Get selected slice of dvt:pieChart using custom selection listener in ADF

importjavax.el.ELContext;

importjavax.el.ExpressionFactory;

importjavax.el.MethodExpression;
importjavax.el.ValueExpression;

importjavax.faces.context.FacesContext;


importoracle.jbo.Row;

importorg.apache.myfaces.trinidad.event.SelectionEvent;

publicclassPieChartSelectionBean{
publicPieChartSelectionBean(){
}

/**
     * Programmatic invocation of a method that an EL evaluates to.
     *
     * @param el EL of the method to invoke
     * @param paramTypes Array of Class defining the types of the parameters
     * @param params Array of Object defining the values of the parametrs
     * @return Object that the method returns
     */
publicstatic Object invokeEL(String el, Class[] paramTypes, Object[] params){
        FacesContext facesContext = FacesContext.getCurrentInstance();
        ELContext elContext = facesContext.getELContext();
        ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
        MethodExpression exp = expressionFactory.createMethodExpression(elContext, el, Object.class, paramTypes);

return exp.invoke(elContext, params);
}

/**
     * Programmatic evaluation of EL.
     *
     * @param el EL to evaluate
     * @return Result of the evaluation
     */
publicstatic Object evaluateEL(String el){
        FacesContext facesContext = FacesContext.getCurrentInstance();
        ELContext elContext = facesContext.getELContext();
        ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
        ValueExpression exp = expressionFactory.createValueExpression(elContext, el, Object.class);

return exp.getValue(elContext);
}

/**Custom Selection Listener for dvt:pieChart
     * @param selectionEvent
     */
publicvoidpieChartSelectionListener(SelectionEvent selectionEvent){
// Makes selected slice as current row
        invokeEL("#{bindings.Employees1.collectionModel.makeCurrent}",new Class[]{ SelectionEvent.class},new Object[]{
                 selectionEvent });
// Get the selected row (Use pie chart iterator name)
        Row selectedRow =(Row) evaluateEL("#{bindings.Employees1Iterator.currentRow}");// get the current selected row
// Get any attribute from selected row
        System.out.println("Selected Employee is-"+ selectedRow.getAttribute("FirstName"));

}


}