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1 using System;
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2 using System.Collections.Generic;
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3 using System.Collections.ObjectModel;
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4 using System.Data;
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5 using System.Data.SqlTypes;
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6 using System.IO;
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7 using System.Linq;
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8 using System.Linq.Expressions;
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9 using System.Reflection;
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10 using System.Xml;
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11 #if !SILVERLIGHT
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12 using System.Xml.Linq;
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13 #endif
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14
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15 using LinqBinary = System.Data.Linq.Binary;
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16 using BLToolkit.Reflection;
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17
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18 namespace BLToolkit.Data.Linq
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19 {
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20 public class ReflectionHelper
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21 {
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22 public class Expressor<T>
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23 {
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24 public static FieldInfo FieldExpressor(Expression<Func<T,object>> func)
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25 {
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26 return (FieldInfo)((MemberExpression)((UnaryExpression)func.Body).Operand).Member;
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27 }
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28
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29 public static MethodInfo PropertyExpressor(Expression<Func<T,object>> func)
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30 {
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31 return ((PropertyInfo)((MemberExpression)func.Body).Member).GetGetMethod();
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32 }
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33
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34 public static MethodInfo MethodExpressor(Expression<Func<T,object>> func)
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35 {
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36 var ex = func.Body;
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37
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38 if (ex is UnaryExpression)
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39 ex = ((UnaryExpression)ex).Operand;
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40
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41 //if (ex is MemberExpression)
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42 // return ((PropertyInfo)((MemberExpression)ex).Member).GetGetMethod();
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43
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3
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44 /// HACK
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4
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45 return ExtractMethodInfo ((MethodCallExpression)ex);
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0
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46 }
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47 }
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48
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49 public static MemberInfo MemeberInfo(LambdaExpression func)
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50 {
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51 var ex = func.Body;
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52
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53 if (ex is UnaryExpression)
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54 ex = ((UnaryExpression)ex).Operand;
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55
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56 return
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57 ex is MemberExpression ? ((MemberExpression) ex).Member :
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58 ex is MethodCallExpression ? ExtractMethodInfo((MethodCallExpression)ex) :
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59 (MemberInfo)((NewExpression) ex).Constructor;
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60 }
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61
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3
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62 public static MethodInfo ExtractMethodInfo(MethodCallExpression mce) {
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63 var mi = mce.Method;
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64 if (mi.IsVirtual && mi.DeclaringType != mce.Object.Type && !mce.Object.Type.IsInterface)
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65 mi = mce.Object.Type.GetMethod(mi.Name, mi.GetParameters().Select(p => p.ParameterType).ToArray());
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66
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67 return mi;
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68 }
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69
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70 public class Binary : Expressor<BinaryExpression>
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71 {
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72 public static MethodInfo Conversion = PropertyExpressor(e => e.Conversion);
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73 public static MethodInfo Left = PropertyExpressor(e => e.Left);
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74 public static MethodInfo Right = PropertyExpressor(e => e.Right);
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75 }
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76
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77 public class Unary : Expressor<UnaryExpression>
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78 {
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79 public static MethodInfo Operand = PropertyExpressor(e => e.Operand);
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80 }
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81
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82 public class LambdaExpr : Expressor<LambdaExpression>
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83 {
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84 public static MethodInfo Body = PropertyExpressor(e => e.Body);
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85 public static MethodInfo Parameters = PropertyExpressor(e => e.Parameters);
