private DbExpression CreateMemberExpression(TranslationContext context, PropertyInfo property, DbExpression subaccess)
{
Type type = property.PropertyType;
return(subaccess.GetOrSetChildren(property, () =>
{
DbExpression item = null;
if (type.IsPrimary())
{
item = new DbMemberExpression(property, subaccess);
}
else if (type.IsComplexCollection())
{
item = new DbCollectionMemberExpression(context, property, subaccess);
}
else
{
item = new DbObjectMemberExpression(context, property, subaccess);
}
return item;
}));
}
//生成复合集合成员虚拟数据源连接。
private ISourceFragment GenerateVirtualCompositeJoinForCollectionMember(GenerateContext context, DbCollectionMemberExpression content, SelectFragment body, bool iscomposite)
{
var relation = CreateSource(context, content.RelationSet);
body.AddSource(relation);
relation.Join = EJoinType.InnerJoin;
var pairs = iscomposite ? content.CompositePairs : content.Pairs;
relation.Condition = pairs.Select(a => body.CreateExpression(a)).Merge();
return(relation);
}
