readoData : function (){
        var serviceRoot = 'https://sapes1.sapdevcenter.com/sap/opu/odata/iwbep/GWDEMO/';
        var bpc;
            var headers = { 'Content-Type': 'application/json', Accept: 'application/json' };
            var request = {
                requestUri: serviceRoot + 'BusinessPartnerCollection',
                method: 'GET',
                headers: headers,
                data: null
            };
            odatajs.oData.request(
                request,
                function (data, response) {
                    bpc = data.value;
                },
                function (err) {
                    alert('Fail: ' + err.Message);
                }
            );
            alert(bpc);
    },