How to pass Result dynamic param value while using Annotation to define action

[Matt Jiang]

Hi guys,

As you can see example in http://cwiki.apache.org/WW/convention-plugin.html
You can pass static parameters to Results.
The example shows below is static String, but if I would like to use dynamic
value, such as getting value from Action. How do I write it?
Do I just use ${expression} as well?

public class HelloWorld extends ActionSupport {
  @Action(value="/different/url",
    result...@result(name="success", type="httpheader",
params={"status", "500", "errorMessage", "Internal Error"})}

  )
  public String execute() {
    return SUCCESS;
  }
}

thanks a lot,
Matt