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86 }
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87
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88 public class Constant : Expressor<ConstantExpression>
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89 {
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90 public static MethodInfo Value = PropertyExpressor(e => e.Value);
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91 }
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92
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93 public class QueryableInt : Expressor<IQueryable>
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94 {
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95 public static MethodInfo Expression = PropertyExpressor(e => e.Expression);
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96 }
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97
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98 public class MethodCall : Expressor<MethodCallExpression>
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99 {
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100 public static MethodInfo Object = PropertyExpressor(e => e.Object);
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101 public static MethodInfo Arguments = PropertyExpressor(e => e.Arguments);
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102 }
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103
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104 public class Conditional : Expressor<ConditionalExpression>
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105 {
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106 public static MethodInfo Test = PropertyExpressor(e => e.Test);
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107 public static MethodInfo IfTrue = PropertyExpressor(e => e.IfTrue);
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108 public static MethodInfo IfFalse = PropertyExpressor(e => e.IfFalse);
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109 }
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110
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111 public class Invocation : Expressor<InvocationExpression>
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112 {
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113 public static MethodInfo Expression = PropertyExpressor(e => e.Expression);
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114 public static MethodInfo Arguments = PropertyExpressor(e => e.Arguments);
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115 }
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116
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117 public class ListInit : Expressor<ListInitExpression>
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118 {
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119 public static MethodInfo NewExpression = PropertyExpressor(e => e.NewExpression);
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120 public static MethodInfo Initializers = PropertyExpressor(e => e.Initializers);
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121 }
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122
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123 public class ElementInit : Expressor<System.Linq.Expressions.ElementInit>
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124 {
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125 public static MethodInfo Arguments = PropertyExpressor(e => e.Arguments);
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126 }
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127
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128 public class Member : Expressor<MemberExpression>
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129 {
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130 public static MethodInfo Expression = PropertyExpressor(e => e.Expression);
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131 }
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132
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133 public class MemberInit : Expressor<MemberInitExpression>
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134 {
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135 public static MethodInfo NewExpression = PropertyExpressor(e => e.NewExpression);
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136 public static MethodInfo Bindings = PropertyExpressor(e => e.Bindings);
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137 }
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138
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139 public class New : Expressor<NewExpression>
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140 {
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141 public static MethodInfo Arguments = PropertyExpressor(e => e.Arguments);
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142 }
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143
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144 public class NewArray : Expressor<NewArrayExpression>
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145 {
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146 public static MethodInfo Expressions = PropertyExpressor(e => e.Expressions);
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147 }
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148
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149 public class TypeBinary : Expressor<TypeBinaryExpression>
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150 {
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151 public static MethodInfo Expression = PropertyExpressor(e => e.Expression);
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152 }
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153
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154 public class IndexExpressor<T>
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155 {
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156 public static MethodInfo IndexerExpressor(Expression<Func<ReadOnlyCollection<T>, object>> func)
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157 {
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158 return ((MethodCallExpression)((UnaryExpression)func.Body).Operand).Method;
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159 }
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160
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161 public static MethodInfo Item = IndexerExpressor(c => c[0]);
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162 }
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163
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164 public class MemberAssignmentBind : Expressor<MemberAssignment>
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165 {
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166 public static MethodInfo Expression = PropertyExpressor(e => e.Expression);
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167 }
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168
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169 public class MemberListBind : Expressor<MemberListBinding>
