Two Situations to access Spark Datagrid New value

// Scenario one
// -------------
// Dataprovider is set of objects
// Datafield of Gridcolumn is mapped with object properties
// Now we can access the new value from dataprovider.
import spark.components.DataGrid;

var sparkDataGrid:DataGrid = new DataGrid();
sparkDataGrid.addEventListener(GridItemEditorEvent.GRID_ITEM_EDITOR_SESSION_SAVE, handleGridItemEditEnd);

private function handleGridItemEditEnd(event:GridItemEditorEvent):void
{
    var newValue:String = (event.currentTarget as CustomSparkDataGrid).dataProvider[event.rowIndex][event.columnIndex];
}


// Scenario Two
// -------------
// Dataprovider is set of objects
// Label function to set custom cell-display value and datafield is not mapped
// Label function return value, take precedence as dataField is Null
// so we can't access the new value from dataprovider
import spark.components.DataGrid;
import spark.components.gridClasses.GridItemEditor;
import spark.components.gridClasses.IGridItemEditor;

var sparkDataGrid:DataGrid = new DataGrid();
sparkDataGrid.addEventListener(GridItemEditorEvent.GRID_ITEM_EDITOR_SESSION_SAVE, handleGridItemEditEnd);

private var destroyedItemEditor:IGridItemEditor;

// Griditem Editor - gets destroyed  before dispatching the save event -
// So its important to get its reference .
private function handleGridItemEditStart(event:GridItemEditorEvent):void
{
    destroyedItemEditor = (event.currentTarget as DataGrid).itemEditorInstance;
}

// Griditem Editor - gets destroyed  before dispatching the save event -
// hence itemEditorInstance will be null at this stage
// We can't access the value from dataprovider as we use label function to set the cell display ,
// instead of dataField value
private function handleGridItemEditEnd(event:GridItemEditorEvent):void
{
    if(destroyedItemEditor){
        // As IGrid Itemeditor doesn't provide getter method to access value
        // we have to cast as base class to get the value property
        // It important for us, to make sure when we create our own custom editor , it extends Grid item editor base class
        // and override getter and setter of value method
        var newValue:String = (destroyedItemEditor as GridItemEditor).value as String;
    }
}