mydspaceservlet.java

dspace 用j2ee架构的一个数字图书馆.开源程序

    /**
     * Process input from preview task page
     * 
     * @param context
     *            current context
     * @param request
     *            current servlet request object
     * @param response
     *            current servlet response object
     */
    private void processPreviewTask(Context context,
            HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, SQLException,
            AuthorizeException
    {
        String buttonPressed = UIUtil.getSubmitButton(request, "submit_cancel");

        // Get workflow item
        WorkflowItem workflowItem;

        try
        {
            int wfID = Integer.parseInt(request.getParameter("workflow_id"));
            workflowItem = WorkflowItem.find(context, wfID);
        }
        catch (NumberFormatException nfe)
        {
            workflowItem = null;
        }

        if (workflowItem == null)
        {
            log.warn(LogManager.getHeader(context, "integrity_error", UIUtil
                    .getRequestLogInfo(request)));
            JSPManager.showIntegrityError(request, response);

            return;
        }

        if (buttonPressed.equals("submit_start"))
        {
            // User clicked "start" button to claim the task
            WorkflowManager.claim(context, workflowItem, context
                    .getCurrentUser());

            // Display "perform task" page
            request.setAttribute("workflow.item", workflowItem);
            JSPManager.showJSP(request, response, "/mydspace/perform-task.jsp");
            context.complete();
        }
        else
        {
            // Return them to main page
            showMainPage(context, request, response);
        }
    }

    /**
     * Process input from perform task page
     * 
     * @param context
     *            current context
     * @param request
     *            current servlet request object
     * @param response
     *            current servlet response object
     */
    private void processPerformTask(Context context,
            HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, SQLException,
            AuthorizeException
    {
        String buttonPressed = UIUtil.getSubmitButton(request, "submit_cancel");

        // Get workflow item
        WorkflowItem workflowItem;

        try
        {
            int wfID = Integer.parseInt(request.getParameter("workflow_id"));
            workflowItem = WorkflowItem.find(context, wfID);
        }
        catch (NumberFormatException nfe)
        {
            workflowItem = null;
        }

        if (workflowItem == null)
        {
            log.warn(LogManager.getHeader(context, "integrity_error", UIUtil
                    .getRequestLogInfo(request)));
            JSPManager.showIntegrityError(request, response);

            return;
        }

        if (buttonPressed.equals("submit_approve"))
        {
            Item item = workflowItem.getItem();

            // Advance the item along the workflow
            WorkflowManager.advance(context, workflowItem, context
                    .getCurrentUser());

            // FIXME: This should be a return value from advance()
            // See if that gave the item a Handle. If it did,
            // the item made it into the archive, so we
            // should display a suitable page.
            String handle = HandleManager.findHandle(context, item);

            if (handle != null)
            {
                String displayHandle = HandleManager.getCanonicalForm(handle);

                request.setAttribute("handle", displayHandle);
                JSPManager.showJSP(request, response,
                        "/mydspace/in-archive.jsp");
            }
            else
            {
                JSPManager.showJSP(request, response,
                        "/mydspace/task-complete.jsp");
            }

            context.complete();
        }
        else if (buttonPressed.equals("submit_reject"))
        {
            // Submission rejected. Ask the user for a reason
            log.info(LogManager.getHeader(context, "get_reject_reason",
                    "workflow_id=" + workflowItem.getID() + ",item_id="
                            + workflowItem.getItem().getID()));

            request.setAttribute("workflow.item", workflowItem);
            JSPManager
                    .showJSP(request, response, "/mydspace/reject-reason.jsp");
        }
        else if (buttonPressed.equals("submit_edit"))
        {
            // FIXME: Check auth
            log.info(LogManager.getHeader(context, "edit_workflow_item",
                    "workflow_id=" + workflowItem.getID() + ",item_id="
                            + workflowItem.getItem().getID()));

            // Forward control to the submission interface
            // with the relevant item
            response.sendRedirect(response.encodeRedirectURL(request
                    .getContextPath()
                    + "/submit?workflow=" + workflowItem.getID()));
        }
        else if (buttonPressed.equals("submit_pool"))
        {
            // Return task to pool
            WorkflowManager.unclaim(context, workflowItem, context
                    .getCurrentUser());
            showMainPage(context, request, response);
            context.complete();
        }
        else
        {
            // Cancelled. The user hasn't taken the task.
            // Just return to the main My DSpace page.
            showMainPage(context, request, response);
        }
    }

