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1 using System;
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2 using System.Diagnostics.CodeAnalysis;
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3
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4 using BLToolkit.Reflection;
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5
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6 namespace BLToolkit.TypeBuilder
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7 {
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8 ///<summary>
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9 /// Specifies a value holder type.
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10 ///</summary>
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11 [SuppressMessage("Microsoft.Performance", "CA1813:AvoidUnsealedAttributes")]
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12 [AttributeUsage(AttributeTargets.Property)]
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13 public class InstanceTypeAttribute : Builders.AbstractTypeBuilderAttribute
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14 {
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15 ///<summary>
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16 /// Initializes a new instance of the InstanceTypeAttribute class.
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17 ///</summary>
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18 ///<param name="instanceType">The <see cref="System.Type"/> of an instance.</param>
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19 public InstanceTypeAttribute(Type instanceType)
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20 {
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21 _instanceType = instanceType;
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22 }
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23
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24 ///<summary>
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25 /// Initializes a new instance of the InstanceTypeAttribute class.
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26 ///</summary>
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27 ///<param name="instanceType">The <see cref="System.Type"/> of an instance.</param>
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28 ///<param name="parameter1">An additional parameter.</param>
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29 ///<seealso cref="Parameters"/>
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30 public InstanceTypeAttribute(Type instanceType, object parameter1)
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31 {
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32 _instanceType = instanceType;
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33 SetParameters(parameter1);
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34 }
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35
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36 ///<summary>
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37 /// Initializes a new instance of the InstanceTypeAttribute class.
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38 ///</summary>
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39 ///<param name="instanceType">The <see cref="System.Type"/> of an instance.</param>
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40 ///<param name="parameter1">An additional parameter.</param>
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41 ///<param name="parameter2">An additional parameter.</param>
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42 ///<seealso cref="Parameters"/>
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43 public InstanceTypeAttribute(Type instanceType,
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44 object parameter1,
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45 object parameter2)
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46 {
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47 _instanceType = instanceType;
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48 SetParameters(parameter1, parameter2);
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49 }
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50
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51 ///<summary>
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52 /// Initializes a new instance of the InstanceTypeAttribute class.
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53 ///</summary>
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54 ///<param name="instanceType">The <see cref="System.Type"/> of an instance.</param>
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55 ///<param name="parameter1">An additional parameter.</param>
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56 ///<param name="parameter2">An additional parameter.</param>
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57 ///<param name="parameter3">An additional parameter.</param>
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58 ///<seealso cref="Parameters"/>
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59 public InstanceTypeAttribute(Type instanceType,
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60 object parameter1,
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61 object parameter2,
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62 object parameter3)
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63 {
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64 _instanceType = instanceType;
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65 SetParameters(parameter1, parameter2, parameter3);
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66 }
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67
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68 ///<summary>
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69 /// Initializes a new instance of the InstanceTypeAttribute class.
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70 ///</summary>
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71 ///<param name="instanceType">The <see cref="System.Type"/> of an instance.</param>
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72 ///<param name="parameter1">An additional parameter.</param>
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73 ///<param name="parameter2">An additional parameter.</param>
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74 ///<param name="parameter3">An additional parameter.</param>
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75 ///<param name="parameter4">An additional parameter.</param>
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76 ///<seealso cref="Parameters"/>
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77 public InstanceTypeAttribute(Type instanceType,
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78 object parameter1,
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79 object parameter2,
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80 object parameter3,
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81 object parameter4)
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82 {
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83 _instanceType = instanceType;
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84 SetParameters(parameter1, parameter2, parameter3, parameter4);
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85 }
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86
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87 ///<summary>
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88 /// Initializes a new instance of the InstanceTypeAttribute class.
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89 ///</summary>
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90 ///<param name="instanceType">The <see cref="System.Type"/> of an instance.</param>
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91 ///<param name="parameter1">An additional parameter.</param>
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92 ///<param name="parameter2">An additional parameter.</param>
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93 ///<param name="parameter3">An additional parameter.</param>
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94 ///<param name="parameter4">An additional parameter.</param>
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95 ///<param name="parameter5">An additional parameter.</param>
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96 ///<seealso cref="Parameters"/>
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97 public InstanceTypeAttribute(Type instanceType,
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98 object parameter1,
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99 object parameter2,
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100 object parameter3,
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101 object parameter4,
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102 object parameter5)
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103 {
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104 _instanceType = instanceType;
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105 SetParameters(parameter1, parameter2, parameter3, parameter4, parameter5);
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106 }
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107
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108 ///<summary>
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109 /// Initializes a new instance of the InstanceTypeAttribute class.
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110 ///</summary>
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111 ///<param name="instanceType">The <see cref="System.Type"/> of an instance.</param>
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112 ///<param name="parameter1">An additional parameter.</param>
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113 ///<param name="parameters">More additional parameters.</param>
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114 ///<seealso cref="Parameters"/>
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115 public InstanceTypeAttribute(Type instanceType, object parameter1, params object[] parameters)
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116 {
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117 _instanceType = instanceType;
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118
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119 // Note: we can not use something like
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120 // public InstanceTypeAttribute(Type instanceType, params object[] parameters)
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121 // because [InstanceType(typeof(Foo), new object[] {1,2,3})] will be treated as
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122 // [InstanceType(typeof(Foo), 1, 2, 3)] so it will be not possible to specify
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123 // an instance type with array as the type of the one and only parameter.
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124 // An extra parameter of type object made it successul.
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125
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126 int len = parameters.Length;
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127 Array.Resize(ref parameters, len + 1);
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128 Array.ConstrainedCopy(parameters, 0, parameters, 1, len);
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129 parameters[0] = parameter1;
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130
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131 SetParameters(parameters);
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132 }
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133
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134 protected void SetParameters(params object[] parameters)
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135 {
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136 _parameters = parameters;
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137 }
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138
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139 private object[] _parameters;
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140 ///<summary>
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141 /// Any additional parameters passed to a value holder constructor
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142 /// with <see cref="InitContext"/> parameter.
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143 ///</summary>
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144 public object[] Parameters
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145 {
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146 get { return _parameters; }
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147 }
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148
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149 private readonly Type _instanceType;
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150 protected Type InstanceType
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151 {
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152 get { return _instanceType; }
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153 }
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154
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155 private bool _isObjectHolder;
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156 ///<summary>
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157 /// False (default value) for holders for scalar types,
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158 /// true for holders for complex objects.
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159 ///</summary>
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160 public bool IsObjectHolder
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161 {
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162 get { return _isObjectHolder; }
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163 set { _isObjectHolder = value; }
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164 }
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165
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166 private Builders.IAbstractTypeBuilder _typeBuilder;
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167 ///<summary>
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168 /// An <see cref="Builders.IAbstractTypeBuilder"/> required for this attribute
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169 /// to build an abstract type inheritor.
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170 ///</summary>
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171 public override Builders.IAbstractTypeBuilder TypeBuilder
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172 {
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173 get
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174 {
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175 return _typeBuilder ?? (_typeBuilder =
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176 new Builders.InstanceTypeBuilder(_instanceType, _isObjectHolder));
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177 }
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178 }
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179 }
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180 }
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