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1 using System;
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2 using System.Data.SqlTypes;
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3 using System.Linq.Expressions;
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4 using System.Reflection;
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5 using System.ComponentModel;
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6 using BLToolkit.Data.Linq;
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7
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8 #if !SILVERLIGHT && !DATA
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9 using BLToolkit.ComponentModel;
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10 #endif
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11
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12 namespace BLToolkit.Reflection
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13 {
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14 public abstract class MemberAccessor
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15 {
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16 protected MemberAccessor(TypeAccessor typeAccessor, MemberInfo memberInfo)
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17 {
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18 TypeAccessor = typeAccessor;
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19 MemberInfo = memberInfo;
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20 }
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21
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22 #region Public Properties
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23
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24 public MemberInfo MemberInfo { get; private set; }
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25 public TypeAccessor TypeAccessor { get; private set; }
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26
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27 #if !SILVERLIGHT && !DATA
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28
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29 private PropertyDescriptor _propertyDescriptor;
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30 public PropertyDescriptor PropertyDescriptor
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31 {
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32 get
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33 {
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34 if (_propertyDescriptor == null)
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35 _propertyDescriptor = new MemberPropertyDescriptor(TypeAccessor.OriginalType, Name);
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36
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37 return _propertyDescriptor;
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38 }
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39 }
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40
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41 #endif
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42
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43 public virtual bool HasGetter { get { return false; } }
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44 public virtual bool HasSetter { get { return false; } }
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45
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46 public Type Type
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47 {
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48 get
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49 {
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50 return MemberInfo is PropertyInfo?
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51 ((PropertyInfo)MemberInfo).PropertyType:
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52 ((FieldInfo) MemberInfo).FieldType;
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53 }
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54 }
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55
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56 public string Name
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57 {
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58 get { return MemberInfo.Name; }
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59 }
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60
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61 private Type _underlyingType;
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62 public Type UnderlyingType
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63 {
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64 get { return _underlyingType ?? (_underlyingType = TypeHelper.GetUnderlyingType(Type)); }
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65 }
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66
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67 #endregion
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68
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69 #region Public Methods
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70
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71 public bool IsDefined<T>() where T : Attribute
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72 {
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73 return MemberInfo.IsDefined(typeof(T), true);
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74 }
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75
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76 [Obsolete("Use generic version instead")]
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77 public Attribute GetAttribute(Type attributeType)
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78 {
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79 var attrs = MemberInfo.GetCustomAttributes(attributeType, true);
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80
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81 return attrs.Length > 0? (Attribute)attrs[0]: null;
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82 }
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83
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84 public T GetAttribute<T>() where T : Attribute
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85 {
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86 var attrs = MemberInfo.GetCustomAttributes(typeof(T), true);
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87
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88 return attrs.Length > 0? (T)attrs[0]: null;
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89 }
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90
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91 [Obsolete("Use generic version instead")]
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92 public object[] GetAttributes(Type attributeType)
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93 {
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94 var attrs = MemberInfo.GetCustomAttributes(attributeType, true);
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95
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96 return attrs.Length > 0? attrs: null;
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97 }
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98
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99 public T[] GetAttributes<T>() where T : Attribute
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100 {
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101 Array attrs = MemberInfo.GetCustomAttributes(typeof(T), true);
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102
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103 return attrs.Length > 0? (T[])attrs: null;
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104 }
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105
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106 public object[] GetAttributes()
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107 {
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108 var attrs = MemberInfo.GetCustomAttributes(true);
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109
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110 return attrs.Length > 0? attrs: null;
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111 }
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112
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113 public object[] GetTypeAttributes(Type attributeType)
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114 {
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115 return TypeHelper.GetAttributes(TypeAccessor.OriginalType, attributeType);
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116 }
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117
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118 #endregion
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119
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120 #region Set/Get Value
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121
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122 public virtual Boolean IsNull(object o)
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123 {
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124 return true;
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125 }
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126
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127 static object GetDefaultValue<T>()
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128 {
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129 return default(T);
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130 }
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131
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132 object _defaultValue;
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133
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134 public virtual object GetValue(object o)
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135 {
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136 if (_defaultValue == null && Type.IsValueType && !TypeHelper.IsNullableType(Type))
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137 {
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138 var mi = ReflectionHelper.Expressor<object>.MethodExpressor(_ => GetDefaultValue<int>());
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139
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140 _defaultValue =
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141 Expression.Lambda<Func<object>>(
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142 Expression.Call(mi.GetGenericMethodDefinition().MakeGenericMethod(Type)))
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143 .Compile()();
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144 }
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145
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146 return _defaultValue;
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147 }
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148
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149 public virtual void SetValue(object o, object value)
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150 {
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151 }
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152
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153 public virtual void CloneValue(object source, object dest)
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154 {
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155 var value = GetValue(source);
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156
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157 SetValue(dest, value is ICloneable? ((ICloneable)value).Clone(): value);
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158 }
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159
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160
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161 // Simple types getters.
