de.thorstenberger.taskmodel.view.AJAXSaveStudentAnnotationAction.java Source code

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Here is the source code for de.thorstenberger.taskmodel.view.AJAXSaveStudentAnnotationAction.java

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/*
    
Copyright (C) 2006 Thorsten Berger
    
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
/**
 * 
 */
package de.thorstenberger.taskmodel.view;

import java.util.Iterator;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import de.thorstenberger.taskmodel.TaskApiException;
import de.thorstenberger.taskmodel.TaskModelViewDelegate;
import de.thorstenberger.taskmodel.TaskModelViewDelegateObject;
import de.thorstenberger.taskmodel.Tasklet;
import de.thorstenberger.taskmodel.complex.ComplexTasklet;

/**
 * @author Thorsten Berger
 *
 */
public class AJAXSaveStudentAnnotationAction extends Action {

    Log log = LogFactory.getLog(AJAXSaveStudentAnnotationAction.class);

    /* (non-Javadoc)
     * @see org.apache.struts.action.Action#execute(org.apache.struts.action.ActionMapping, org.apache.struts.action.ActionForm, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws Exception {

        ActionMessages msgs = new ActionMessages();
        ActionMessages errors = new ActionMessages();

        // FIXME: error handling

        long id;
        try {
            id = Long.parseLong(request.getParameter("id"));
        } catch (NumberFormatException e) {
            errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("invalid.parameter"));
            saveErrors(request, errors);
            return mapping.findForward("error");
        }

        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");
        }

        ComplexTasklet ct;

        try {
            ct = (ComplexTasklet) delegateObject.getTasklet();
        } catch (ClassCastException e1) {
            errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("only.complexTasks.supported"));
            saveErrors(request, errors);
            return mapping.findForward("error");
        } catch (TaskApiException e3) {
            errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("misc.error", e3.getMessage()));
            saveErrors(request, errors);
            log.error(e3);
            return mapping.findForward("error");
        }

        logPostData(request, ct);

        boolean saved;
        String annotation = request.getParameter("studentAnnotation");

        try {

            saved = ct.studentAnnotatesCorrection(annotation);

        } catch (IllegalStateException e) {
            errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(e.getMessage()));
            saveErrors(request, errors);
            log.info(e);
            return mapping.findForward("error");
        }

        if (saved) {
            msgs.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("studentAnnotation.successful"));
            saveMessages(request, msgs);
        } else {
            errors.add(ActionErrors.GLOBAL_MESSAGE, new ActionMessage("studentAnnotation.no_comment"));
            saveErrors(request, errors);
        }

        request.setAttribute("contentType", "text/plain");
        request.setAttribute(AjaxResponseServlet.RESPONSE, annotation);

        return mapping.findForward("success");

    }

    public static void logPostData(HttpServletRequest request, Tasklet tasklet) {
        Map vars = request.getParameterMap();
        StringBuffer parameters = new StringBuffer();
        Iterator keys = vars.keySet().iterator();
        while (keys.hasNext()) {
            String key = (String) keys.next();
            parameters.append(key + "=" + ((String[]) vars.get(key))[0] + "\n");
        }
        tasklet.logPostData("StudentAnnotation: posted parameters:\n" + parameters.toString(),
                request.getRemoteAddr());
    }

}