pip-services4-components-node/src/config/OptionResolver.ts

Portable Component Model in Node.js / ES2017

/** @module config */
import { ConfigParams } from './ConfigParams';

/**
 * A helper class to parameters from "options" configuration section.
 * 
 * ### Example ###
 * 
 *     let config = ConfigParams.fromTuples(
 *         ...
 *         "options.param1", "ABC",
 *         "options.param2", 123
 *     );
 *     
 *     let options = OptionsResolver.resolve(config); // Result: param1=ABC;param2=123 
 */
export class OptionResolver {

    /**
     * Resolves an "options" configuration section from component configuration parameters.
     * 
     * @param config            configuration parameters
     * @param configAsDefault   (optional) When set true the method returns the entire parameter set when "options" section is not found. Default: false
     * @returns                 configuration parameters from "options" section
     */
    static resolve(config: ConfigParams, configAsDefault = false): ConfigParams {
        let options = config.getSection("options");

        if (Object.keys(options).length == 0 && configAsDefault)  {
            options = config;
        }

        return options;
    }
}