@openhps/core/src/three/nodes/core/NodeCache.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
let _id = 0;

/**
 * This utility class is used in {@link NodeBuilder} as an internal
 * cache data structure for node data.
 */
class NodeCache {
  /**
   * Constructs a new node cache.
   *
   * @param {?NodeCache} parent - A reference to a parent cache.
   */
  constructor(parent = null) {
    /**
     * The id of the cache.
     *
     * @type {number}
     * @readonly
     */
    this.id = _id++;

    /**
     * A weak map for managing node data.
     *
     * @type {WeakMap<Node, Object>}
     */
    this.nodesData = new WeakMap();

    /**
     * Reference to a parent node cache.
     *
     * @type {?NodeCache}
     * @default null
     */
    this.parent = parent;
  }

  /**
   * Returns the data for the given node.
   *
   * @param {Node} node - The node.
   * @return {?Object} The data for the node.
   */
  getData(node) {
    let data = this.nodesData.get(node);
    if (data === undefined && this.parent !== null) {
      data = this.parent.getData(node);
    }
    return data;
  }

  /**
   * Sets the data for a given node.
   *
   * @param {Node} node - The node.
   * @param {Object} data - The data that should be cached.
   */
  setData(node, data) {
    this.nodesData.set(node, data);
  }
}
var _default = exports.default = NodeCache;