agendaservice.java

来自「Java编写个人日程管理工具, 具有添加编辑日程和自动适应功能, 程序包含完整的」· Java 代码 · 共 220 行

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package logical;

import java.util.Enumeration;
import java.util.Date;
import java.util.ArrayList;
import exception.TimeOverlapException;
import exception.MeetingException;
import exception.UserException;
import exception.WrongTimeException;
/**
 * 这个类是管理agenda的所有操作和异常，同时维护用户和会议管理表
 * @author zouhao
 */
public class AgendaService {
    MeetingManager meetingmanager;
    UserManager usermanager;
   
    /**
     * AgendaService构造函数
     */
    AgendaService()
    {
        meetingmanager=new MeetingManager();
        usermanager=new UserManager();
    }
    private static AgendaService instance = null;
    /**
     * 此方法是为了实现AgendaService的Singleton
     * @return
     */
    public static synchronized AgendaService getInstance() {
        if (instance==null)
        {
            instance=new AgendaService();
        }
        return instance;
    } 
    /**
     * 这个方法用于管理添加操作，判断用户，会议的合法性，并控制下层进行具体操作
     * @param username 用户名
     * @param password 用户密码
     * @param label 会议标签
     * @param callee 会议参与者
     * @param starttime 会议开始时间
     * @param endtime 会议结束时间
     */
    public boolean Add(String username,String password,String label,String callee,Date starttime,Date endtime)
    {
        boolean success = true;
        try{
            if(usermanager.GetUserByName(username)!=null&&usermanager.GetUserByName(callee)!=null)
            {
                if(usermanager.ChecUser(username, password))
                {
                    if(!meetingmanager.CheckMeeting(label))
                    {
                        TimeInterval tempt = new TimeInterval(starttime,endtime);
                        Enumeration en = meetingmanager.meetinglist.elements();
                        while (en.hasMoreElements()) {
                            Meeting temp = (Meeting)en.nextElement();
                            if(temp.caller.username.equalsIgnoreCase(username)||temp.callee.username.equalsIgnoreCase(username))
                            {
                                if(temp.time.IsOverlaped(tempt))
                                {
                                    success = false;
                                    throw new TimeOverlapException();
                                }
                            }
                            if(temp.caller.username.equalsIgnoreCase(callee)||temp.callee.username.equalsIgnoreCase(callee))
                            {
                                if(temp.time.IsOverlaped(tempt))
                                {
                                    success = false;
                                    throw new TimeOverlapException();
                                }
                            }
                        }
                        if(starttime.before(endtime))
                        meetingmanager.AddAgenda(label, starttime, endtime,usermanager.GetUserByName(username),usermanager.GetUserByName(callee));
                        else {throw new WrongTimeException();}
                    }
                    else {success = false;throw new MeetingException("already exists");}
                }
                else {success = false;throw new UserException("wrong password");}
            }
            else {success = false;throw new UserException("not exists");}
        }
        catch (Exception e){}
        return success;
    }
    /**
     * 这个方法用于管理用户注册操作，判断用户的合法性，并控制下层进行具体操作
     * @param username 用户名
     * @param password 用户密码
     */
    public boolean Register(String username,String password)
    {
        boolean success = true;
        try{
            if(usermanager.GetUserByName(username)==null)
            {
                if(!usermanager.IsTooShort(password))
                {
                    usermanager.Register(username, password);
                }
                else {success = false;throw new UserException("short password");}
            }
            else {success = false;throw new UserException("is exists");}
        }
        catch(Exception e){}
        return success;
    }
     /**
     * 这个方法用于管理删除操作，判断用户的合法性，并控制下层进行具体操作
     * @param username 用户名
     * @param password 用户密码
     * @param label 会议标签
     */
    public boolean Delete(String username,String password,String label)
    {
        boolean success = true;
        try{
            if(usermanager.GetUserByName(username)!=null)
            {
                if(usermanager.ChecUser(username, password))
                {
                    if(meetingmanager.CheckMeeting(label))
                    {
                        if(meetingmanager.GetUserByName(label).caller.username.equalsIgnoreCase(username))
                            meetingmanager.DeleteAgenda(label);
                         else {success = false;throw new MeetingException("not yours");}
                    }
                    else {success = false;throw new MeetingException("not exists");}
                }
                else {success = false;throw new UserException("wrong password");}
            }
            else {throw new UserException("not exists");}
        }
        catch(Exception e){}
        return success;
    }
    /**
     * 这个方法用于清除用户所创建的所有会议
     * @param username 用户名
     * @param password 用户密码
     */
    public boolean Clear(String username,String password)
    {
        boolean success = true;
        try{
            if(usermanager.GetUserByName(username)!=null)
            {
                if(usermanager.ChecUser(username, password))
                {
                     Enumeration en = meetingmanager.meetinglist.elements();
                        while (en.hasMoreElements()) {
                            Meeting temp = (Meeting)en.nextElement();
                            if(temp.caller.username.equalsIgnoreCase(username))
                            {
                                meetingmanager.DeleteAgenda(temp.label);
                            }
                        }
                }else {success = false;throw new UserException("wrong password");}
            }else {success = false;throw new UserException("not exists");}
        }
        catch(Exception e){}
        return success;
    }
    /**
     * 这个方法用于提供查询功能，查询输入的时间段的所有会议
     * @param username 用户名
     * @param password 用户密码
     * @param starttime 会议开始时间
     * @param endtime 会议结束时间
     */
    public ArrayList Query(String username,String password,Date starttime,Date endtime)
    {
        try{
            ArrayList<Meeting> templist = new ArrayList();
            if(usermanager.GetUserByName(username)!=null)
            {
                if(usermanager.ChecUser(username, password))
                {
                        Enumeration en = meetingmanager.meetinglist.elements();
                        while (en.hasMoreElements()) {
                            Meeting temp = (Meeting)en.nextElement();
                            if(temp.time.IsContian(starttime, endtime))
                            {
                                    templist.add(temp);
                            }
                        }
                        return templist;
                }else {throw new UserException("wrong password");}
            }else {throw new UserException("not exists");}
        }
        catch (Exception e){}
        return null;
    }
    
     /**
     * 这方法用于在屏幕显示对象信息
     * @return 返回字符串
     */
    public String ToString(String type)
    {
        if(type.equals("Meeting"))
            return meetingmanager.ToString();
        else if(type.equals("User"))
            return usermanager.ToString();
        else if(type.equals(""))
            return "";
        else return "Fail to ToString";
    }
}