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comparison Source/Data/Linq/SqlFunctionAttribute.cs @ 0:f990fcb411a9

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Копия текущей версии из github
author cin
date Thu, 27 Mar 2014 21:46:09 +0400
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-1:000000000000 0:f990fcb411a9
1 using System;
2 using System.Linq;
3 using System.Reflection;
4
5 namespace BLToolkit.Data.Linq
6 {
7 using Data.Sql;
8 using Reflection;
9
10 [SerializableAttribute]
11 [AttributeUsageAttribute(AttributeTargets.Method | AttributeTargets.Property, AllowMultiple = true, Inherited = false)]
12 public class SqlFunctionAttribute : Attribute
13 {
14 public SqlFunctionAttribute()
15 {
16 }
17
18 public SqlFunctionAttribute(string name)
19 {
20 Name = name;
21 }
22
23 public SqlFunctionAttribute(string name, params int[] argIndices)
24 {
25 Name = name;
26 ArgIndices = argIndices;
27 }
28
29 public SqlFunctionAttribute(string sqlProvider, string name)
30 {
31 SqlProvider = sqlProvider;
32 Name = name;
33 }
34
35 public SqlFunctionAttribute(string sqlProvider, string name, params int[] argIndices)
36 {
37 SqlProvider = sqlProvider;
38 Name = name;
39 ArgIndices = argIndices;
40 }
41
42 public string SqlProvider { get; set; }
43 public string Name { get; set; }
44 public bool ServerSideOnly { get; set; }
45 public bool PreferServerSide { get; set; }
46 public int[] ArgIndices { get; set; }
47
48 protected ISqlExpression[] ConvertArgs(MemberInfo member, ISqlExpression[] args)
49 {
50 if (member is MethodInfo)
51 {
52 var method = (MethodInfo)member;
53
54 if (method.DeclaringType.IsGenericType)
55 args = args.Concat(method.DeclaringType.GetGenericArguments().Select(t => (ISqlExpression)SqlDataType.GetDataType(t))).ToArray();
56
57 if (method.IsGenericMethod)
58 args = args.Concat(method.GetGenericArguments().Select(t => (ISqlExpression)SqlDataType.GetDataType(t))).ToArray();
59 }
60
61 if (ArgIndices != null)
62 {
63 var idxs = new ISqlExpression[ArgIndices.Length];
64
65 for (var i = 0; i < ArgIndices.Length; i++)
66 idxs[i] = args[ArgIndices[i]];
67
68 return idxs;
69 }
70
71 return args;
72 }
73
74 public virtual ISqlExpression GetExpression(MemberInfo member, params ISqlExpression[] args)
75 {
76 return new SqlFunction(TypeHelper.GetMemberType(member), Name ?? member.Name, ConvertArgs(member, args));
77 }
78 }
79 }