1 package edu.drexel.cms.interceptors;
2
3 import static edu.drexel.cms.commons.MessageKeys.INVALID_DATA;
4 import static edu.drexel.cms.commons.MessageKeys.PLEASE_LOGIN;
5
6 import javax.servlet.http.HttpServletRequest;
7
8 import org.apache.commons.logging.Log;
9 import org.apache.commons.logging.LogFactory;
10 import org.apache.struts2.ServletActionContext;
11
12 import com.opensymphony.xwork2.ActionInvocation;
13 import com.opensymphony.xwork2.ActionSupport;
14 import com.opensymphony.xwork2.ValidationAware;
15 import com.opensymphony.xwork2.interceptor.Interceptor;
16
17 import edu.drexel.cms.actions.SessionConstants;
18 import edu.drexel.cms.commons.CmsDataValidationException;
19 import edu.drexel.cms.data.CmsDAO;
20 import edu.drexel.cmsDb.datamodel.Paper;
21 import edu.drexel.cmsDb.datamodel.User;
22
23 public class NewReviewInterceptor extends ActionSupport implements Interceptor{
24 private static final long serialVersionUID = 20070504L;
25 private static final Log LOG = LogFactory.getLog(NewReviewInterceptor.class);
26 private static final String PAGE_ERROR = "error.new.review.page";
27 public void destroy() {}
28 public void init() {}
29
30 public String intercept(ActionInvocation ai) throws Exception {
31 HttpServletRequest request = ServletActionContext.getRequest();
32 try{
33 User user = (User)request.getSession().getAttribute(SessionConstants.USER_ATTRIBUTE);
34 if(user == null){
35 addErrors(ai, getText(PLEASE_LOGIN));
36 return ActionSupport.LOGIN;
37 }
38 String paperId = request.getParameter("paperId");
39 Paper paper = CmsDAO.getPaper(user, Long.valueOf(paperId));
40 request.setAttribute(SessionConstants.PAPER_ATTRIBUTE, paper);
41
42 }catch (CmsDataValidationException e) {
43 LOG.error(getText(INVALID_DATA), e);
44 addErrors(ai, e.getMessage());
45 }
46 catch (Exception e) {
47 LOG.error(getText(PAGE_ERROR), e);
48 addErrors(ai, getText(PAGE_ERROR));
49 }
50 return ai.invoke();
51 }
52 private void addErrors(ActionInvocation ai, String message){
53 if (ai.getAction() instanceof ValidationAware) {
54 ValidationAware action = (ValidationAware) ai.getAction();
55 action.addActionError(message);
56 }
57 }
58 }