vitamin/lib/registry.js

Data Mapper library for Node.js applications

"use strict";

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

var mappers = {};
var connections = {};

// exports
exports.default = {

  /**
   * Register a connection object
   *
   * @param {String} name
   * @param {Object} object
   * @return connection
   */
  connection: function connection() {
    var name = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'default';
    var object = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;

    name = name.toLowerCase();

    if (object != null) {
      if (connections[name]) throw new Error(name + " connection is already defined");

      connections[name] = object;
    }

    if (!connections[name]) throw new Error(name + " connection is not yet defined");

    return connections[name];
  },


  /**
   * Set a mapper in the registry
   *
   * @param {String} name
   * @param {Mapper} mapper
   * @return mapper
   */
  set: function set(name, mapper) {
    if (this.has(name)) throw new Error(name + " is already defined in the registry");

    return mappers[mapper.name = name.toLowerCase()] = mapper;
  },


  /**
   * Get the mapper by name
   *
   * @param {String} name
   * @return mapper
   */
  get: function get(name) {
    if (!this.has(name)) throw new Error(name + " is not defined in the registry");

    return mappers[name.toLowerCase()];
  },


  /**
   * Determine if the mapper name exists in the registry
   *
   * @param {String} name
   * @return boolean
   */
  has: function has(name) {
    return !!mappers[name.toLowerCase()];
  }
};