/// <inheritdoc/>
public override void Inititalze(DbExpression content = null)
{
base.Inititalze(content);
if (Table.InheritSets.Length > 0 && Statement.DbSet.Name != null)
{
throw new NotSupportedException(Res.NotSupportedInheritSetUsingDbName);
}
var item = ((DbUnitTypeExpression)content).Item;
if (Operate.Type == EOperateType.DeleteStatement)
{
if (item is DbUnitItemContentExpression itemcontent)
{
item = itemcontent.Content;
}
if (item.ExpressionType != EExpressionType.DataItem)
{
throw new GenerateException(Res.ExceptionUnitItemIsMustDataItem);
}
}
else
{
if (!(content is DbSelectExpression unittype))
{
throw new ArgumentException(Res.ExceptionInsertContentIsSelect, nameof(content));
}
if (!(item is DbNewExpression newitem))
{
throw new GenerateException(Res.ExceptionInsertItemIsMustNew);
}
}
ItemEpxression = item;
}
/// <summary>
/// 创建分组项表达式。
/// </summary>
/// <param name="unititem">单元项表达式。</param>
public DbGroupItemExpression(DbUnitItemTypeExpression unititem)
: base(unititem.ClrType)
{
Source = unititem;
Item = new DbDataItemExpression(unititem.ClrType)
{
Unit = this
};
}
/// <summary>
/// 创建数据项内容表达式。
/// </summary>
/// <param name="content">当前内容表达式。</param>
public DbUnitItemContentExpression(DbUnitItemTypeExpression content)
: base(content.ClrType)
{
Content = content;
}
/// <summary>
/// 创建分组并连接表达式。
/// </summary>
/// <param name="source">源表达式。</param>
/// <param name="target">目标表达式。</param>
/// <param name="left">左端键表达式。</param>
/// <param name="right">右端键表达式。</param>
/// <param name="newExp">当前连接后输出的新对象表达工。</param>
public DbGroupJoinExpression(DbUnitTypeExpression source, DbUnitTypeExpression target, DbExpression left, DbExpression right, DbUnitItemTypeExpression newExp)
: base(source, target, left, right, newExp)
{
}
