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1 using System;
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2 using System.Collections;
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3 using System.ComponentModel;
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4 using System.Runtime.InteropServices;
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5
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6 using BLToolkit.ComponentModel;
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7 using BLToolkit.Mapping;
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8 using BLToolkit.Validation;
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9
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10 namespace BLToolkit.Common
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11 {
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12 [Serializable, Trimmable, ComVisible(true), JetBrains.Annotations.UsedImplicitly]
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13 public abstract class EntityBase : ICustomTypeDescriptor
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14 {
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15 #region Protected members
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16
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17 protected virtual ICustomTypeDescriptor CreateTypeDescriptor()
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18 {
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19 return new CustomTypeDescriptorImpl(GetType());
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20 }
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21
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22 #endregion
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23
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24 #region ICustomTypeDescriptor Members
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25
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26 private static readonly Hashtable _hashDescriptors = new Hashtable();
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27
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28 [NonSerialized]
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29 private ICustomTypeDescriptor _typeDescriptor;
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30 private ICustomTypeDescriptor TypeDescriptor
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31 {
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32 get
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33 {
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34 if (_typeDescriptor == null)
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35 {
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36 Type key = GetType();
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37
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38 _typeDescriptor = (ICustomTypeDescriptor)_hashDescriptors[key];
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39
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40 if (_typeDescriptor == null)
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41 _hashDescriptors[key] = _typeDescriptor = CreateTypeDescriptor();
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42 }
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43
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44 return _typeDescriptor;
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45 }
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46 }
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47
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48 AttributeCollection ICustomTypeDescriptor.GetAttributes()
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49 {
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50 return TypeDescriptor.GetAttributes();
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51 }
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52
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53 string ICustomTypeDescriptor.GetClassName()
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54 {
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55 return TypeDescriptor.GetClassName();
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56 }
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57
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58 string ICustomTypeDescriptor.GetComponentName()
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59 {
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60 return TypeDescriptor.GetComponentName();
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61 }
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62
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63 TypeConverter ICustomTypeDescriptor.GetConverter()
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64 {
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65 return TypeDescriptor.GetConverter();
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66 }
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67
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68 EventDescriptor ICustomTypeDescriptor.GetDefaultEvent()
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69 {
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70 return TypeDescriptor.GetDefaultEvent();
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71 }
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72
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73 PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty()
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74 {
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75 return TypeDescriptor.GetDefaultProperty();
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76 }
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77
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78 object ICustomTypeDescriptor.GetEditor(Type editorBaseType)
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79 {
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80 return TypeDescriptor.GetEditor(editorBaseType);
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81 }
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82
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83 EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attributes)
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84 {
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85 return TypeDescriptor.GetEvents(attributes);
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86 }
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87
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88 EventDescriptorCollection ICustomTypeDescriptor.GetEvents()
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89 {
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90 return TypeDescriptor.GetEvents();
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91 }
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92
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93 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attributes)
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94 {
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95 return TypeDescriptor.GetProperties(attributes);
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96 }
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97
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98 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties()
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99 {
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100 return TypeDescriptor.GetProperties();
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101 }
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102
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103 object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd)
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104 {
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105 // Do not relay this call to TypeDescriptor. We are the owner.
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106 //
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107 return this;
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108 }
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109
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110 #endregion
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111
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112 #region Validation
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113
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114 public virtual void Validate()
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115 {
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116 Validator.Validate(this);
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117 }
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118
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119 public virtual bool IsValid(string fieldName)
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120 {
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121 return Validator.IsValid(this, fieldName);
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122 }
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123
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124 public virtual string[] GetErrorMessages(string fieldName)
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125 {
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126 return Validator.GetErrorMessages(this, fieldName);
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127 }
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128
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129 #endregion
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130 }
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131 }
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