Question

I’m calling render() with a few arguments, the first of which is a String argument that I got as a parameter:

public static void action(String url) {
…

render(url,…);
}

I’m getting this error:

The template http://the.contents.of/urlParameter does not exist.

Now, I’m debugging through render(), where I see this snippet:

protected static void render(Object... args) {
    String templateName = null;
    if (args.length > 0 && args[0] instanceof String && LocalVariablesNamesTracer.getAllLocalVariableNames(args[0]).isEmpty()) {

        // I'm getting into this branch

        templateName = args[0].toString();
    } else {
        templateName = template();
    }
    renderTemplate(templateName, args);
}

What is the if trying to accomplish? Why am I getting into it – is it because I’m not using a local variable for url? Is this documented? What’s the reasoning here?

I’m using version 1.2.x-c40cf37 (that’s somewhere after 1.2.4).

Answer 1

If you provide a string as the first argument, then it assumes that it is the name of the template to render.

Example:

render("@password", url);

That will render the password-template and pass the url variable to it.

In your case you could do something like this instead:

render("@action", url);

EDIT:

As an alternative you could also do something like this:

renderArgs.put("url", url);
render();

Hope it helps.