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162 //
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163 [CLSCompliant(false)]
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164 public virtual SByte GetSByte (object o) { return (SByte) GetValue(o); }
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165 public virtual Int16 GetInt16 (object o) { return (Int16) GetValue(o); }
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166 public virtual Int32 GetInt32 (object o) { return (Int32) GetValue(o); }
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167 public virtual Int64 GetInt64 (object o) { return (Int64) GetValue(o); }
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168
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169 public virtual Byte GetByte (object o) { return (Byte) GetValue(o); }
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170 [CLSCompliant(false)]
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171 public virtual UInt16 GetUInt16 (object o) { return (UInt16) GetValue(o); }
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172 [CLSCompliant(false)]
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173 public virtual UInt32 GetUInt32 (object o) { return (UInt32) GetValue(o); }
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174 [CLSCompliant(false)]
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175 public virtual UInt64 GetUInt64 (object o) { return (UInt64) GetValue(o); }
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176
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177 public virtual Boolean GetBoolean (object o) { return (Boolean) GetValue(o); }
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178 public virtual Char GetChar (object o) { return (Char) GetValue(o); }
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179 public virtual Single GetSingle (object o) { return (Single) GetValue(o); }
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180 public virtual Double GetDouble (object o) { return (Double) GetValue(o); }
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181 public virtual Decimal GetDecimal (object o) { return (Decimal) GetValue(o); }
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182 public virtual Guid GetGuid (object o) { return (Guid) GetValue(o); }
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183 public virtual DateTime GetDateTime(object o) { return (DateTime)GetValue(o); }
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184 public virtual TimeSpan GetTimeSpan(object o) { return (TimeSpan)GetValue(o); }
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185 public virtual DateTimeOffset GetDateTimeOffset(object o) { return (DateTimeOffset)GetValue(o); }
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186
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187 // Nullable types getters.
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188 //
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189 [CLSCompliant(false)]
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190 public virtual SByte? GetNullableSByte (object o) { return (SByte?) GetValue(o); }
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191 public virtual Int16? GetNullableInt16 (object o) { return (Int16?) GetValue(o); }
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192 public virtual Int32? GetNullableInt32 (object o) { return (Int32?) GetValue(o); }
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193 public virtual Int64? GetNullableInt64 (object o) { return (Int64?) GetValue(o); }
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194
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195 public virtual Byte? GetNullableByte (object o) { return (Byte?) GetValue(o); }
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196 [CLSCompliant(false)]
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197 public virtual UInt16? GetNullableUInt16 (object o) { return (UInt16?) GetValue(o); }
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198 [CLSCompliant(false)]
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199 public virtual UInt32? GetNullableUInt32 (object o) { return (UInt32?) GetValue(o); }
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200 [CLSCompliant(false)]
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201 public virtual UInt64? GetNullableUInt64 (object o) { return (UInt64?) GetValue(o); }
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202
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203 public virtual Boolean? GetNullableBoolean (object o) { return (Boolean?) GetValue(o); }
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204 public virtual Char? GetNullableChar (object o) { return (Char?) GetValue(o); }
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205 public virtual Single? GetNullableSingle (object o) { return (Single?) GetValue(o); }
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206 public virtual Double? GetNullableDouble (object o) { return (Double?) GetValue(o); }
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207 public virtual Decimal? GetNullableDecimal (object o) { return (Decimal?) GetValue(o); }
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208 public virtual Guid? GetNullableGuid (object o) { return (Guid?) GetValue(o); }
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209 public virtual DateTime? GetNullableDateTime(object o) { return (DateTime?)GetValue(o); }
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210 public virtual TimeSpan? GetNullableTimeSpan(object o) { return (TimeSpan?)GetValue(o); }
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211 public virtual DateTimeOffset? GetNullableDateTimeOffset(object o) { return (DateTimeOffset?)GetValue(o); }
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212
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213 #if !SILVERLIGHT
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214
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215 // SQL type getters.
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216 //
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217 public virtual SqlByte GetSqlByte (object o) { return (SqlByte) GetValue(o); }
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218 public virtual SqlInt16 GetSqlInt16 (object o) { return (SqlInt16) GetValue(o); }
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219 public virtual SqlInt32 GetSqlInt32 (object o) { return (SqlInt32) GetValue(o); }
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220 public virtual SqlInt64 GetSqlInt64 (object o) { return (SqlInt64) GetValue(o); }
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221 public virtual SqlSingle GetSqlSingle (object o) { return (SqlSingle) GetValue(o); }
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222 public virtual SqlBoolean GetSqlBoolean (object o) { return (SqlBoolean) GetValue(o); }
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223 public virtual SqlDouble GetSqlDouble (object o) { return (SqlDouble) GetValue(o); }
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224 public virtual SqlDateTime GetSqlDateTime(object o) { return (SqlDateTime)GetValue(o); }
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225 public virtual SqlDecimal GetSqlDecimal (object o) { return (SqlDecimal) GetValue(o); }
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226 public virtual SqlMoney GetSqlMoney (object o) { return (SqlMoney) GetValue(o); }
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227 public virtual SqlGuid GetSqlGuid (object o) { return (SqlGuid) GetValue(o); }
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228 public virtual SqlString GetSqlString (object o) { return (SqlString) GetValue(o); }
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229
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230 #endif
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231
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232 // Simple type setters.
