IMappingObjectExpression VisistMapTypeSelector(Expression exp)
{
if (!MappingTypeSystem.IsMappingType(exp.Type))
{
throw new NotSupportedException(exp.ToString());
}
DbExpression dbExp = this.VisistExpression(exp);
MappingFieldExpression ret = new MappingFieldExpression(exp.Type, dbExp);
return(ret);
}
public IMappingObjectExpression ToNewObjectExpression(DbSqlQueryExpression sqlQuery, DbTable table)
{
DbColumnAccessExpression cae = null;
cae = MappingObjectExpressionHelper.ParseColumnAccessExpression(sqlQuery, table, this._exp);
MappingFieldExpression mf = new MappingFieldExpression(this._type, cae);
mf.NullChecking = MappingObjectExpressionHelper.TryGetOrAddNullChecking(sqlQuery, table, this.NullChecking);
return(mf);
}
/// <summary>
/// a => a.Id a => a.Name a => a.User
/// </summary>
/// <param name="exp"></param>
/// <returns></returns>
protected override IMappingObjectExpression VisitMemberAccess(MemberExpression exp)
{
//create MappingFieldExpression object if exp is map type
if (MappingTypeSystem.IsMappingType(exp.Type))
{
DbExpression dbExp = this.VisistExpression(exp);
MappingFieldExpression ret = new MappingFieldExpression(exp.Type, dbExp);
return(ret);
}
//如 a.Order a.User 等形式
return(this.VisitNavigationMember(exp));
}
