package ibei.interceptor;

import java.util.Map;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;


public class LoginInterceptor extends AbstractInterceptor {

	private static final long serialVersionUID = 1L;

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		Map<String,Object> session = invocation.getInvocationContext().getSession();

		String username = (String) session.get("username");

		if(username == null) {
			return Action.LOGIN;
		} else {
			return invocation.invoke();
		}
	}
}