postlinkaction.java

Chinaxp 论坛源代码

/*
 * XP Forum
 *
 * Copyright (c) 2002-2003 RedSoft Group.  All rights reserved.
 *
 */
package org.redsoft.forum.web;

import java.io.IOException;

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

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
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.redsoft.forum.ForumConstants;
import org.redsoft.forum.dao.DAOFactory;
import org.redsoft.forum.dao.ForumDAO;
import org.redsoft.forum.dao.Thread;
import org.redsoft.forum.dao.ThreadDAO;
import org.redsoft.forum.exception.DAOException;
import org.redsoft.forum.exception.ThreadNotFoundException;


/**
 * A actino that wraps the link to post.jsp
 *
 * @author Charles Huang
 *
 * @version 1.0
 */
public class PostLinkAction extends Action {

    public ActionForward execute(ActionMapping mapping,
				 ActionForm form,
				 HttpServletRequest request,
				 HttpServletResponse response)
	throws IOException, ServletException {

		ActionErrors errors = new ActionErrors();

		final String forumID = request.getParameter(ForumConstants.FORUM_ID_PARAM);
		if(forumID == null || forumID.equals("")) {
			errors.add(ActionErrors.GLOBAL_ERROR,
		                           new ActionError("error.forumID.invalid"));
		}else{
			int forum = Integer.parseInt( forumID );
			ForumDAO forumDAO = DAOFactory.getInstance().getForumDAO();
			Forum[] forums = forumDAO.getForumCategory();

			if( forum > forums.length ){
				errors.add(ActionErrors.GLOBAL_ERROR,
		                           new ActionError("error.forumID.invalid"));
			}
		}

		// If this is a reply
		final String parentId = request.getParameter( "Id" );
		if( parentId != null && parentId.length() > 0 ){
			try{
				final ThreadDAO dao = DAOFactory.getInstance().getThreadDAO();
				final Thread thread = dao.findByUID( Long.parseLong( parentId ) );
				request.setAttribute( ForumConstants.MY_THREAD_PARAM,
									  thread );
			} catch( final ThreadNotFoundException threadNotFoundException ){
				return (mapping.findForward("error"));
			} catch (DAOException daoe) {
                daoe.printStackTrace();
                return (mapping.findForward("error"));
            }
		}


		// Report any errors we have discovered back to the original form
		if (!errors.isEmpty()) {
            saveErrors(request, errors);
            return ( mapping.findForward( "error" ) );
		}

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