Hi Kalpana,
oContext.getObject() will return the data object, from there you can access the properties directly.
eg
belnr = oDataArray.getObject().Belnr
referring back to javascript - How to group SAPUI5 OData before bind to control at client side? - Stack Overflow
you could use $.map or array.map to create a new array of objects
eg
var aNewArrary = jQuery.map( oDataArray, function( val, i ) {
var obj = val.getObject();
var newObj = {};
newObj.Belnr = obj.Belnr;
newObj.Gjahr = obj.Gjahr;
....
newObj.approve = function(){
//logic for approving
}
return newObj;
});
hth
jsp