@openhps/core/dist/esm/three/renderers/common/DataMap.js

Open Hybrid Positioning System - Core component

/**
 * Data structure for the renderer. It is intended to manage
 * data of objects in dictionaries.
 *
 * @private
 */
class DataMap {
  /**
   * Constructs a new data map.
   */
  constructor() {
    /**
     * `DataMap` internally uses a weak map
     * to manage its data.
     *
     * @type {WeakMap}
     */
    this.data = new WeakMap();
  }

  /**
   * Returns the dictionary for the given object.
   *
   * @param {Object} object - The object.
   * @return {Object} The dictionary.
   */
  get(object) {
    let map = this.data.get(object);
    if (map === undefined) {
      map = {};
      this.data.set(object, map);
    }
    return map;
  }

  /**
   * Deletes the dictionary for the given object.
   *
   * @param {Object} object - The object.
   * @return {?Object} The deleted dictionary.
   */
  delete(object) {
    let map = null;
    if (this.data.has(object)) {
      map = this.data.get(object);
      this.data.delete(object);
    }
    return map;
  }

  /**
   * Returns `true` if the given object has a dictionary defined.
   *
   * @param {Object} object - The object to test.
   * @return {boolean} Whether a dictionary is defined or not.
   */
  has(object) {
    return this.data.has(object);
  }

  /**
   * Frees internal resources.
   */
  dispose() {
    this.data = new WeakMap();
  }
}
export default DataMap;