    /**
     * Process input from "reason for rejection" page
     * 
     * @param context
     *            current context
     * @param request
     *            current servlet request object
     * @param response
     *            current servlet response object
     */
    private void processRejectReason(Context context,
            HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, SQLException,
            AuthorizeException
    {
        String buttonPressed = UIUtil.getSubmitButton(request, "submit_cancel");

        // Get workflow item
        WorkflowItem workflowItem;

        try
        {
            int wfID = Integer.parseInt(request.getParameter("workflow_id"));
            workflowItem = WorkflowItem.find(context, wfID);
        }
        catch (NumberFormatException nfe)
        {
            workflowItem = null;
        }

        if (workflowItem == null)
        {
            log.warn(LogManager.getHeader(context, "integrity_error", UIUtil
                    .getRequestLogInfo(request)));
            JSPManager.showIntegrityError(request, response);

            return;
        }

        if (buttonPressed.equals("submit_send"))
        {
            String reason = request.getParameter("reason");

            WorkspaceItem wsi = WorkflowManager.reject(context, workflowItem,
                    context.getCurrentUser(), reason);

            // Set the "stage_reached" column on the returned workspace item
            // to the "verify" stage
            wsi.setStageReached(SubmitServlet.REVIEW_SUBMISSION);
            wsi.update();

            JSPManager
                    .showJSP(request, response, "/mydspace/task-complete.jsp");
            context.complete();
        }
        else
        {
            request.setAttribute("workflow.item", workflowItem);
            JSPManager.showJSP(request, response, "/mydspace/perform-task.jsp");
        }
    }

    // ****************************************************************
    // ****************************************************************
    // METHODS FOR SHOWING FORMS
    // ****************************************************************
    // ****************************************************************

    /**
     * Show the main My DSpace page
     * 
     * @param context
     *            current context
     * @param request
     *            current servlet request object
     * @param response
     *            current servlet response object
     */
    private void showMainPage(Context context, HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException,
            SQLException, AuthorizeException
    {
        log.info(LogManager.getHeader(context, "view_mydspace", ""));

        // FIXME: WorkflowManager should return arrays
        List ownedList = WorkflowManager.getOwnedTasks(context, context
                .getCurrentUser());
        WorkflowItem[] owned = new WorkflowItem[ownedList.size()];
        owned = (WorkflowItem[]) ownedList.toArray(owned);

        // Pooled workflow items
        List pooledList = WorkflowManager.getPooledTasks(context, context
                .getCurrentUser());
        WorkflowItem[] pooled = new WorkflowItem[pooledList.size()];
        pooled = (WorkflowItem[]) pooledList.toArray(pooled);

        // User's WorkflowItems
        WorkflowItem[] workflowItems = WorkflowItem.findByEPerson(context,
                context.getCurrentUser());

        // User's PersonalWorkspace
        WorkspaceItem[] workspaceItems = WorkspaceItem.findByEPerson(context,
                context.getCurrentUser());

        // User's authorization groups
        Group[] memberships = context.getCurrentUser().getGroupMemberships();

        SupervisedItem[] supervisedItems = SupervisedItem.findbyEPerson(
                context, context.getCurrentUser());

        // Set attributes
        request.setAttribute("mydspace.user", context.getCurrentUser());
        request.setAttribute("workspace.items", workspaceItems);
        request.setAttribute("workflow.items", workflowItems);
        request.setAttribute("workflow.owned", owned);
        request.setAttribute("workflow.pooled", pooled);
        request.setAttribute("group.memberships", memberships);
        request.setAttribute("supervised.items", supervisedItems);

        // Forward to main mydspace page
        JSPManager.showJSP(request, response, "/mydspace/main.jsp");
    }

    /**
     * Show the user's previous submissions.
     * 
     * @param context
     *            current context
     * @param request
     *            current servlet request object
     * @param response
     *            current servlet response object
     */
    private void showPreviousSubmissions(Context context,
            HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException, SQLException,
            AuthorizeException
    {
        ItemIterator subs = Item.findBySubmitter(context, context
                .getCurrentUser());

        // Turn the iterator into a list
        List subList = new LinkedList();

        while (subs.hasNext())
        {
            subList.add(subs.next());
        }

        Item[] items = new Item[subList.size()];

        for (int i = 0; i < subList.size(); i++)
        {
            items[i] = (Item) subList.get(i);
        }

        log.info(LogManager.getHeader(context, "view_own_submissions", "count="
                + items.length));

        request.setAttribute("user", context.getCurrentUser());
        request.setAttribute("items", items);

        JSPManager.showJSP(request, response, "/mydspace/own-submissions.jsp");
    }
}