boardfactory.java

基于struct结构的jsp

package com.ntsky.bbs.service;

import java.util.*;
import org.apache.log4j.Logger ;
/**
 * <p>Title: Ntsky OpenSource BBS</p>
 * <p>Description: 模板的加工工厂</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: WWW.FM880.COM</p>
 * @author 姚君林
 * @version 1.0
 */

public abstract class BoardFactory {
    private final static Logger logger = Logger.getLogger(UserFactory.class);
    private static BoardFactory factory = null;
    private static Object initLock = new Object();
    private final static String CLASSNAME = "com.ntsky.bbs.service.db.DBBoardFactory";

    public abstract void upBoardToday(int boaTodayNum,int boaId);
    protected abstract List masterArray(int boaId);
    protected abstract void incrementTopicnum(int boaId);
    protected abstract ArrayList getPageBoardChildInfo(int boaParId);
    public abstract Iterator getPageBoardInfo(int boaDepth);
    protected abstract void importXMLInfo(Iterator iterator);
    protected abstract boolean isExistBoard();
    public abstract Iterator exportXMLInfo();
    public abstract Collection showBoaInfo();
    public abstract void incrementRepNum(int boaId);
    public abstract String getMaxBoardId();
    public abstract Collection getBorParENUM();
    public abstract boolean insBoard(Board board);
    public abstract boolean delBoard(int boaId);
    public abstract Board showBoaInfo(int boaId);
    public abstract boolean upBoard(Board board);
    /**
     * 获取UserFactory实例,使用了简单工厂模式
     * @return
     */
    public static BoardFactory getInstance() {
        if (factory == null) {
            //使用synchronzed保证一次只有一个实例能访问DBUser对象
            synchronized (initLock) {
                if (factory == null) {
                    try {
                        //创建DBUser的一个实例
                        Class c = Class.forName(CLASSNAME);
                        factory = (BoardFactory) c.newInstance();
                        logger.info("获取数据库处理的实例成功");
                    }
                    catch (Exception e) {
                        System.err.println(
                            "BoardFactory Exception loading class: " +
                            e.getMessage());
                        e.printStackTrace();
                    }
                }
            }
        }
        return factory;
    }

}