/*
 * This file was automatically generated by MD4J. 
 * 
 * Licensed under the GNU General Public License, Version 2.0 (the "License") or above;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * *http://www.gnu.org/licenses/gpl.txt
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package gr.abiss.md4j.sampledomain.web;

import java.io.Serializable;

import java.util.Map;
import java.util.HashMap;
import java.util.Set;
import java.util.HashSet;

import java.text.SimpleDateFormat;

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

import org.apache.log4j.Logger;
import org.apache.commons.lang.math.NumberUtils;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.upload.MultipartRequestHandler;

import org.apache.struts.action.Action;
import gr.abiss.md4j.dao.Page;
import gr.abiss.md4j.util.StringUtil;

import gr.abiss.md4j.sampledomain.web.CityCrudForm;
import gr.abiss.md4j.sampledomain.business.CityManagerLocal;
import gr.abiss.md4j.sampledomain.business.CityManagerUtil;

/**
 * @struts.action path="/City/LoadUpdate" 
 *                         name="CityCrudForm"
 *                         input="/global/error.jsp"
 *                         scope="request"
 *                         validate="false"
 *
 * @struts.action-forward path="/City/Update.jsp"
 *                         name="CityLoadUpdateActionView"
 *
 */
public class CityLoadUpdateAction extends Action{

    private static Logger log = Logger.getLogger(CityLoadUpdateAction.class);

    /**
     * A static, unmodifiable Set holding the projection properties.
     * If you want these created at runtime in each <code>execute</code> method call, 
     * simply set <code>md4j:use-instance-projections</code> to <code>true</code>.
     */
    private static Set projectionProps = new HashSet();
    static{
        projectionProps.add("id");
        projectionProps.add("name");
        projectionProps.add("region");
        projectionProps.add("population");
        projectionProps.add("country.id");
        projectionProps.add("country.id");
        projectionProps = java.util.Collections.unmodifiableSet(projectionProps);
    }

    /**
     * @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)
     */
    public ActionForward execute(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) {
        String fwd = "error";
        try{
            CityCrudForm form = (CityCrudForm) actionForm;
            Serializable identifier = form.getId();
            if(identifier != null){
                // if we got here we will need a Session bean  
                CityManagerLocal manager = CityManagerUtil.getLocalHome().create();
                if(this.isTokenValid(request)){
                    // if the token is valid the form already has user-entered data so 
                    // we only want data to populate the drop down elements etc in the view 
                    Map map = manager.getParentOptions();
                    // populate form bean option data for drop downs
                    form.setParentSelectOptions(map);
                }
                else{
                    // otherwise, we need to load data for both the entity the user wishes to update 
                    // and for for the view's select options etc 
                    Map map = manager.getWithOptions(identifier, CityLoadUpdateAction.projectionProps);
                    // populate form bean from map
                    form.copyProperties(map);
                    // populate form bean option data for drop downs
                    form.setParentSelectOptions(map);
                }
                request.setAttribute("CityCrudForm", form);
            }
            // save a token to signal results need to be rendered next time 
            this.saveToken(request);
            fwd = "CityLoadUpdateActionView";
        } catch (Exception e) {
            // reset the token to avoid causing trouble 
            this.resetToken(request);
            log.error("Failed to perform search operation, wrapping to RuntimeException", e);
            throw new RuntimeException(e);
        }
        return mapping.findForward(fwd);
    }

}