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170 {
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171 public static MethodInfo Initializers = PropertyExpressor(e => e.Initializers);
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172 }
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173
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174 public class MemberMemberBind : Expressor<MemberMemberBinding>
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175 {
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176 public static MethodInfo Bindings = PropertyExpressor(e => e.Bindings);
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177 }
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178
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179 #if FW4 || SILVERLIGHT
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180
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181 public class Block : Expressor<BlockExpression>
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182 {
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183 public static MethodInfo Expressions = PropertyExpressor(e => e.Expressions);
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184 public static MethodInfo Variables = PropertyExpressor(e => e.Variables);
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185 }
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186
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187 #endif
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188
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189 public static MethodInfo ExprItem = IndexExpressor<Expression> .Item;
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190 public static MethodInfo ParamItem = IndexExpressor<ParameterExpression>.Item;
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191 public static MethodInfo ElemItem = IndexExpressor<ElementInit> .Item;
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192
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193 public class DataReader : Expressor<IDataReader>
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194 {
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195 public static MethodInfo GetValue = MethodExpressor(rd => rd.GetValue(0));
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196 public static MethodInfo IsDBNull = MethodExpressor(rd => rd.IsDBNull(0));
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197 }
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198
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199 internal class QueryCtx : Expressor<QueryContext>
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200 {
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201 public static FieldInfo Counter = FieldExpressor(ctx => ctx.Counter);
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202 }
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203
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204 public class MapSchema : Expressor<Mapping.MappingSchema>
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205 {
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206 public static MethodInfo MapValueToEnum = MethodExpressor(m => m.MapValueToEnum(null, (Type)null));
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207 public static MethodInfo MapValueToEnumWithMemberAccessor = MethodExpressor(m => m.MapValueToEnum(null, (MemberAccessor)null));
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208 public static MethodInfo ChangeType = MethodExpressor(m => m.ConvertChangeType(null, null));
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209
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210 public static Dictionary<Type,MethodInfo> Converters = new Dictionary<Type,MethodInfo>
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211 {
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212 // Primitive Types
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213 //
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214 { typeof(SByte), MethodExpressor(m => m.ConvertToSByte (null)) },
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215 { typeof(Int16), MethodExpressor(m => m.ConvertToInt16 (null)) },
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216 { typeof(Int32), MethodExpressor(m => m.ConvertToInt32 (null)) },
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217 { typeof(Int64), MethodExpressor(m => m.ConvertToInt64 (null)) },
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218 { typeof(Byte), MethodExpressor(m => m.ConvertToByte (null)) },
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219 { typeof(UInt16), MethodExpressor(m => m.ConvertToUInt16 (null)) },
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220 { typeof(UInt32), MethodExpressor(m => m.ConvertToUInt32 (null)) },
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221 { typeof(UInt64), MethodExpressor(m => m.ConvertToUInt64 (null)) },
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222 { typeof(Char), MethodExpressor(m => m.ConvertToChar (null)) },
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223 { typeof(Single), MethodExpressor(m => m.ConvertToSingle (null)) },
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224 { typeof(Double), MethodExpressor(m => m.ConvertToDouble (null)) },
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225 { typeof(Boolean), MethodExpressor(m => m.ConvertToBoolean (null)) },
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226
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227 // Simple Types
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228 //
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229 { typeof(String), MethodExpressor(m => m.ConvertToString (null)) },
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230 { typeof(DateTime), MethodExpressor(m => m.ConvertToDateTime (null)) },
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231 { typeof(TimeSpan), MethodExpressor(m => m.ConvertToTimeSpan (null)) },
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232 { typeof(DateTimeOffset), MethodExpressor(m => m.ConvertToDateTimeOffset (null)) },
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233 { typeof(Decimal), MethodExpressor(m => m.ConvertToDecimal (null)) },
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234 { typeof(Guid), MethodExpressor(m => m.ConvertToGuid (null)) },
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235 { typeof(Stream), MethodExpressor(m => m.ConvertToStream (null)) },
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236 #if !SILVERLIGHT
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237 { typeof(XmlReader), MethodExpressor(m => m.ConvertToXmlReader (null)) },
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238 { typeof(XmlDocument), MethodExpressor(m => m.ConvertToXmlDocument (null)) },
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239 { typeof(XElement), MethodExpressor(m => m.ConvertToXElement (null)) },
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240 #endif
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241 { typeof(Byte[]), MethodExpressor(m => m.ConvertToByteArray (null)) },
