abstractservice.cs

本在线考试系统采用了面向对象的分析和设计

using System;
using System.Collections.Generic;
using System.Text;
using ExaminationSystem.BLL.DataInterface;
using ExaminationSystem.BLL.Domain;

namespace ExaminationSystem.BLL.Service
{
    public class AbstractService<DomainType,DaoType>
    {
        protected static IDao<DomainType, long> Dao = (IDao<DomainType, long>)DaoManager.GetDao(typeof(DaoType));

        public  DomainType GetById(long id)
        {
            return Dao.GetById(id, false);
        }
        public virtual  void DeleteById(long id)
        {
            DomainType obj = Dao.GetById(id, true);
            Dao.Delete(obj);
            Dao.CommitChanges();
        }
        public virtual  void Update(DomainType obj)
        {
            Dao.SaveOrUpdate(obj);
        }
        public  IList<DomainType> GetAll()
        {
            return Dao.GetAll();
        }
        public  IList<DomainType> GetByExample(DomainType obj, params string[] propertiesToExclude)
        {
            return Dao.GetByExample(obj, propertiesToExclude);
        }
        public  DomainType GetUniqueByExample(DomainType obj, params string[] propertiesToExclude)
        {
            return Dao.GetUniqueByExample(obj, propertiesToExclude);
        }
        public virtual  void Save(DomainType obj)
        {
            Dao.Save(obj);
        }
        public  void CommitChanges()
        {
            Dao.CommitChanges();
        }
    }

    //**************************************************************
    public class ChapterService : AbstractService<Chapter, IChapterDao>{}
  
    public class DanXuanContentService : AbstractService<DanXuanContent, IDanXuanContentDao>{}
    public class DuoXuanContentService : AbstractService<DuoXuanContent, IDuoXuanContentDao> {}
    
    public class PanDuanContentService : AbstractService<PanDuanContent, IPanDuoContentDao> { }
    public class TianKongContentService : AbstractService<TianKongContent, ITianKongContentDao> { }
    public class JianDaContentService : AbstractService<JianDaContent, IJianDaContentDao> { }
    

    public class PaperStrategyService : AbstractService<PaperStrategy, IPaperStrategyDao> { }
    public class StrategyContainerService : AbstractService<StrategyContainer, IStrategyContainerDao> { }
    public class StrategyItemService : AbstractService<StrategyItem, IStrategyItemDao> { }
   
    public class PaperService : AbstractService<Paper, IPaperDao> { }
   
    public class TeacherService : AbstractService<Teacher, ITeacherDao> 
    {
        public override void Save(Teacher obj)
        {
            Teacher exmple = new Teacher();
            exmple.LoginName = obj.LoginName;
            if (Dao.GetUniqueByExample(exmple) != null)
                throw new Exception("教师登陆用户名重复!");
            base.Save(obj);
        }
    }
    public class AdminService : AbstractService<Admin, IAdminDao> 
    {
        public override void Save(Admin obj)
        {
            Admin exmple = new Admin();
            exmple.LoginName = obj.LoginName;
            if (Dao.GetUniqueByExample(exmple) != null)
                throw new Exception("管理员登陆用户名重复!");
            base.Save(obj);
        }
    }
    public class StudentService : AbstractService<Student, IStudentDao>
    {
        public override void Save(Student obj)
        {
            Student exmple = new Student();
            exmple.StudentID = obj.StudentID;
            if (Dao.GetUniqueByExample(exmple) != null)
                throw new Exception("学生学号不能重复!");
            base.Save(obj);
        }
    }

    //*************************************************************
}