Angularjs和Phonegap数据库

Question

请有人建议我如何使用phonegap数据库创建角度工厂包装器。我尝试过：

angular.module('mobireward.factory', [])

.factory('dbFactory', function ($q) {
        var countries=[];
        var dbFactory = {};       
        var baseUrl = "http://182.18.157.106:8076/api/MobiRewardServices";       

        dbFactory.GetCountryList = function(){        

            //db.transaction(populateDB, errorCB, successCB);
            promisedQuery('DROP TABLE IF EXISTS COUNTRY', defaultResultHandler, errorCB);
            promisedQuery('CREATE TABLE IF NOT EXISTS COUNTRY (id unique, countryName, countryCode)', defaultResultHandler, errorCB);
            promisedQuery('INSERT INTO COUNTRY (id, countryName, countryCode) VALUES (1, "India", "IN")', defaultResultHandler, errorCB);
            promisedQuery('INSERT INTO COUNTRY (id, countryName, countryCode) VALUES (2, "Pakistan", "PK")', defaultResultHandler, errorCB);

            return promisedQuery('SELECT * FROM COUNTRY', defaultResultHandler, errorCB);           
        };

        function defaultResultHandler(deferred) {
          return function(tx, results) {
            var len = results.rows.length;
            var output_results = [];

            for (var i=0; i<len; i++){
                debugger  
                //alert(results.rows.item(i));
              output_results.push(results.rows.item(i));
            }

            deferred.resolve(output_results);  
          }  
        }

        function defaultErrorHandler(err) {
          alert("Error processing SQL: " + err.code);
        }

        function promisedQuery(query, successCB, errorCB) {
          var deferred = $q.defer();
          db.transaction(function(tx){
            tx.executeSql(query, [], successCB(deferred), errorCB);      
          }, errorCB);
          return deferred.promise;  
        }

        // something like private methods
        function errorCB(err) {
          alert("Error processing SQL: " + err.code);
        }

        var db = window.openDatabase("Mobireward", "1.0", "Mobireward", 200000);


        return dbFactory;
});