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242 { typeof(LinqBinary), MethodExpressor(m => m.ConvertToLinqBinary (null)) },
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243 { typeof(Char[]), MethodExpressor(m => m.ConvertToCharArray (null)) },
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244
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245 // Nullable Types
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246 //
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247 { typeof(SByte?), MethodExpressor(m => m.ConvertToNullableSByte (null)) },
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248 { typeof(Int16?), MethodExpressor(m => m.ConvertToNullableInt16 (null)) },
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249 { typeof(Int32?), MethodExpressor(m => m.ConvertToNullableInt32 (null)) },
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250 { typeof(Int64?), MethodExpressor(m => m.ConvertToNullableInt64 (null)) },
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251 { typeof(Byte?), MethodExpressor(m => m.ConvertToNullableByte (null)) },
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252 { typeof(UInt16?), MethodExpressor(m => m.ConvertToNullableUInt16 (null)) },
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253 { typeof(UInt32?), MethodExpressor(m => m.ConvertToNullableUInt32 (null)) },
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254 { typeof(UInt64?), MethodExpressor(m => m.ConvertToNullableUInt64 (null)) },
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255 { typeof(Char?), MethodExpressor(m => m.ConvertToNullableChar (null)) },
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256 { typeof(Double?), MethodExpressor(m => m.ConvertToNullableDouble (null)) },
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257 { typeof(Single?), MethodExpressor(m => m.ConvertToNullableSingle (null)) },
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258 { typeof(Boolean?), MethodExpressor(m => m.ConvertToNullableBoolean (null)) },
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259 { typeof(DateTime?), MethodExpressor(m => m.ConvertToNullableDateTime (null)) },
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260 { typeof(TimeSpan?), MethodExpressor(m => m.ConvertToNullableTimeSpan (null)) },
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261 { typeof(DateTimeOffset?), MethodExpressor(m => m.ConvertToNullableDateTimeOffset(null)) },
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262 { typeof(Decimal?), MethodExpressor(m => m.ConvertToNullableDecimal (null)) },
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263 { typeof(Guid?), MethodExpressor(m => m.ConvertToNullableGuid (null)) },
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264
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265 #if !SILVERLIGHT
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266
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267 // SqlTypes
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268 //
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269 { typeof(SqlByte), MethodExpressor(m => m.ConvertToSqlByte (null)) },
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270 { typeof(SqlInt16), MethodExpressor(m => m.ConvertToSqlInt16 (null)) },
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271 { typeof(SqlInt32), MethodExpressor(m => m.ConvertToSqlInt32 (null)) },
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272 { typeof(SqlInt64), MethodExpressor(m => m.ConvertToSqlInt64 (null)) },
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273 { typeof(SqlSingle), MethodExpressor(m => m.ConvertToSqlSingle (null)) },
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274 { typeof(SqlBoolean), MethodExpressor(m => m.ConvertToSqlBoolean (null)) },
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275 { typeof(SqlDouble), MethodExpressor(m => m.ConvertToSqlDouble (null)) },
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276 { typeof(SqlDateTime), MethodExpressor(m => m.ConvertToSqlDateTime (null)) },
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277 { typeof(SqlDecimal), MethodExpressor(m => m.ConvertToSqlDecimal (null)) },
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278 { typeof(SqlMoney), MethodExpressor(m => m.ConvertToSqlMoney (null)) },
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279 { typeof(SqlString), MethodExpressor(m => m.ConvertToSqlString (null)) },
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280 { typeof(SqlBinary), MethodExpressor(m => m.ConvertToSqlBinary (null)) },
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281 { typeof(SqlGuid), MethodExpressor(m => m.ConvertToSqlGuid (null)) },
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282 { typeof(SqlBytes), MethodExpressor(m => m.ConvertToSqlBytes (null)) },
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283 { typeof(SqlChars), MethodExpressor(m => m.ConvertToSqlChars (null)) },
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284 { typeof(SqlXml), MethodExpressor(m => m.ConvertToSqlXml (null)) },
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285
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286 #endif
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287 };
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288 }
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289
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290 public class Functions
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291 {
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292 public class String : Expressor<string>
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293 {
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294 //public static MethodInfo Contains = MethodExpressor(s => s.Contains(""));
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295 //public static MethodInfo StartsWith = MethodExpressor(s => s.StartsWith(""));
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296 //public static MethodInfo EndsWith = MethodExpressor(s => s.EndsWith(""));
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297
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298 #if !SILVERLIGHT
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299 public static MethodInfo Like11 = MethodExpressor(s => System.Data.Linq.SqlClient.SqlMethods.Like("", ""));
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300 public static MethodInfo Like12 = MethodExpressor(s => System.Data.Linq.SqlClient.SqlMethods.Like("", "", ' '));
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301 #endif
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302
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303 public static MethodInfo Like21 = MethodExpressor(s => Sql.Like(s, ""));
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304 public static MethodInfo Like22 = MethodExpressor(s => Sql.Like(s, "", ' '));
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305 }
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306 }
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307 }
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308 }
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