ts-ioc-container/esm/provider/SingletonProvider.js

Typescript IoC container

import { ProviderDecorator } from './IProvider';
import { SingleCache } from './Cache';
import { registerPipe } from './ProviderPipe';
export class SingletonProvider extends ProviderDecorator {
    provider;
    cache;
    constructor(provider, cache) {
        super(provider);
        this.provider = provider;
        this.cache = cache;
    }
    resolve(container, options) {
        const key = this.cache.getKey(...options.args);
        if (!this.cache.hasValue(key)) {
            this.cache.setValue(key, this.provider.resolve(container, options));
        }
        return this.cache.getValue(key);
    }
}
export const singleton = (cacheProvider) => registerPipe((p) => new SingletonProvider(p, cacheProvider ? cacheProvider() : new SingleCache()));