/*
* Copyright 2003-2006, 2009, 2017, United States Government, as represented by the Administrator of the
* National Aeronautics and Space Administration. All rights reserved.
*
* The NASAWorldWind/WebWorldWind platform is licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
define([], function () {
"use strict";
// Contains all files that were already retrieved as a promises.
/**
* Provides Cache for Promises representing KmlFiles in current KmlDocument.
* @exports KmlFileCache
*/
var KmlFileCache = function () {
this._rootFile = null;
this._map = {};
};
/**
* Retrieve relevant KmlFile from the cache representing this Document.
* @param url {String} Url of the file to retrieve from this cache.
* @returns {Promise|null}
*/
KmlFileCache.prototype.retrieve = function (url) {
if (url.indexOf('kmz;') != 0 && url.indexOf('href;') != 0 && (url.indexOf('#') == 0 || url == null || url.indexOf('http') != 0)) {
return this._rootFile;
} else {
var urlNormalized = url;
if (url.indexOf('#') != -1) {
urlNormalized = url.substr(0, url.indexOf('#') - 1);
}
// Start of the URL use to store it in the map.
if (this._map[urlNormalized]) {
return this._map[urlNormalized];
}
}
return null;
};
/**
* Adds new KmlFile to the KmlDocument represented by this Cache.
* @param url {String} Url of the file for internal mapping
* @param filePromise {Promise} Promise of the file to be stored.
* @param isRoot {Boolean} Whether it is the root object for the cache.
*/
KmlFileCache.prototype.add = function (url, filePromise, isRoot) {
if (isRoot) {
this._rootFile = filePromise;
} else {
this._map[url] = filePromise;
}
};
return KmlFileCache; // Return actually object. This is singleton used throughout the whole application.
});