//private Dictionary<string, EntityBase> _dicInstance = new Dictionary<string, EntityBase>();//已经实例化的实体
//private IList _baseList;
/// <summary>
/// 别名映射
/// </summary>
/// <param name="table"></param>
/// <param name="aliasName"></param>
public AliasTableMapping(BQLEntityTableHandle table, TableAliasNameManager belongManager, EntityMappingInfo mappingInfo)
{
_belongManager = belongManager;
_entityInfo = table.GetEntityInfo();
_table = new BQLAliasHandle(table, _belongManager.NextTableAliasName());
_mappingInfo = mappingInfo;
InitParam(table);
}
/// <summary>
/// from关键字
/// </summary>
/// <param name="handle"></param>
/// <returns></returns>
internal override void Tran(KeyWordInfomation info)
{
StringBuilder ret = new StringBuilder();
if (info.AliasManager == null)
{
for (int i = 0; i < _tables.Length; i++)
{
BQLTableHandle table = _tables[i];
string tableName = table.DisplayValue(info);
ret.Append(tableName);
if (i < _tables.Length - 1)
{
ret.Append(",");
}
}
info.Condition.Tables.Append(ret.ToString());
}
else
{
for (int i = 0; i < _tables.Length; i++)
{
BQLTableHandle table = _tables[i];
BQLAliasHandle ahandle = info.AliasManager.GetPrimaryAliasHandle(table);
if (!Buffalo.Kernel.CommonMethods.IsNull(ahandle))
{
_tables[i] = ahandle;
}
}
KeyWordFromItem from = info.AliasManager.ToInnerTable(this, info);
TableAliasNameManager manager = info.AliasManager;
info.AliasManager = null;
Stack <KeyWordFromItem> stkFrom = new Stack <KeyWordFromItem>();
while (from != null)
{
stkFrom.Push(from);
from = from.Previous as KeyWordFromItem;
}
while (stkFrom.Count > 0)
{
from = stkFrom.Pop();
from.Tran(info);
}
info.AliasManager = manager;
}
}
/// <summary>
/// Insert的字段关键字项
/// </summary>
/// <param name="valueHandles">值的集合</param>
/// <param name="previous">上一个关键字</param>
internal KeyWordInsertQueryItem(BQLQuery query, BQLQuery previous)
: base(previous)
{
this._query = new BQLAliasHandle(query, null);
}
/// <summary>
/// 别名查询
/// </summary>
/// <param name="query">查询</param>
/// <param name="asName">别名</param>
/// <returns></returns>
public static BQLAliasHandle TableAs(BQLQuery query, string asName)
{
BQLAliasHandle item = new BQLAliasHandle(query, asName);
return(item);
}
/// <summary>
/// 一个别名表
/// </summary>
/// <param name="table">表</param>
/// <param name="asName">别名</param>
/// <returns></returns>
public static BQLAliasHandle TableAs(BQLEntityTableHandle table, string asName)
{
BQLAliasHandle item = new BQLAliasHandle(table, asName);
return(item);
}
/// <summary>
/// 给这个查询定义一个别名
/// </summary>
/// <param name="asName">别名(如果不想要别名这里为null或"")</param>
/// <returns></returns>
public BQLAliasHandle AS(string asName)
{
BQLAliasHandle item = new BQLAliasHandle(this, asName);
return(item);
}
