lmaction.java

spring+hibernate+struts code

package com.relationinfo.webapp.action;

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

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 com.relationinfo.Constants;
import com.relationinfo.model.Lm;
import com.relationinfo.service.LmManager;
import com.relationinfo.webapp.form.LmForm;

/**
 * Action class to handle CRUD on a Lm object
 *
 * @struts.action name="lmForm" path="/lms" scope="request"
 *  validate="false" parameter="method" input="mainMenu"
 * @struts.action name="lmForm" path="/editLm" scope="request"
 *  validate="false" parameter="method" input="list"
 * @struts.action name="lmForm" path="/saveLm" scope="request"
 *  validate="true" parameter="method" input="edit"
 * 
 * @struts.action-forward name="edit" path="/WEB-INF/pages/lmForm.jsp"
 * @struts.action-forward name="list" path="/WEB-INF/pages/lmList.jsp"
 * @struts.action-forward name="search" path="/lms.html" redirect="true"
 */
public final class LmAction extends BaseAction {
    public ActionForward cancel(ActionMapping mapping, ActionForm form,
                                HttpServletRequest request,
                                HttpServletResponse response)
    throws Exception {
        return mapping.findForward("search");
    }

    public ActionForward delete(ActionMapping mapping, ActionForm form,
                                HttpServletRequest request,
                                HttpServletResponse response)
    throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("Entering 'delete' method");
        }

        ActionMessages messages = new ActionMessages();
        LmForm lmForm = (LmForm) form;

        // Exceptions are caught by ActionExceptionHandler
        LmManager mgr = (LmManager) getBean("lmManager");
        mgr.removeLm(lmForm.getLmbm());

        messages.add(ActionMessages.GLOBAL_MESSAGE,
                     new ActionMessage("lm.deleted"));

        // save messages in session, so they'll survive the redirect
        saveMessages(request.getSession(), messages);

        return mapping.findForward("search");
    }

    public ActionForward edit(ActionMapping mapping, ActionForm form,
                              HttpServletRequest request,
                              HttpServletResponse response)
    throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("Entering 'edit' method");
        }

        LmForm lmForm = (LmForm) form;

        // if an id is passed in, look up the user - otherwise
        // don't do anything - user is doing an add
        if (lmForm.getLmbm() != null) {
            LmManager mgr = (LmManager) getBean("lmManager");
            Lm lm = mgr.getLm(lmForm.getLmbm());
            lmForm = (LmForm) convert(lm);
            updateFormBean(mapping, request, lmForm);
        }

        return mapping.findForward("edit");
    }

    public ActionForward save(ActionMapping mapping, ActionForm form,
                              HttpServletRequest request,
                              HttpServletResponse response)
    throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("Entering 'save' method");
        }

        // Extract attributes and parameters we will need
        ActionMessages messages = new ActionMessages();
        LmForm lmForm = (LmForm) form;
        boolean isNew = ("".equals(lmForm.getLmbm()) || lmForm.getLmbm() == null);

        LmManager mgr = (LmManager) getBean("lmManager");
        Lm lm = (Lm) convert(lmForm);
        mgr.saveLm(lm);

        // add success messages
        if (isNew) {
            messages.add(ActionMessages.GLOBAL_MESSAGE,
                         new ActionMessage("lm.added"));

            // save messages in session to survive a redirect
            saveMessages(request.getSession(), messages);

            return mapping.findForward("search");
        } else {
            messages.add(ActionMessages.GLOBAL_MESSAGE,
                         new ActionMessage("lm.updated"));
            saveMessages(request, messages);

            return mapping.findForward("edit");
        }
    }

    public ActionForward search(ActionMapping mapping, ActionForm form,
                                HttpServletRequest request,
                                HttpServletResponse response)
    throws Exception {
        if (log.isDebugEnabled()) {
            log.debug("Entering 'search' method");
        }

        LmForm lmForm = (LmForm) form;
        Lm lm = (Lm) convert(lmForm);

        LmManager mgr = (LmManager) getBean("lmManager");
        request.setAttribute(Constants.LM_LIST, mgr.getLms(lm));

        return mapping.findForward("list");
    }
    public ActionForward unspecified(ActionMapping mapping, ActionForm form,
                                     HttpServletRequest request,
                                     HttpServletResponse response)
            throws Exception {
        return search(mapping, form, request, response);
    }
}