mysqlfactory.java

JSP新闻发布系统 JSP新闻发布系统

package net.ijsp.news.news.mysql;

/**
 * <p>Title: Factory</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: ijsp.net</p>
 * @author ccjsmile
 * @version 1.0
 */

import net.ijsp.news.news.Factory;
import net.ijsp.news.news.User;
import net.ijsp.news.news.UserFactory;
import net.ijsp.news.news.Board;
import net.ijsp.news.news.BoardFactory;
import net.ijsp.news.news.News;
import net.ijsp.news.news.NewsFactory;
import net.ijsp.news.search.*;
import net.ijsp.news.search.database.*;

public class MysqlFactory extends Factory {

        private static UserFactory userFactory = null;
        private static BoardFactory boardFactory = null;
        private static NewsFactory newsFactory = null;

        private final static String className = "net.ijsp.news.news.mysql.MysqlUserFactory";
        private final static String className1 = "net.ijsp.news.news.mysql.MysqlBoardFactory";
        private final static String className2 = "net.ijsp.news.news.mysql.MysqlNewsFactory";

        public MysqlFactory() {

        }

        /**
        * 获取 User 实例
        */
        public User getUser() {
                return (User)new MysqlUser();
        }

        /**
        * 获取 UserFactory 实例
        */
        public UserFactory getUserFactory()  {
                if(userFactory==null) {
                        try {
                                Class c = Class.forName(className);
                                userFactory = (UserFactory)c.newInstance();
                        } catch (Exception ex) {
                    ex.printStackTrace();
                    }
                }
                return userFactory;
        }

        /**
        * 获取 Board 实例
        */
        public Board getBoard() {
                return (Board)new MysqlBoard();
        }


        /**
        * 获取 BoardFactory 实例
        */
        public  BoardFactory getBoardFactory()  {
                if(boardFactory==null) {
                        try {
                                Class c = Class.forName(className1);
                                boardFactory = (BoardFactory)c.newInstance();
                        } catch (Exception ex) {
                    ex.printStackTrace();
                    }
                }
                return boardFactory;
        }

        /**
        * 获取 News 实例
        */
        public News getNews() {
                return  (News)new MysqlNews();
        }

        /**
        * 获取 NewsFactory 实例
        */
        public NewsFactory getNewsFactory() {
                if(newsFactory==null) {
                        try{
                                Class c = Class.forName(className2);
                                newsFactory = (NewsFactory)c.newInstance();
                        }catch(Exception ex){
                                System.err.println(ex);
                        }
                }
                return newsFactory;
        }

        /**
        * 设置检索
        */
        public SearchManager getSearchManager() {
                return (SearchManager)new DbSearchManager();
        }

        /**
        * 检索
        */
        public Query getQuery() {
                return (Query)new DbQuery();
        }

}