/**
* 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;