using System;
using System.Collections.Generic;
using System.Text;
using System.Data;

namespace Ant.ORM
{
    /// <summary>
    /// 引用对象的关系(扩展对象)
    /// </summary>
    [AttributeUsage(AttributeTargets.Property)]
    public class ReferenceAttribute : Attribute
    {
        private DbType[] _DataType;
        private string[] _ForeignKey;
        private string _ForeignTable;
        private string _Key;
        private string[] _MainKey;
        private string _ShowField;

        /// <summary>
        /// 扩展对象及关联对象
        /// </summary>
        /// <param name="key">关键字</param>
        /// <param name="maintable">主表</param>
        /// <param name="foreignTable">外键所在的表</param>
        /// <param name="mainKey">主表主键</param>
        /// <param name="foreignKey">外键关联的字段</param>
        /// <param name="dataType">数据类型</param>
        /// <param name="showField">显示字段</param>
        public ReferenceAttribute(string key,  string foreignTable, string[] mainKey, string[] foreignKey, DbType[] dataType, string showField)
        {
            this._Key = key;
            this._ForeignTable = foreignTable;
            this._ForeignKey = foreignKey;
            this._MainKey = mainKey;
            this._DataType = dataType;
            this._ShowField = showField;
        }

        /// <summary>
        /// 数据类型
        /// </summary>
        public DbType[] DataType
        {
            get
            {
                return this._DataType;
            }
        }
       

        /// <summary>
        /// 外键
        /// </summary>
        public string[] ForeignKey
        {
            get
            {
                return this._ForeignKey;
            }
        }

        /// <summary>
        /// 外键所在的表
        /// </summary>
        public string ForeignTable
        {
            get
            {
                return this._ForeignTable;
            }
        }

        /// <summary>
        /// 关键字
        /// </summary>
        public string Key
        {
            get
            {
                return this._Key;
            }
        }

        /// <summary>
        /// 主键
        /// </summary>
        public string[] MainKey
        {
            get
            {
                return this._MainKey;
            }
        }

        /// <summary>
        /// 显示值的字段
        /// </summary>
        public string ShowField
        {
            get
            {
                return this._ShowField;
            }
        }
    }
}