@Override
public ActionForward execute(
final ActionMapping mapping,
final ActionForm form,
final HttpServletRequest request,
final HttpServletResponse response)
throws Exception {
final ActionMessages msgs = new ActionMessages();
final ActionMessages errors = new ActionMessages();
int page;
long id;
try {
id = Long.parseLong(request.getParameter("id"));
page =
Integer.parseInt(
request.getParameter("page") == null ? "1" : request.getParameter("page"));
} catch (final NumberFormatException e) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("invalid.parameter"));
saveErrors(request, errors);
return mapping.findForward("error");
}
final TaskModelViewDelegateObject delegateObject =
(TaskModelViewDelegateObject)
TaskModelViewDelegate.getDelegateObject(request.getSession().getId(), id);
if (delegateObject == null) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("no.session"));
saveErrors(request, errors);
return mapping.findForward("error");
}
request.setAttribute("ReturnURL", delegateObject.getReturnURL());
TaskDef_Complex taskDef;
try {
taskDef = (TaskDef_Complex) delegateObject.getTaskDef();
} catch (final ClassCastException e2) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("only.complexTasks.supported"));
saveErrors(request, errors);
return mapping.findForward("error");
} catch (final TaskApiException e3) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("misc.error", e3.getMessage()));
saveErrors(request, errors);
log.error(e3);
return mapping.findForward("error");
}
final ComplexTaskInfoVO ctivo = new ComplexTaskInfoVO();
ctivo.setLogin(delegateObject.getLogin());
ctivo.setUserName(delegateObject.getUserName());
ctivo.setReturnURL(delegateObject.getReturnURL());
ComplexTasklet ct;
try {
ct = (ComplexTasklet) delegateObject.getTasklet();
} catch (final ClassCastException e1) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("only.complexTasks.supported"));
saveErrors(request, errors);
return mapping.findForward("error");
} catch (final TaskApiException e3) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("misc.error", e3.getMessage()));
saveErrors(request, errors);
log.error(e3);
return mapping.findForward("error");
}
if (!taskDef.isActive()) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("task.inactive"));
saveErrors(request, errors);
return mapping.findForward("error");
}
final String todo = request.getParameter("todo");
try {
SavePageAction.logPostData(request, ct);
if ("new".equals(todo)) { // new try
int tryNo = Integer.parseInt(request.getParameter("try"));
// will load Addons here (if any)
ct.startNewTry(tryNo, delegateObject.getRandomSeed());
log.info("Student starts new try.");
} else if ("continue".equals(todo)) { // continue try
ct.continueLastTry();
log.info("Student continues the try.");
} else {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("invalid.parameter"));
saveErrors(request, errors);
return mapping.findForward("error");
}
} catch (final IllegalStateException e) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(e.getMessage()));
saveErrors(request, errors);
log.info(e);
return mapping.findForward("error");
} catch (final NumberFormatException e1) {
errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("invalid.parameter"));
saveErrors(request, errors);
return mapping.findForward("error");
}
// check if clicked on save-and-forward (or save-and-backward)
if (request.getParameterMap().containsKey("save-and-forward")) {
// handle what to do when there is no next page
Try ttry = ct.getActiveTry();
if (page < ttry.getNumberOfPages()) page = page + 1;
} else if (request.getParameterMap().containsKey("save-and-backward")) {
// handle what to do when there is no previous page
if (page > 1) page = page - 1;
}
populateVO(ctivo, taskDef, ct, page);
request.setAttribute("Task", ctivo);
// add the navigation menu
final NavigationRootNode nrn = new NavigationRootNode(ct, id, page);
request.setAttribute("rootNode", nrn);
final NavigationNodeFormatter nnf =
new NavigationNodeFormatter(
id,
request.getContextPath() + mapping.findForward("execute").getPath(),
request,
response);
request.setAttribute("nodeFormatter", nnf);
request.setAttribute("expanded", true);
final HtmlViewContext context = new HtmlViewContext(request);
// add the subtasklets
final List<SubTasklet> subtasklets = ct.getActiveTry().getPage(page).getSubTasklets();
final List<SubTaskletInfoVO> stivos = new ArrayList<SubTaskletInfoVO>();
int i = 0;
for (final SubTasklet subTasklet : subtasklets) {
final SubTaskletInfoVO stivo = new SubTaskletInfoVO();
stivo.setHint(subTasklet.getHint());
stivo.setProblem(ParserUtil.getProblem(subTasklet.getProblem()));
stivo.setReachablePoints(subTasklet.getReachablePoints());
stivo.setVirtualSubTaskletNumber(subTasklet.getVirtualSubtaskNumber());
stivo.setRenderedHTML(
TaskModelServices.getInstance().getSubTaskView(subTasklet).getRenderedHTML(context, i++));
stivo.setCorrected(subTasklet.isCorrected());
if (subTasklet.isCorrected()) {
stivo.setCorrectedHTML(
TaskModelServices.getInstance()
.getSubTaskView(subTasklet)
.getCorrectedHTML(context, i));
}
stivo.setInteractiveFeedback(subTasklet.isInteractiveFeedback());
stivos.add(stivo);
}
request.setAttribute("SubTasklets", stivos);
return mapping.findForward("success");
}