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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { EventEmitter } = require('../events');
const unload = require('../unload');
const Registry = EventEmitter.compose({
_registry: null,
_constructor: null,
constructor: function Registry(constructor) {
this._registry = [];
this._constructor = constructor;
this.on('error', this._onError = this._onError.bind(this));
unload.ensure(this, "_destructor");
},
_destructor: function _destructor() {
let _registry = this._registry.slice(0);
for each (let instance in _registry)
this._emit('remove', instance);
this._registry.splice(0);
},
_onError: function _onError(e) {
if (!this._listeners('error').length)
console.error(e);
},
has: function has(instance) {
let _registry = this._registry;
return (
(0 <= _registry.indexOf(instance)) ||
(instance && instance._public && 0 <= _registry.indexOf(instance._public))
);
},
add: function add(instance) {
let { _constructor, _registry } = this;
if (!(instance instanceof _constructor))
instance = new _constructor(instance);
if (0 > _registry.indexOf(instance)) {
_registry.push(instance);
this._emit('add', instance);
}
return instance;
},
remove: function remove(instance) {
let _registry = this._registry;
let index = _registry.indexOf(instance)
if (0 <= index) {
this._emit('remove', instance);
_registry.splice(index, 1);
}
}
});
exports.Registry = Registry;
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