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1 using System;
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2 using System.Collections.Generic;
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3
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4 namespace BLToolkit.Mapping
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5 {
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6
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7 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, Inherited = true, AllowMultiple = false)]
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8 public sealed class RelationAttribute : Attribute
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9 {
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10 #region Constructors
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11
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12 public RelationAttribute()
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13 {
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14 }
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15
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16 public RelationAttribute(Type destination)
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17 {
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18 _destination = destination;
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19 }
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20
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21 public RelationAttribute(string slaveIndex)
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22 {
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23 SlaveIndex1 = slaveIndex;
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24 }
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25
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26 public RelationAttribute(string slaveIndex, string masterIndex)
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27 : this(slaveIndex)
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28 {
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29 MasterIndex1 = masterIndex;
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30 }
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31
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32 public RelationAttribute(Type destination, string slaveIndex)
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33 : this(destination)
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34 {
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35 SlaveIndex1 = slaveIndex;
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36 }
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37
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38 public RelationAttribute(Type destination, string slaveIndex, string masterIndex)
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39 : this(destination)
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40 {
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41 SlaveIndex1 = slaveIndex;
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42 MasterIndex1 = masterIndex;
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43 }
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44
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45 #endregion
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46
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47 private Type _destination;
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48 public Type Destination { get { return _destination; } }
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49
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50 private string _masterIndex1;
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51 public string MasterIndex1 { get { return _masterIndex1; } set { _masterIndex1 = value; } }
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52
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53 private string _masterIndex2;
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54 public string MasterIndex2 { get { return _masterIndex2; } set { _masterIndex2 = value; } }
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55
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56 private string _masterIndex3;
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57 public string MasterIndex3 { get { return _masterIndex3; } set { _masterIndex3 = value; } }
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58
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59 private string _slaveIndex1;
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60 public string SlaveIndex1 { get { return _slaveIndex1; } set { _slaveIndex1 = value; } }
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61
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62 private string _slaveIndex2;
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63 public string SlaveIndex2 { get { return _slaveIndex2; } set { _slaveIndex2 = value; } }
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64
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65 private string _slaveIndex3;
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66 public string SlaveIndex3 { get { return _slaveIndex3; } set { _slaveIndex3 = value; } }
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67
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68 public MapIndex MasterIndex
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69 {
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70 get
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71 {
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72 List<String> index = new List<string>();
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73
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74 AddIndex(index, MasterIndex1);
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75 AddIndex(index, MasterIndex2);
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76 AddIndex(index, MasterIndex3);
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77
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78 if (index.Count == 0)
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79 return null;
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80
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81 return new MapIndex(index.ToArray());
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82 }
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83 }
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84
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85 public MapIndex SlaveIndex
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86 {
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87 get
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88 {
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89 List<String> index = new List<string>();
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90
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91 AddIndex(index, SlaveIndex1);
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92 AddIndex(index, SlaveIndex2);
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93 AddIndex(index, SlaveIndex3);
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94
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95 if (index.Count == 0)
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96 return null;
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97
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98 return new MapIndex(index.ToArray());
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99 }
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100 }
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101
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102 private void AddIndex(List<string> index, string field)
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103 {
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104 if (!string.IsNullOrEmpty(field))
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105 index.Add(field);
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106 }
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107 }
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108 }
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