How to use the "ILink"

[Kushan Jayathilake <ku...@gmail.com>]

Hi

Im new to tapestry, and dont know much
Anyone can give me examples of using ILink interface

Plz give me some actual codings that you guys used ILink


Regards
Kushan

Re: How to use the "ILink"

[Geoff Callender <ge...@gmail.com>]

Basic usage of ILink to go to next page.  This is a listener method.

	public ILink doNextPage() {
		return getPageService().getLink(false, "pages/TheSecondPage");
	}

Example of ILink in a real life situation - logging in.  This is a  
listener on the Log In button.

	@Bean
	public abstract ValidationDelegate getValidationDelegate();

	public ILink doLogin() {
		ILink redirectTo = null;

		try {
			// If errors already detected by validators, return without redirect
			if (getValidationDelegate().getHasErrors()) {
				return null;
			}

			// Authenticate the user, password
			// ...insert code...

			// Redirect to WelcomePage
			redirectTo = getPageService().getLink(false, "pages/WelcomePage");
			return redirectTo;
		}
		catch (MyAuthenticationException e) {
			recordError(e.toString());
		}
		catch (Exception e) {
			// This should never happen, but we've caught it just in case
			// (and should probably log it instead of just printing stack trace)
			e.printStackTrace();
			// Display general error, retrieving message from  
application's .properties file
			recordError(getMessages().getMessage("login_problem"));
		}

		return redirectTo;
	}

	protected void recordError(String message) {
		ValidationDelegate delegate = getValidationDelegate();
		delegate.setFormComponent(null);
		delegate.record(message, null);
	}

HTH,

Geoff
http://files.doublenegative.com.au/jumpstart

On 05/06/2007, at 7:18 PM, Kushan Jayathilake wrote:

> Hi
>
> Im new to tapestry, and dont know much
> Anyone can give me examples of using ILink interface
>
> Plz give me some actual codings that you guys used ILink
>
>
> Regards
> Kushan