if (this._error != null) {
            throw this._error;
        }
        else {
            throw this._promise;
        }
    }
}
const resourceMap = new Map();
function JSResource(moduleId, loader) {
    let resource = resourceMap.get(moduleId);
    if (resource == null) {
        resource = new JSResourceImpl(loader);
        resourceMap.set(moduleId, resource);
    }
    return resource;
}

exports.JSResource = JSResource;