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233 //
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234 [CLSCompliant(false)]
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235 public virtual void SetSByte (object o, SByte value) { SetValue(o, value); }
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236 public virtual void SetInt16 (object o, Int16 value) { SetValue(o, value); }
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237 public virtual void SetInt32 (object o, Int32 value) { SetValue(o, value); }
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238 public virtual void SetInt64 (object o, Int64 value) { SetValue(o, value); }
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239
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240 public virtual void SetByte (object o, Byte value) { SetValue(o, value); }
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241 [CLSCompliant(false)]
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242 public virtual void SetUInt16 (object o, UInt16 value) { SetValue(o, value); }
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243 [CLSCompliant(false)]
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244 public virtual void SetUInt32 (object o, UInt32 value) { SetValue(o, value); }
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245 [CLSCompliant(false)]
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246 public virtual void SetUInt64 (object o, UInt64 value) { SetValue(o, value); }
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247
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248 public virtual void SetBoolean (object o, Boolean value) { SetValue(o, value); }
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249 public virtual void SetChar (object o, Char value) { SetValue(o, value); }
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250 public virtual void SetSingle (object o, Single value) { SetValue(o, value); }
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251 public virtual void SetDouble (object o, Double value) { SetValue(o, value); }
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252 public virtual void SetDecimal (object o, Decimal value) { SetValue(o, value); }
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253 public virtual void SetGuid (object o, Guid value) { SetValue(o, value); }
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254 public virtual void SetDateTime(object o, DateTime value) { SetValue(o, value); }
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255 public virtual void SetTimeSpan(object o, TimeSpan value) { SetValue(o, value); }
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256 public virtual void SetDateTimeOffset(object o, DateTimeOffset value) { SetValue(o, value); }
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257
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258 // Simple type setters.
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259 //
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260 [CLSCompliant(false)]
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261 public virtual void SetNullableSByte (object o, SByte? value) { SetValue(o, value); }
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262 public virtual void SetNullableInt16 (object o, Int16? value) { SetValue(o, value); }
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263 public virtual void SetNullableInt32 (object o, Int32? value) { SetValue(o, value); }
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264 public virtual void SetNullableInt64 (object o, Int64? value) { SetValue(o, value); }
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265
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266 public virtual void SetNullableByte (object o, Byte? value) { SetValue(o, value); }
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267 [CLSCompliant(false)]
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268 public virtual void SetNullableUInt16 (object o, UInt16? value) { SetValue(o, value); }
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269 [CLSCompliant(false)]
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270 public virtual void SetNullableUInt32 (object o, UInt32? value) { SetValue(o, value); }
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271 [CLSCompliant(false)]
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272 public virtual void SetNullableUInt64 (object o, UInt64? value) { SetValue(o, value); }
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273
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274 public virtual void SetNullableBoolean (object o, Boolean? value) { SetValue(o, value); }
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275 public virtual void SetNullableChar (object o, Char? value) { SetValue(o, value); }
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276 public virtual void SetNullableSingle (object o, Single? value) { SetValue(o, value); }
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277 public virtual void SetNullableDouble (object o, Double? value) { SetValue(o, value); }
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278 public virtual void SetNullableDecimal (object o, Decimal? value) { SetValue(o, value); }
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279 public virtual void SetNullableGuid (object o, Guid? value) { SetValue(o, value); }
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280 public virtual void SetNullableDateTime(object o, DateTime? value) { SetValue(o, value); }
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281 public virtual void SetNullableTimeSpan(object o, TimeSpan? value) { SetValue(o, value); }
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282 public virtual void SetNullableDateTimeOffset(object o, DateTimeOffset? value) { SetValue(o, value); }
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283
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284 #if !SILVERLIGHT
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285
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286 // SQL type setters.
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287 //
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288 public virtual void SetSqlByte (object o, SqlByte value) { SetValue(o, value); }
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289 public virtual void SetSqlInt16 (object o, SqlInt16 value) { SetValue(o, value); }
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290 public virtual void SetSqlInt32 (object o, SqlInt32 value) { SetValue(o, value); }
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291 public virtual void SetSqlInt64 (object o, SqlInt64 value) { SetValue(o, value); }
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292 public virtual void SetSqlSingle (object o, SqlSingle value) { SetValue(o, value); }
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293 public virtual void SetSqlBoolean (object o, SqlBoolean value) { SetValue(o, value); }
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294 public virtual void SetSqlDouble (object o, SqlDouble value) { SetValue(o, value); }
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295 public virtual void SetSqlDateTime(object o, SqlDateTime value) { SetValue(o, value); }
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296 public virtual void SetSqlDecimal (object o, SqlDecimal value) { SetValue(o, value); }
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297 public virtual void SetSqlMoney (object o, SqlMoney value) { SetValue(o, value); }
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298 public virtual void SetSqlGuid (object o, SqlGuid value) { SetValue(o, value); }
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299 public virtual void SetSqlString (object o, SqlString value) { SetValue(o, value); }
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300
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301 #endif
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302
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303 #endregion
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304 }
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305 }
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