public void initEditGrid() {

		FacesContext context = FacesContext.getCurrentInstance();		
		clearGrid();		
		HtmlGridEditing gridEditing = new HtmlGridEditing();
		Class[] args = new Class[] { CellValueChangeEvent.class };
		
		UnifiedMethodExpression methodExpr = UnificationHelper
				.createUnifiedMethodExpression(context,
						"#{cellChangeValueBean.cellValueChange}", args);
		gridEditing.setCellValueChangeListener(methodExpr);
		gridEditing.setEnableOnMouseClick("single");		
		editGrid.getTemplateItemsBehaviors().getFacets().
				put(GridView.FACET_GRID_EDITING, gridEditing);
		
		HtmlColumn firstNameColumn = new HtmlColumn ();
		firstNameColumn.setSortBy("firstName");		
		
		UnifiedOutput columnFirstNameHeader = new UnifiedOutput();
		columnFirstNameHeader.setValue("FirstName");
		firstNameColumn.setHeader(columnFirstNameHeader);	
		
		UnifiedOutput columnText = new UnifiedOutput();
		UnifiedValueExpression uniValueExpressionFirstName = UnificationHelper
		.createUnifiedValueExpression(context,"#{DATA_ROW.firstName}");
		columnText.setUnifiedValueExpression("value", uniValueExpressionFirstName);
		firstNameColumn.getChildren().add(columnText);		
		firstNameColumn.setStyle("background-color: #AACC44;");		
		
		editGrid.getTemplateItems().add(firstNameColumn);	
		
		editGrid.dataBind();
	}
	
	private void clearGrid() {
		// clear the grid
		editGrid.setFooter(null);
		editGrid.setHeader(null);
		editGrid.getChildren().clear();
		editGrid.getTemplateItems().clear();
		editGrid.setColumnPositions(null);
	}	

	public void cellValueChange(CellValueChangeEvent event) {
		FacesContext ctx = FacesContext.getCurrentInstance();	
		String newValue  = (String) event.getNewValue();
		String oldValue  = (String) event.getOldValue();	
		System.out.println( " Old value - " + oldValue + ";  newValue -  " + newValue);
	}