ShowLanguagesAction.java

/*
 * Copyright 2007 Zhang, Zheng <oldbig@gmail.com>
 * 
 * This file is part of ZOJ.
 * 
 * ZOJ 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 revision 3 of the License, or (at your option) any later revision.
 * 
 * ZOJ 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 ZOJ. if not, see
 * <http://www.gnu.org/licenses/>.
 */

package cn.edu.zju.acm.onlinejudge.action;

import java.util.List;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import cn.edu.zju.acm.onlinejudge.bean.enumeration.Language;
import cn.edu.zju.acm.onlinejudge.util.PersistenceManager;

/**
 * <p>
 * ShowLanguagesAction
 * </p>
 * 
 * 
 * @author Zhang, Zheng
 * @version 2.0
 */
public class ShowLanguagesAction extends BaseAction {

    /**
     * <p>
     * Default constructor.
     * </p>
     */
    public ShowLanguagesAction() {
    // empty
    }

    /**
     * ShowLanguagesAction
     * 
     * <pre>
     * </pre>
     * 
     * @param mapping
     *            action mapping
     * @param form
     *            action form
     * @param request
     *            http servlet request
     * @param response
     *            http servlet response
     * 
     * @return action forward instance
     * 
     * @throws Exception
     *             any errors happened
     */
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form, ContextAdapter context) throws Exception {

        // check admin
        ActionForward forward = this.checkAdmin(mapping, context);
        if (forward != null) {
            return forward;
        }

        List<Language> languages = PersistenceManager.getInstance().getLanguagePersistence().getAllLanguages();
        context.setAttribute("Languages", languages);
        return this.handleSuccess(mapping, context, "success");
    }

}