Question

I have a jsf facelet which displays a summary of a search process.
Now I want to redirect to a detail page, if only one element was found by the search engine. I do not want to implement this redirect in my beans because I want to have the “knowledge” about this redirection out of my java code.

So I want to write something like that:

<ui:redirect if="#{searchResult.count eq 1}" target="details.jsf">
   <f:param name="id" value="#{searchResult.firstResult.technicalId}" />
</ui:redirect>

Any solutions or ideas for that?

I know, there are page-actions in JSF 2.2 but I am using JEE6 and there is JSF 2.0 available.
Btw. I currently I am usingMyFaces, Primefaces and Richfaces.

Greetings.

Answer 1

You should do this job in the controller, not in the view.

To get search results, you first need to invoke an action method by a search form, right? Just do the redirect job right there. You can tell JSF to send a redirect by specifying the faces-redirect=true in the query string of the action outcome.

public String search() {
    results = service.find(query);

    if (results.size() == 1) {
        return "details?faces-redirect=true&id=" + results.get(0).getTechnicalId();
    }
    else {
        return "results";
    }
}

Or if it’s a GET request which is handled by <f:event type="preRenderView">, then do so:

public void onPreRenderViewListener() {
    results = service.find(query);

    if (results.size() == 1) {
        FacesContext.getCurrentInstance().getExternalContext().redirect("details.jsf?id=" + results.get(0).getTechnicalId());
    }
}