From e44a7e37b6c7b5961adaffc62b9042b8d442938e Mon Sep 17 00:00:00 2001 From: mensonge Date: Thu, 13 Nov 2008 09:49:11 +0000 Subject: New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f --- includes/js/dojox/storage/GearsStorageProvider.js | 320 ++++++++++++++++++++++ 1 file changed, 320 insertions(+) create mode 100644 includes/js/dojox/storage/GearsStorageProvider.js (limited to 'includes/js/dojox/storage/GearsStorageProvider.js') diff --git a/includes/js/dojox/storage/GearsStorageProvider.js b/includes/js/dojox/storage/GearsStorageProvider.js new file mode 100644 index 0000000..1e80634 --- /dev/null +++ b/includes/js/dojox/storage/GearsStorageProvider.js @@ -0,0 +1,320 @@ +if(!dojo._hasResource["dojox.storage.GearsStorageProvider"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code. +dojo._hasResource["dojox.storage.GearsStorageProvider"] = true; +dojo.provide("dojox.storage.GearsStorageProvider"); +dojo.require("dojox.storage.Provider"); +dojo.require("dojox.storage.manager"); +dojo.require("dojox.sql"); + +if(dojo.isGears){ + + (function(){ + // make sure we don't define the gears provider if we're not gears + // enabled + + dojo.declare("dojox.storage.GearsStorageProvider", dojox.storage.Provider, { + // summary: + // Storage provider that uses the features of Google Gears + // to store data (it is saved into the local SQL database + // provided by Gears, using dojox.sql) + // description: + // You can disable this storage provider with the following djConfig + // variable: + // var djConfig = { disableGearsStorage: true }; + // + // Authors of this storage provider- + // Brad Neuberg, bkn3@columbia.edu + constructor: function(){ + }, + // instance methods and properties + TABLE_NAME: "__DOJO_STORAGE", + initialized: false, + + _available: null, + + initialize: function(){ + //console.debug("dojox.storage.GearsStorageProvider.initialize"); + if(dojo.config["disableGearsStorage"] == true){ + return; + } + + // partition our storage data so that multiple apps + // on the same host won't collide + this.TABLE_NAME = "__DOJO_STORAGE"; + + // create the table that holds our data + try{ + dojox.sql("CREATE TABLE IF NOT EXISTS " + this.TABLE_NAME + "( " + + " namespace TEXT, " + + " key TEXT, " + + " value TEXT " + + ")" + ); + dojox.sql("CREATE UNIQUE INDEX IF NOT EXISTS namespace_key_index" + + " ON " + this.TABLE_NAME + + " (namespace, key)"); + }catch(e){ + console.debug("dojox.storage.GearsStorageProvider.initialize:", e); + + this.initialized = false; // we were unable to initialize + dojox.storage.manager.loaded(); + return; + } + + // indicate that this storage provider is now loaded + this.initialized = true; + dojox.storage.manager.loaded(); + }, + + isAvailable: function(){ + // is Google Gears available and defined? + return this._available = dojo.isGears; + }, + + put: function(key, value, resultsHandler, namespace){ + if(this.isValidKey(key) == false){ + throw new Error("Invalid key given: " + key); + } + namespace = namespace||this.DEFAULT_NAMESPACE; + + // serialize the value; + // handle strings differently so they have better performance + if(dojo.isString(value)){ + value = "string:" + value; + }else{ + value = dojo.toJson(value); + } + + // try to store the value + try{ + dojox.sql("DELETE FROM " + this.TABLE_NAME + + " WHERE namespace = ? AND key = ?", + namespace, key); + dojox.sql("INSERT INTO " + this.TABLE_NAME + + " VALUES (?, ?, ?)", + namespace, key, value); + }catch(e){ + // indicate we failed + console.debug("dojox.storage.GearsStorageProvider.put:", e); + resultsHandler(this.FAILED, key, e.toString()); + return; + } + + if(resultsHandler){ + resultsHandler(dojox.storage.SUCCESS, key, null); + } + }, + + get: function(key, namespace){ + if(this.isValidKey(key) == false){ + throw new Error("Invalid key given: " + key); + } + namespace = namespace||this.DEFAULT_NAMESPACE; + + // try to find this key in the database + var results = dojox.sql("SELECT * FROM " + this.TABLE_NAME + + " WHERE namespace = ? AND " + + " key = ?", + namespace, key); + if(!results.length){ + return null; + }else{ + results = results[0].value; + } + + // destringify the content back into a + // real JavaScript object; + // handle strings differently so they have better performance + if(dojo.isString(results) && (/^string:/.test(results))){ + results = results.substring("string:".length); + }else{ + results = dojo.fromJson(results); + } + + return results; + }, + + getNamespaces: function(){ + var results = [ dojox.storage.DEFAULT_NAMESPACE ]; + + var rs = dojox.sql("SELECT namespace FROM " + this.TABLE_NAME + + " DESC GROUP BY namespace"); + for(var i = 0; i < rs.length; i++){ + if(rs[i].namespace != dojox.storage.DEFAULT_NAMESPACE){ + results.push(rs[i].namespace); + } + } + + return results; + }, + + getKeys: function(namespace){ + namespace = namespace||this.DEFAULT_NAMESPACE; + if(this.isValidKey(namespace) == false){ + throw new Error("Invalid namespace given: " + namespace); + } + + var rs = dojox.sql("SELECT key FROM " + this.TABLE_NAME + + " WHERE namespace = ?", + namespace); + + var results = []; + for(var i = 0; i < rs.length; i++){ + results.push(rs[i].key); + } + + return results; + }, + + clear: function(namespace){ + if(this.isValidKey(namespace) == false){ + throw new Error("Invalid namespace given: " + namespace); + } + namespace = namespace||this.DEFAULT_NAMESPACE; + + dojox.sql("DELETE FROM " + this.TABLE_NAME + + " WHERE namespace = ?", + namespace); + }, + + remove: function(key, namespace){ + namespace = namespace||this.DEFAULT_NAMESPACE; + + dojox.sql("DELETE FROM " + this.TABLE_NAME + + " WHERE namespace = ? AND" + + " key = ?", + namespace, + key); + }, + + putMultiple: function(keys, values, resultsHandler, namespace) { + if(this.isValidKeyArray(keys) === false + || ! values instanceof Array + || keys.length != values.length){ + throw new Error("Invalid arguments: keys = [" + + keys + "], values = [" + values + "]"); + } + + if(namespace == null || typeof namespace == "undefined"){ + namespace = dojox.storage.DEFAULT_NAMESPACE; + } + + if(this.isValidKey(namespace) == false){ + throw new Error("Invalid namespace given: " + namespace); + } + + this._statusHandler = resultsHandler; + + // try to store the value + try{ + dojox.sql.open(); + dojox.sql.db.execute("BEGIN TRANSACTION"); + var _stmt = "REPLACE INTO " + this.TABLE_NAME + " VALUES (?, ?, ?)"; + for(var i=0;i