onInit: function() {

            var sUrl = "/sap/opu/odata/SAP/ZAPP14_SRV_01/";
            var oDataModel = new sap.ui.model.odata.v2.ODataModel(sUrl, {
                json: true,
                loadMetadataAsync: true
            });

            var oModel = new sap.ui.model.json.JSONModel();
            oDataModel.read("/countSet", {
                success: function(oData, response) {
                    oModel.setData(oData);
                }
            });
            oModel.setSizeLimit(300);
            this.getView().setModel(oModel, "count");
        }