1 #region MIT license
2 //
3 // MIT license
4 //
5 // Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
6 //
7 // Permission is hereby granted, free of charge, to any person obtaining a copy
8 // of this software and associated documentation files (the "Software"), to deal
9 // in the Software without restriction, including without limitation the rights
10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 // copies of the Software, and to permit persons to whom the Software is
12 // furnished to do so, subject to the following conditions:
13 //
14 // The above copyright notice and this permission notice shall be included in
15 // all copies or substantial portions of the Software.
16 //
17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 // THE SOFTWARE.
24 //
25 #endregion
26 
27 using System.Linq.Expressions;
28 
29 namespace DbLinq.Data.Linq.Sugar
30 {
31     internal interface IExpressionQualifier
32     {
33         /// <summary>
34         /// Returns Expression precedence. Higher value means lower precedence.
35         /// http://en.csharp-online.net/ECMA-334:_14.2.1_Operator_precedence_and_associativity
36         /// We added the Clase precedence, which is the lowest
37         /// </summary>
38         /// <param name="expression"></param>
39         /// <returns></returns>
GetPrecedence(Expression expression)40         ExpressionPrecedence GetPrecedence(Expression expression);
41 
42         /// <summary>
43         /// Determines wether an expression can run in Clr or Sql
44         /// A request is valid is it starts with Clr only, followed by Any and ends (at bottom) with Sql.
45         /// With this, we can:
46         /// - Find the first point cut from Clr to Any
47         /// - Find the second point cut from Any to Sql
48         /// Select a strategy to load more or less the Clr or Sql engine
49         /// This is used only for SELECT clause
50         /// </summary>
51         /// <param name="expression"></param>
52         /// <returns></returns>
GetTier(Expression expression)53         ExpressionTier GetTier(Expression expression);
54     }
55 }