46 lines
1.6 KiB
JavaScript
46 lines
1.6 KiB
JavaScript
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/*
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Copyright 2009 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Namespace.
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google.wspl.DatabaseFactory = google.wspl.DatabaseFactory || {};
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/**
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* Factory function to build databases in a cross-API manner.
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* @param {string} dbName of the database
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* @param {string} dbworkerUrl the URL for Gears worker.
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* @return {google.wspl.Database} The database object.
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*/
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google.wspl.DatabaseFactory.createDatabase = function(dbName, dbworkerUrl) {
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var dbms;
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if (window.openDatabase) {
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// We have HTML5 functionality.
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dbms = new google.wspl.html5.Database(dbName);
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} else {
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// Try to use Google Gears.
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var gearsDb = goog.gears.getFactory().create('beta.database');
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var wp = goog.gears.getFactory().create('beta.workerpool');
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// Note that Gears will not allow file based URLs when creating a worker.
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dbms = new wireless.db.gears.Database();
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dbms.openDatabase('', dbName, gearsDb);
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wp.onmessage = google.bind(dbms.onMessage_, dbms);
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// Comment this line out to use the synchronous database.
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dbms.startWorker(wp, dbworkerUrl, 0);
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}
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return dbms;
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};
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