using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Dao
{
    public interface IRepository<T> where T : class
    {
        /// <summary>
        /// 获取实体
        /// </summary>
        /// <param name="id">主键</param>
        /// <returns>实体</returns>
        T Get(object id);

        /// <summary>
        /// 获取实体
        /// </summary>
        /// <param name="id">主键</param>
        /// <returns>实体</returns>
        T Load(object id);

        /// <summary>
        /// 插入实体
        /// </summary>
        /// <param name="entity">实体</param>
        /// <returns>ID</returns>
        object Save(T entity);

        /// <summary>
        /// 修改实体
        /// </summary>
        /// <param name="entity">实体</param>
        void Update(T entity);

		/// <summary>
		/// 批量修改实体
		/// </summary>
		/// <param name="entity">实体</param>
        void Update(IList<T> entities);

        /// <summary>
        /// 通过sql自定义语句更新数据
        /// </summary>
        /// <param name="sql">sql语句</param>
        void Update(string sql);

        /// <summary>
        /// 修改或保存实体
        /// </summary>
        /// <param name="entity">实体</param>
        void SaveOrUpdate(T entity);

        /// <summary>
        /// 删除实体
        /// </summary>
        /// <param name="id">ID</param>
        void Delete(object id);

        /// <summary>
        /// 删除实体
        /// </summary>
        /// <param name="idList">ID集合</param>
        void Delete(IList<object> idList);

        /// <summary>
        /// 获取全部集合
        /// </summary>
        /// <returns>集合</returns>
        IQueryable<T> LoadAll();

		/// <summary>
		/// 获取全部集合
		/// </summary>
		/// <returns>集合</returns>
		IQueryable<T> LoadAllFromCache();

        /// <summary>
        /// 分页获取全部集合
        /// </summary>
        /// <param name="count">记录总数</param>
        /// <param name="pageIndex">页码</param>
        /// <param name="pageSize">每页大小</param>
        /// <returns>集合</returns>
        IQueryable<T> LoadAllWithPage(out long count, int pageIndex, int pageSize);
    }
}