History problem in GWT (Please help)

[Sanket L Shah]

Hi All,

I am developing one GWT application.
I have so many panels (Pages) in my application.

I have got the solution for the history but the problem is that thre are so many If...Else in the MyHistoryListener class which implements the ValueChangeHandler interface...

Here I am putting some code which so shows the matrix of If...Else ....

public class MyHistoryListener implements ValueChangeHandler<String> {

	@Override
	public void onValueChange(ValueChangeEvent<String> event) {
		System.out.println("Current State : " + event.getValue());
		
		if (event.getValue().equals("page1")){
    		RootPanel.get().clear();
    		RootPanel.get().add(Page1.getInstance());
		}
		
		if (event.getValue().equals("page2")){
    		RootPanel.get().clear();
    		RootPanel.get().add(Page2.getInstance());
		}
		
		if (event.getValue().equals("page3")){
    		RootPanel.get().clear();
    		RootPanel.get().add(Page3.getInstance());
		}	

		if (event.getValue().equals("page4")){
    		RootPanel.get().clear();
    		RootPanel.get().add(Page4.getInstance());
		}	
	}
}