java - Getting Result type in Interceptor

Question

I have Struts 2 actions with different (HTML and JSON ) result types. They use common interceptor.

If needed to intercept the request, how to return a result based on given action result type?

For example, my Action.ERROR forwards to JSP page. If action is JSON type I want to forward JSON error instead.

Answer 1

In Struts2 the action has not a type. This means that you cannot configure the type of the action. Instead you can configure result types in the xml configuration. In the xml configuration file this is defined as the result-type tag. When you configure the result using result tag you specify type attribute that will be used to determine the corresponding result type. Say name="success" or name="error" are results of the dispatcher result type.

When the action is intercepted you could get the results

Map<String, ResultConfig> results =  actionInvocation.getProxy().getConfig().getResults();

In the ResultConfig there's className attribute that could be used to determine the type of the result.